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Teledyne Doll 200AU User's Manual

1. nnn nnne 8 1 TABLE 8 2 PREVENTATIVE MAINTENANCE CALENDAR cri 8 2 TABLE ST TESTA UNCTIONS 35 nod po eL na etd a end coude ads tud det 9 4 TABLE 9 1 TEST FUNCTIONS CONTINUED nnn nnn nn nnns 9 5 TABLE 9 1 TEST FUNCTIONS CONTINUED 9 6 TABLE 9 1 TEST FUNCTIONS CONTINUED c c lle aLe aLaaa 9 7 TABLE 9 2 FRONT PANEL WARNING MESSAGES 1 11 2 2201 44 9 9 TABLE 9 2 FRONT PANEL WARNING MESSAGES CONTINUED 2 9 10 TABLE 9 3 SUMMARY OF DIAGNOSTIC 1 1 1 1 9 12 TABLE 9 4 DIAGNOSTIC MODE SIGNAL 9 13 TABLE 9 4 DIAGNOSTIC MODE SIGNAL I O 9 14 TABLE 9 4 DIAGNOSTIC MODE SIGNAL I O 9 15 TABLE 9 4 DIAGNOSTIC MODE SIGNAL I O CONTINUED 9 16 TABLE 9 5 MODEL 200AU VARIABLES ii ee een 9 20 TABLE 9 6 TEST CHANNEL 9 21 TABLE 9 6 TEST CHANNEL READINGS CONTINUED 9 22 TABLE 9 7 MOTHERBOARD JUMPER 65
2. a data collector to the RS 232 port Setup Menu 1 Level 1 Level 2 Level 3 Level 4 Description Section VIEW Select which DAS data 5 3 3 collector to view PREV Scroll through data collectors 5 3 3 NEXT CONC PNUMTC CAL DAT STABILITY EDIT Allows editing of the several 5 3 3 attributes of a data collection channel UP Displays the DAS data buffer 5 3 3 Move UP 1 average in the DAS data buffer UP10 Move UP 10 averages in the 5 3 3 DAS data buffer DOWN Move down 1 average in the 5 3 3 DAS data buffer DOWNIO Move DOWN 10 averages in 5 3 3 the DAS data buffer PRNT Prints the setup parameters of 5 3 3 5 7 Teledyne API Model 200AU NO Analyzer Instruction Manual 02293 Rev Table 5 4 Setup Menu Setup Menu 2 Level 1 Level 2 Level 3 Level 4 Description Section RANGE Range control menu 5 3 4 MODE Range mode select Single 5 3 4 Autorange Independent Remote SET Sets range if mode is Single 5 3 4 1 range NO Sets NO concentration range if 5 3 4 3 indep ranges enabled NOx Sets NO concentration range if 5 3 4 3 indep ranges enabled NO2 Sets concentration range if 5 3 4 3 indep ranges enabled LO Sets low range if Autorange 5 3 4 2 enabled HI Sets high range if Autorange 5 3 4 2 enabled UNITS Unit selection menu 5 3 4 5 PPB UGM Select units that instrument uses 5 3 4 5 DIL Enter dilution facto
3. iii 4 8 5 SOFTWARE FEATURES nad ae 5 1 5 1 INDEX TO FRONT PANEL MENUS EHER ae 5 1 SN NET Aa 5 4 S MM 5 6 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 9 2 SAMPLE MODE EN 5 10 SARE NINNI E PM 5 10 5 2 2 CAL CALS CALZ Calibration 2 21 21 0 5 13 8 3 SET UP MODE 5 16 5 3 1 Configuration Information CFG 5 16 5 3 2 Automatic Calibration AutoCal nn 5 16 5 3 3 Data Acquisition System DAS 2 22 2222 5 16 5 3 4 Range Menu ER rar re 5 19 5 3 Password Enable tee re ts us ets EEE 5 21 5 3 0 Time or Day LOCKER a a alas 5 22 5 3 7 Diagnostic dE 5 22 5 3 9 Communications Mel itinerante 5 22 5 3 9 Variables Menu 2 220222 5 22 5 3 10 M200AU Operating Modes 111111111111 5 22 Su STATUS OUTPUTS a dnd a eid Do dod e less An fs ind And f O 5 23 925 232 INTERFACES 5 24 5 5 1 Setting Up the RS 232 22 2 2 2 1 44 4414 16 5 25 2 O iaia 5 28 5 5 3 TEST Commands and 00 0001 5 32 5 5 4 WARNING Commands Messages
4. eene 5 33 5 5 5 CALIBRATION Commands and Messages nn 5 34 5 5 6 DIAGNOSTIC Commands and Messages 5 36 5 5 7 DAS Commands and Message 22211 1111 1 5 37 9 5 8 Internal Variables 22 52 Rene keke hee Mee Ree Mee Ree eens 5 39 6 OPTIONAL HARDWARE AND 1 2 6 1 6 1 RACK MOUNT OPTIONS ssa eee 6 1 OZ ZERG SPAN VALVES c lee 6 1 6 3 AUTOCAL SETUP ZERO OPAN VALVES cueing ind 6 2 6 4 4 20 MA CURRENT LOOP 6 4 6 9 NO CONVERTER ERETTE eset es 6 4 7 CALIBRATION amp ZERO SPAN CHECKS 7 1 7 1 MANUAL ZERO SPAN CHECK OR CAL WITH ZERO SPAN GAS IN THE SAMPLE PORT 7 4 7 2 MANUAL ZERO SPAN CHECK OR CALIBRATION WITH ZERO SPAN VALVES OPTION 7 6 f AUTOMATIC ZEROIOPAN CHECK en nee a ee 7 7 7 4 DYNAMIC ZERO SPAN CALIBRATION eate tue ic 7 7 7 5 USE OF ZERO SPAN VALVES WITH REMOTE CONTACT CLOSURE 7 8 7 6 EPA PROTOCOL CALIBRATION e 7 9 7 6 1 Calibration of Equipment a Einen 7 9 7 6 2 Calibration Gas and Zero Air Sources 7 11 Data Recording Device sn nee ei ela ade sla pal el
5. 1 2 2 16 9 41 TABLE 9 8 V F BOARD SWITCH SET TINGS a 9 42 TABLE 9 9 POWER SUPPLY MODULE SUBASSEMBLIES 40 e nennen nnn 9 48 TABLE 9 10 POWER SUPPLY MODULE LED OPERATION 40 nennen 9 51 TABLE 9 11 OZONE GENERATOR CONTROL CONDITIONS 9 53 TABLE 10 1 TELEDYNE M200AU SPARE PARTSLIST en 10 1 TABLE 10 1 TELEDYNE API M200AU SPARE PARTS LIST CONTINUED 10 2 TABLE 10 2 TELEDYNE API MODEL 200AU EXPENDABLE KIT 10 3 TABLE A T ELEGTRIGAL SCHEMATICS na A 1 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F INTENTIONALLY BLANK Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 1 HOW TO USE THIS MANUAL The Model 200AU has been designed to provide serviceability reliability and ease of operation The M200AU s microprocessor continually checks operating parameters such as temperature flow and critical voltages The instrument s modular design uses captive screws to facilitate repair and ease of access If you encounter any difficulty refer to Section 9 General Troubleshooting Hints We recognize that the need for information in this manual changes as time passes When the instrument first arrives it is necessary to get it up and run
6. 2 13 TABLE 4 1 FRONT PANEL STATUS EDS nio i i ilo ie 4 6 TABLE 4 2 OZONE GENERATOR START UP 1 62220 6 4 8 TABLES SAMPLE MENU intriso tilde ele eee 5 4 TABLE 5 2 SAMPLE MENU 5 5 TABLE 5237 id it a ee el 5 6 TABLE 5 3 SETUP MENU CONTINUED 5 7 TABLET an EI LASER 5 8 TABLE D 5 SETUP MENU s nali nee 5 9 TABLE 5 6 DAS DATA CHANNEL EDITING iii 5 19 TABLE 5 7 CALIBRATE SETUP PASSWORDS ala ii catene sudes anna 5 21 TABLE 5 8 M200AU OPERATING MODES 2 2 6 5 23 TABLE 5 9 STATUS OUTPUT PIN SSIGNMENTS 0 u 1 54 42 5 24 TABLE 5 10 RS 232 PORT SETUP FRONT PANEL 5 25 TABLE 5 11 RS 232 SWITCHING FROM TERMINAL MODE TO COMPUTER MODE 5 27 TABLE 5 12 RS 232 TERMINAL MODE EDITING KEYS 5 27 TABLE 5 13 RS 232 COMMAND SUMMARY 0 cere 5 29 TABLE 5 14 RS 232 COMMAND SUMMARY i iii een 5 30 TABLE 5 15 RS 232 INTERFACE COMMAND TYPES ee nennen nnne nnne 5 31 TABLE 5 16 RS 232 TESTMESSAGESE DINE RU NUN ED 5 32 TABLE 5 17 RS 232 WARNING MESSAGES er 5 33 TABLE 5 18 RS 232 C
7. Table 7 12 Expected Span Gas Concentration Procedure Step Number Action Comment 1 Press This key sequence causes the M200AU to prompt for the CAL CONC NOX expected NO concentration Enter the NO span concentration value by pressing the key under each digit until the expected value is set This menu can also be entered from CALS or CALZ 2 Press ENTR ENTR stores the expected NO span value 3 Press Now enter the expected NO span concentration as in step one CAL CONC NO 4 Press ENTR Pressing ENTR stores the NO span value and returns the prompt to the CONC menu 5 Press EXIT Returns instrument to SAMPLE mode Sample the generated concentration until the NO and the NO responses have stabilized Span the instrument by the following procedure Table 7 13 Span Calibration Procedure Step Number Action Comment 1 Press CAL The M200AU enters the calibrate mode from sample mode When the CAL button is pressed the adaptive filter is activated This allows the instrument to respond rapidly to concentration changes regardless of their magnitude 2 Wait 10 min Wait for readings to stabilize at span values 3 Press SPAN If you change your mind after pressing SPAN you can still press EXIT here without spanning the instrument 4 Press ENTR Pressing ENTR actually changes the calculation equations 5 Press EXIT M200AU returns to SAMPLE mode 7 20
8. 0 9 25 FIGURE 9 2 CPU BOARD JUMPER SETTINGS 1 1 1 9 34 FIGURE 9 3 RS 232 PIN ASSIGNMENTS 20220200 2 9 38 FIGURE 9 4 VIF BOARD SETTINGS e 9 44 FIGURE 9 5 POWER SUPPLY MODULE LAYOUT dra ri 9 49 FIGURE 9 6 ELECTRICAL BLOCK DIAGRAM nennen 9 50 FIGURE 9 7 OZONE GENERATOR 0 5 1 1 9 54 FIGURE 9 8 FLOW PRESSURE 4 hene 9 57 FIGURE 9 9 NOx SENSOR MODULE alla nia nola leale aaa 9 58 FIGURE 9 10 NOx SENSOR 9 59 FIGURE 9 11 PMT COOLER 5 144 6 ase 9 61 FIGURE 9 12 HIGH VOLTAGE POWER 1 9 63 vii Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F LIST OF TABLES TABLE 2 1 FINAL TEST AND CALIBRATION 5 41 400 2 12 TABLE 2 1 FINAL TEST AND CALIBRATION VALUES CONTINUED
9. i Tr VLA E E amp 5 st SE gu le o 3 E ii ul lt lt BL A a io Lr 2 a 2 OQIOIZIZ U mix Z NNW O mel C CC Cr 2 DE OF O Nico I lt N UN SIGNM ENT ce Pyro NM N 2 x lt E SE lt S 3 x LA 2 N NINI SILO CO Ma NO Figure 2 2 Rear Panel Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F SA 4 3IN AS X AS lt x pe R P em x N 2 N IN V 2 EN A 2 3 er i NL f m b i ED lol p8 sfo 9 Figure 2 3 Inlet and Exhaust Venting 2 5 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev 2 3 Initial Operation 1 2 After confirming proper supply voltage turn on the instrument power The display should immediately light displaying the instrument type M200AU and the computer s memory configuration If you are unfamiliar with the M200AU we recommend that you read the overview Section 4 before proceeding A diagram of the software menu trees is in Figure 5 1 and Figure 5 2 The M200AU requires about 30 minutes for all internal components to come up to temperature During this t
10. 9 1 5 Test Channel Analog Output Many of the TEST functions have an analog voltage associated with them As a diagnostic aid it is possible to route the various test voltages out the 4th analog output port Details on using the test channel analog output are in the Troubleshooting Section Table 9 6 Test Channel Readings TEST Channel Minimum Maximum Description PMT DETECTOR 0 mV 5000 mV PMT detector output from the preamp This signal has been amplified and filtered Since the instrument is switched and uses AutoZero normal values can vary from 100 to 5000 mV Wide variations in this signal are normal Values should be around 0 mV when sampling zero air OZONE FLOW 0 cc min 1000 cc min This signal is the output from the ozone flowmeter Values around 1150 mV indicate zero flow Typical values for 80cc min ozone flow are around 1800 mV Voltage should be steady indicating stable flow SAMPLE FLOW 0 cc min 1000 cc min The sample flow is calculated from the upstream pressure as measured by the SAMPLE PRESSURE transducer SAMPLE PRESSURE 0 Hg Abs 40 Hg Abs The sample pressure is measured by an absolute pressure meter The absolute pressure at sea level 1s 29 92 Hg The exact reading will vary a few tenths due to passing weather fronts and daily temperature cycling The reading will decrease about 1 Hg with each 1000 ft gain in altitude For example the
11. Re 9 2 0 Unstable Span En AAC 9 2 7 Unstable Zero rn techn a ira AAA ADA e 9 2 8 A siae ciali lo cello lle chi ai 929 Inabilily t0 Zero oie none oe Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 9 2 10 Non Linear Respolse AAA ERE RENATE EEA HR E ERA ERE REO 9 31 9 2 11 Slow RES PONS O si ee 9 32 9 2 12 Analog Output Doesn t Agree with Display Concentration 9 32 9 3 SUBSYSTEM TROUBLESHOOTING AND ADJUSTMENTS i 9 32 9 3 1 Computer Displays Keyboard ono 9 32 9 3 2 15 232 GOMMUNICAHONS 5 LEERE 9 36 9 3 3 Voltage Frequency V F io oie eei has 9 39 3 4 51 6 Mee 9 45 9 3 9 E ll ere Eiio 9 47 9 3 6 Ozone Generator i e quid oes ivi aaa and ia 9 52 9 3 7 Flow Pressure Sensor 9 55 93 8 NO Sensor Modales tion 9 60 9 3 IS VINES SEE olan eal ane abet erate 9 64 9 3 10 Pneumatic System essen seen tros 9 65 10 M200AU SPARE PARTS 118 1 1 10 1 APPENDIX A ELECTRICAL SCHEMATICS A 1 vi Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev LIST OF FIGURES FIGURE 2 1 REMOVAL OF SHIPPING SCREWS CHECK FOR CORRECT POWER 2 3 FIGURE 2 2 gt REARPANEL religio lo
12. 10 Press EXIT Pressing EXIT returns the instrument to SAMPLE mode 2 8 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Step 3 Review the quality of the calibration Calibration Quality Check Procedure Step Number Action Comment 1 Scroll the TEST The SLOPE value for NO should be 1 0 0 3 If the value is function menu until not in this range check Section 7 8 or 9 If the SLOPE value the NO SLOPE is is in the acceptable range the instrument will perform displayed optimally 2 Scroll the TEST The SLOPE value for NO should be 1 0 0 3 If the value is function menu until not in this range check Section 7 8 or 9 Ifthe SLOPE is in the NO SLOPE is the acceptable range the instrument will perform optimally displayed NOTE The NO and NO slopes should be equal within 0 1 4 Scroll the TEST The M200AU will display the OFFSET parameter for the NO function menu until equation This number should be near zero A value of 0 0 mV the NO OFFSET is 10 150 mV indicates calibration in the optimal range If the displayed OFFSET value is outside this range check Section 7 or 9 for procedures to correct the OFFSET value to near zero 5 Scroll the TEST The instrument will now display the NO OFFSET value It function menu until should also have a value near zero 0 0 mV 10 150 mV the NO OFFSET is displayed Step 4 The M200AU is
13. Figure 9 4 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev 9 3 3 2 Changing Output Voltage Ranges Several different output voltage ranges can be selected by switches on the V F board See Figure 9 4 for the switch settings 9 3 4 Status Temp Board The Status Temp Board is a multi function board that Converts the resistance readings of the thermistors to voltages Conditions the thermocouple voltage for the V F card Provides status output circuitry Provides circuitry for contact closure inputs Provides circuitry for display brown out reset at low line voltage GU Provides chip carriers for voltage to current modules 9 3 4 1 Temperature Amplifier Section The Status Temp board is a multi function board consisting of 4 thermistor amplifiers that monitor 1 IZS temperature not available on the M200AU 2 Reaction Cell temperature 3 Box temperature 4 Spare 4 amplifiers have a single gain control R34 If necessary you can adjust the temperature values by selecting the BOX TEMP TEST function and adjusting R34 until the correct box temp is shown Remember that the temperature inside the case runs several degrees higher than room temperature which should be taken into account when setting BOX TEMP The voltages of the thermistor and thermocouple amplifier outputs are brought out to test points on the edge of the board Refer to the Status Temp board schematic for details
14. Automatic temperature pressure compensation See Table 9 5 Be iem qe we Alternate units make sure ppb units are selected for EPA monitoring See Section 5 3 4 5 5 Autoranging option See Section 5 3 4 2 Converter efficiency should be set prior to calibration since its value is used in the computation of the NO and NO concentration outputs The analyzer should be calibrated on the same range used for monitoring If AutoRanging or Independent range options are selected the highest of the ranges will result in the most accurate calibration and should be used Make sure the GPT calibration system can supply the range of concentrations at a sufficient flow over the whole range of concentrations that will be encountered during calibration Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Figure 7 2 Diagram of GPT Calibration System 7 18 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 7 6 5 1 Zero Calibration Procedure Since the zero gas concentration is defined as 0 ppb it is not necessary to enter the expected zero value The following Table 7 11 details the zero calibration procedure Table 7 11 Zero Calibration Procedure Step Number Action Comment 1 Press CAL The M200AU enters the calibrate mode from sample mode NOTE The analyzer does not operate the zero span valves in this mode the zero gas enters through the sample port When the CAL bu
15. Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev 7 CALIBRATION amp ZERO SPAN CHECKS There are several ways to check and adjust the calibration of the M200AU These different methods are summarized in Table 7 1 In addition all of the methods described in this section can be initiated and controlled via the RS 232 port We strongly recommend that SPAN CALIBRATION be done with NO span gas SPAN CHECKS can be done with either NO only NO only or a mixture of NO and NO GPT Zero air used for all calibration procedures including GPT should have 1 ppt NO and NO less than 1 ppt of major interferents such as SO NH3 and hydrocarbons and a dew point of 5 C or less The calibration gasses should be from a reliable supplier since the quality of the tank concentration values ultimately determines the accuracy of the analyzer EPA protocol calibration gasses should be used for EPA monitoring see Section 7 6 NOTE If you are using the M200AU for EPA monitoring only the calibration method described in Section 7 6 should be used NOTE If there are any problems completing any of the following procedures refer to Section 9 2 8 and 9 2 9 Unable to Span or Zero Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Table 7 1 Types of Zero Span Check and Calibration Section of Cal or Check Description 7 1 Manual
16. 4 S 44 20 UA EP V 4 a Figure 8 3 Reaction Cell Assembly Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 8 5 Replacing the Molybdenum Converter The Molybdenum Converter is located in the center of the instrument refer to Figure 2 5 for its location Refer to Figure 8 4 The heater thermocouple converter is designed to be replaced as a single unit 1 Turn off the power to the M200AU and allow the converter to cool 2 Remove the entire assembly from the chassis A Remove the pneumatic fittings from the valves B Remove the power to the valves thermocouple wire and cartridge heater C Remove the converter assembly from the chassis by loosening the 4 captive screws that secures the assembly to the chassis CAUTION The converter operates at 315 C Severe burns can result if not enough time is allowed for the assembly to cool Do not handle assembly until it is at room temperature 3 Disconnect the gas fittings and power cable grounding from the can 4 Remove the valve assembly and bottom bracket and re attach those two parts to the replacement moly assembly 5 Re attach the pneumatic fittings and valve assembly to the can 6 Install the assembly back into the analyzer Re attach the electrical and pneumatic fittings Leak check the assembly when completed 7 Turn the power back on The insulation can emit burnt odor for the first 24
17. A periodic check is used to assess the data for precision A one point precision check must be carried out at least once every 2 weeks on each analyzer at an NO concentration between 0 08 and 0 10 ppm The analyzer must be operated in its normal sampling mode and the precision test gas must pass through all filters scrubbers conditioners and other components used during normal ambient sampling The standards from which precision check test concentrations are obtained must be traceable to NIST SRM Those standards used for calibration or auditing may be used 7 6 10 3 Precision Check Procedure 1 Connect the analyzer to a precision gas that has concentration between 0 08 and 0 10 ppm NO precision gas may be generated by either GPT or a NO permeation tube If a precision check is made in conjunction with a zero span check it must be made prior to any zero or span adjustments 2 Allow the analyzer to sample the precision gas until a stable trace is obtained Record this value NO and NO precision checks should also be made if those data are being reported Information from the check procedure is used to assess the precision of the monitoring data see Section 2 0 8 Q A Handbook for procedures for calculating and reporting precision 7 6 11 Recommended Standards for Establishing Traceability To assure data of desired quality two considerations are essential 1 the measurement process must be in statistical control at
18. Enter the expected NO and NO span gas concentrations Table 7 3 Enter Expected Span Gas Concentrations Procedure Step Number Action Comment 1 Press This key sequence causes the M200AU to prompt for the CAL CONC NOX expected NO concentration Enter the NO span concentration value by pressing the key under each digit until the expected value is set This menu can also be entered from CALS or CALZ 2 Press ENTR ENTR stores the expected NO span value 3 Press Now enter the expected NO span concentration as in step one CAL CONC NO 4 Press ENTR Pressing ENTR stores the NO span value and returns the prompt to the CONC menu 5 Press EXIT Returns instrument to SAMPLE mode If desired compensation for moly converter efficiency CE can be included in the NO concentration calculation The CE must be entered prior to calibration Refer to Section 7 6 6 1 for the CE procedure Table 7 4 Manual Span Calibration Procedure Span Gas thru Sample Port Step Number Action Comment 1 Press The M200AU enters the calibrate mode NO span gas should be fed to the sample port When the CAL button is pressed the adaptive filter is activated This allows the instrument to respond rapidly to concentration changes regardless of their magnitude Wait 10 min Wait for reading to stabilize at span value Press SPAN If you change your mind after pressing SPAN you can still pre
19. If connecting to a modem check the following Modems are especially difficult because they may have pins that need to be at certain EIA RS 232 levels before the modem will transmit data The most common requirement is the Ready to Send RTS signal must be at logic high 5V to 15V before the modem will transmit The Teledyne API analyzer sets pin 8 RTS to 10 volts to enable modem transmission 9 36 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F To troubleshoot modem connection first disconnect the RS 232 cable from the Analyzer and verify use a DVM that you are getting a signal on Pin 2 of the RS232 port on the Analyzer The signal will be between 5V and 15V with respect to signal ground pin 5 If not there is a problem with the CPU board or the cable This is the transmit TD signal out of the Analyzer This should then be connected to TD input on the modem normally Pin 2 Ifthe Analyzer is equipped with a DTE DCE switch you may need to change its setting so the signal is on Pin 2 Second Go to the cable connected to the modem terminal and verify use a DVM that you are getting a 5V to 15V signal on Pin 3 of the cable This pin should be connected to Pin 3 of the Teledyne API Analyzer Third for modems Check that the voltage level on Pin 8 ofthe Analyzer is between 5V and 15V This pin should be connected through the cable to Pin 4 ofthe modem Now set the baud rate of the Analyzer t
20. Make sure the expected span concentration is entered Check for dirty reaction cell Do the factory calibration procedure located in Section 9 1 6 OZONE GEN OFF Ozone generator is off See Table 9 11 for conditions PRACT WRN XXX X MV The Pre reactor circuit compensates for detector dark current and background light Certain electrical faults cause high readings to be added to the filter First the cause of the high PREREACT reading should be found and repaired then wait 10 minutes for the Pre reactor filter to clear itself out A D NOT INSTALLED V F board has failed The V F board did not respond to commands from the CPU This probably means 1 board not seated in socket 2 defective board 3 defective back plane connector HVPS WARNING High Voltage Power Supply voltage out of limits Limits are 400 900 VDC DCPS WARNING DC Power Supply voltage out of limits Limits are 2500 500 mV 9 10 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 9 1 3 Fault Diagnosis using DIAGNOSTIC Mode Diagnostic mode can be looked at as a tool kit of diagnostics to help troubleshoot the instrument To enter DIAG mode press SETUP MORE DIAG The diagnostic modes are summarized in Table 9 3 To access these functions after you have pressed SETUP MORE DIAG press NEXT PREV to select the desired mode then press ENTR Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 R
21. Record the NO NO and NO concentrations for each additional point 4 Calculate the resulting NO concentrations as follows Fyo mp Fr NO NO NO Equation 7 10 Where NO onic is the NO concentration before the GPT ozone is turned on and NO rem is the NO remaining after GPT 5 Plot the concentration output by the instrument on y axis against the generated NO on the x axis The plot should be a straight line within the 2 linearity criteria given for the NO and NO channels If the plot is not linear the most likely cause is that the converter needs replacing See Section 7 6 6 on Moly converter efficiency 7 22 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev 7 6 6 Moly Converter Efficiency The moly efficiency should be 96 to 102 efficient If it is outside these limits it should be replaced The converter efficiency can be determined from the data collected in Section 7 6 5 3 For each NO concentration generated 1 Calculate the concentration of converted as NO cos NO our orc Dy Equation 7 11 Where NOx oric is the NO concentration before the GPT ozone is turned on and rem is the NO remaining after GPT 1 Plot the NO conv concentration output by the instrument on the y axis against the concentration generated NO our on the x axis The plot should be a strai
22. Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Step 2 Calibrate the instrument Zero Span Calibration Procedure Step Number Action Comment 1 Input Zero gas Allow Zero gas to enter the sample port on the rear of the instrument Press CAL The M200AU enters the calibrate mode from sample mode When the CAL button is pressed the adaptive filter is activated This allows the instrument to respond rapidly to concentration changes regardless of their magnitude Wait 10 min Wait for reading to stabilize at the zero value If you wait less than 10 minutes the final zero value may drift Press ZERO The ZERO button will be displayed Press ENTR Pressing ENTR actually changes the calculation equations and zeroes the instrument Input Span Gas Switch gas streams to span gas Wait 10 min Wait for reading to stabilize at the span value If you wait less than 10 minutes the final span value may drift Press SPAN The SPAN button should be displayed If it is not check the Troubleshooting Section 9 2 8 for instructions on how to proceed In certain circumstances at low span gas concentrations 100ppb both the ZERO and SPAN buttons will appear Press ENTR Pressing ENTR actually changes the calculation equations so that the concentration displayed is the same as the expected span concentration you entered above thus spanning the instrument
23. The voltages can also be read using the DIAGNOSTIC SIGNAL I O feature See Table 9 4 for details 9 45 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F In addition there is a thermocouple amplifier for the Moly converter Thermistor Temperature Amplifier Adjustments If the temperature readouts are in error 1 Locate the Box temp thermistor on the board and place a calibrated thermometer near the thermistor 2 Select the BOX TEMP TEST function on the front panel 3 Adjust R34 until the front panel readout matches the thermometer readout This will cause all ofthe readouts to accurately measure their respective temperatures Molybdenum Converter Thermocouple Amplifier Adjustments The molybdenum converter temperature is sensed by a thermocouple The cold junction compensation and signal conditioning is done on the Temp Status board The buffer amplifier from the thermocouple amplifier to the CPU for the Moly temperature has a gain adjustment The voltage times 100 at pins 8 9 of Ul is the Moly temperature in degrees C For example 3 15 VDC at pin 9 of Ul is 315 C The CPU is programmed to always drive the temp to 315 C so the voltage at Ul must be used as the absolute reference as to the correct temperature The temperature will vary 3 degrees due to the operation of the temperature control loop in the CPU The R6 pot on the Status Temp board can adjust the temperature To adjust the molybdenum c
24. a Factory Calibration Procedure should be performed see Section 9 1 6 Before the actual calibration is performed switches on the V F card must be correctly set and jumpers set on the motherboard Jumper and switch setting changes must be performed with the instrument power OFF Motherboard Jumpers The motherboard contains 4 pairs of jumpers JP1 JP8 one pair for each analog output channel Each channel can be configured for either voltage or current output Use Table 9 7 to configure the jumpers Table 9 7 Motherboard Jumper Settings Analog output Terminal Pair Jumper Jumper Setting for Jumper Setting Rear panel Pair Voltage Mode for Current Mode DAC 0 NOx 3 4 JP3 JP4 B C A B DAC 1 NO 5 6 JP2 DAC 2 2 1 2 5 JP6 3 TEST 7 8 7 JP8 V F Board Switch Settings There are 2 different types of current outputs Non Isolated and Isolated Each requires a different switch setting shown below If you are operating the instrument in voltage output mode the switches should be set to the desired voltage range 9 41 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Table 9 8 V F Board Switch Settings DACH Sw 1 2 3 Sw 4 Sw 5 Sw 6 Sw 7 0 ON OFF OFF 1 ON OFF OFF 2 ON OFF OFF 3 ON OFF OFF Required settings 10 V output or n
25. chamber and using an appropriate formula 3 Determine the required minimum total flow output Fr using Equation 7 1 analyzer flow demand cm min x 110 100 Equation 7 1 If more than one analyzer is to be calibrated at the same time multiply Fr by the number of analyzers 7 13 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 4 Calculate the NO concentration NO our needed to approximate 90 of the URL of the NO2 analyzer to be calibrated using Equation 7 2 NO our URL of analyzer ppm x 90 100 Equation 7 2 5 Calculate the NO flow required to generate the NO concentration NO Jour using Equation 7 3 NO NO Jour Fr Equation 7 3 NO srp 6 Calculate the required flow through the ozone generator Fo using Equation 7 4 Fyo Equation 7 4 uU 2 75 ppm min cs Verify that the residence time tr in the reaction chamber is lt 2 min using Equation 7 5 Vic te lt 2min Equation 7 5 Fo Fo 8 Verify that the dynamic parameter specification Pg of the calibrator s reaction chamber 15 22 75 ppm min using Equation 7 6 Fo x Fo Fro Fo Fro P x gt 2 75 Equation 7 6 NOTE If t is gt 2 minutes or if Pr is lt 2 75 ppm min changes in flow conditions Fr Fo or in the reaction chamber volume or both will have to be made and t and Pg will have to be re calculated 9 After equatio
26. ooocccocccocccnnccnncnnnanonancnnnnnnnnonaronnnnnnanonaronnnnnnnnonarennncnnanananess 84 CLEANING THE REACTION eoa ete o ton cei oto ton ec e tate o tb eto otto 8 5 REPLACING THE MOLYBDENUM CONVERTER 8 6 PNEUMATIC LINE 1 0 8 7 EEAKCHECK PROCEDURE 25 cete cd tt et e cet Co A AA 8 8 LIGHT LEAK CHECK PROCEDURE cerci 8 9 PROM REPLACEMENT PROCEDURE 9 TROUBLESHOOTING ADJUSTMENTS 9 1 OPERATION VERIFICATION M200AU DIAGNOSTIC 9 1 1 Fault Diagnosis with TEST Variables nn 9 1 2 Fault Diagnosis with WARNING Messages 9 1 3 Fault Diagnosis using DIAGNOSTIC 9 1 4 M200AU Internal VINOS in 9 1 5 Test Channel Analog Output 2 209 od ona pog d suoque 9 1 6 Factory Calibration 9 2 PERFORMANCE PROBLEMS decet tete eee ne Ee rene t Eee ees 9 2 1 AC Power Check lt A 9 2 2 FlOW Check ee ica rr catena caca A Ad 9 2 3 No Response to Sample 9 244 Negative illo slo ica olo iosa enges 9 25 EXCOSSIVO NOISE
27. they are summarized in Table 7 1 For instruments not equipped with the external converter option we recommend calibration with zero air and span gas coming in through the sample port The procedure is Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Step 1 Enter the expected NO and NO span gas concentrations Step Number Action Comment 1 Press This key sequence causes the M200AU to prompt for the CAL CONC NOX expected NO concentration Enter the NO span concentration value by pressing the key under each digit until the expected value is set 2 Press ENTR ENTR stores the expected NO span value This value will be used in the internal formulas to compute subsequent NO concentration values 3 Press In the same CAL CONC sub menu press the NO button and CAL CONC NO enter the expected NO span value then ENTR As before this value will be used in the internal formulas to compute the subsequent NO concentration values 4 Press EXIT EXIT Returns instrument to SAMPLE mode 5 Press If necessary you may want to change ranges Normally the SETUP RNGE instrument is shipped in single range mode set at 500 ppb We MODE SING ENTR recommend doing the initial checkout on the 500 ppb range 6 Press After SETUP RNGE SET enter 500 and press ENTR The SETUP RNGE SET instrument will now be in the 500 ppb range T Press EXIT Returns instrument to SAMPLE mode 2 7
28. 200AU NOx Analyzer Instruction Manual 02293 8 MAINTENANCE 8 1 Maintenance Schedule NOTE The operations outlined in this chapter are to be performed by qualified maintenance personnel only Table 8 1 Preventative Maintenance Schedule Item Maintenance Interval Reference Section TEST Functions 6 12 month intervals Table 9 1 Zero Span Calibration Annually or after repairs Section 7 Zero Span Checks Daily Section 7 Table 6 2 Particulate Filter Weekly as needed Figure 8 1 Filter for PermaPure Drier Replace every 12 months Figure 9 7 Reaction Cell Window Clean annually or as necessary Section 9 3 8 8 4 Figure 8 3 Ozone Flow Check every year Figure 9 9 Section 9 3 7 Sample Flow Check every year Figure 9 9 Section 9 3 7 Moly Converter Check efficiency every 6 Figure 8 4 Section 8 5 months Pneumatic Lines Examine every 12 months clean if necessary Figure 8 5 Figure 8 6 Figure 8 7 Factory Calibration Calibrate each year or after repairs Section 9 1 6 Leak Check Check every year Section 8 7 O rings Replace if seal is broken Figure 9 9 Figure 9 10 8 1 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev Table 8 2 Preventative Maintenance Calendar Item Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec en Interval intervals Zero Span Annually or after Calibratio
29. 4 for a table of approximate expected voltages Adjust R27 until the displayed voltage matches the DVM voltage then press ENTR D The M200AU will display a voltage near 90 of the voltage range set in the above procedure Adjust R31 until the displayed voltage matches the DVM voltage then press ENTR This step calibrates the instrument A D converter to the external DVM E The M200AU will automatically scroll through the DAC output channels calibrating each one The display will update the progress of the calibration If operating all analog outputs in voltage mode this completes the calibration procedure The calibration of each channel can be checked or recalibrated independently by scrolling the PREV NEXT buttons and pressing CAL for the desired channel Also a DC offset bias can be entered by pressing the OFFSET button for the appropriate channel Calibrating a channel for current loop operation 1 BEFORE STARTING make sure that hardware settings are correct as shown in Table 9 6 and Table 9 7 gt Calibrate the A D converter as described in item 2 above if necessary 3 Connect a 250 ohm resistor in series with a current meter to the correct pair of terminals on the rear panel see Figure 2 2 for terminal assignments 4 In the D A calibration Menu press CFG then use PREV NEXT to select the channel to be calibrated Press the SET button to select CURR for current loop operation then press ENTR To enter the calibratio
30. 5 sec On click sound NO mode Off thud sound NO mode 2 Zero Span Valve Should switch ON when CALZ or CALS button is pressed 3 Sample Cal Valve Should switch ON when CALS button is pressed 4 Pre reactor Valve ON when M200AU in Pre reactor mode Happens once every 6 NO NO cycles or about once per minute 5 Ozone Generator Power Ozone generator power is controlled by 1 Molybdenum converter temp 2 Time since last power up The ozone generator will be on if 1 Moly temp is lt 100 C and its been more than 30 min since power up 2 Moly temp between 100 250 C and its been more than 10 min since power up 3 Moly temp gt 250 6 Sample flow control block Should cycle ON OFF every 20 sec to 2 min On heater continuously until up to temp ys Converter Heater Should cycle ON OFF every 20 sec to 2 min On continuously until up to temp 8 Reaction Cell Heater Should cycle ON OFF every 20 sec to 2 min On continuously until up to temp 9 51 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 9 3 6 Ozone Generator CAUTION DANGER Lethal voltages present inside Ozone Generator Turn off instrument before servicing Unplug Generator before dis assembling The ozone generator subsystem consists of a permeation drier flowmeter power supply generator module and power switch The location of the components is illustrated in Figure 9
31. 6 6 efficiency setup and verification NO2 Expected NO concentration for 5 2 2 6 7 6 6 converter efficiency calculation CAL Automatic converter efficiency 5 2 2 6 7 6 6 calibration and entry SET Set the converter efficiency 5 2 2 6 7 6 6 manually MSG Displays warning messages 9 1 2 CLR Clears warning messages 9 1 2 SETUP The SETUP Menu See next Table 5 2 table 5 5 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 5 1 2 Set Up Menu Table 5 3 Setup Menu Setup Menu 1 Reference Level 1 Level 2 Level 3 Level 4 Description Section CFG CFG is primarily used for 5 3 1 showing special configuration options and factory special software PREV PREV NEXT can be used to 5 3 1 NEXT LIST scroll through the configuration list LIST automatically scrolls the list AUTOCAL Automatic span check or 5 3 2 6 4 calibration SEQUENCE Selects Sequence 5 3 2 6 4 PREV Scrolls display to select 5 3 2 6 4 NEXT calibration sequence 1 2 or 3 MODE Selects mode of calibration 5 3 2 6 4 zero span zero span plus disable SET For a given Sequence and 5 3 2 6 4 Mode sets timing and calibration attributes DAS Data Acquisition System 5 3 3 DAS keeps 1 to 1500 minute averages of data table continued 5 6 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Table 5 3 Setup Menu Continued
32. 7 Ozone is generated by drying ambient air passing the air between two electrodes that have a large oscillating electric field generated by a high voltage transformer Common faults in the ozone generator are 1 A leak or some other failure in the drier will let ambient air into the generator There is enough water vapor in room air to cause the generator to make nitric acid aerosol It is very corrosive and causes the generator cartridge to short out due to salt build up This reduces the ozone concentration generated which can cause the analyzer to be non linear due to insufficient ozone concentration 2 Contaminated ozone generator cartridge Salts and oxgenated hydrocarbons can be removed by rinsing with 10 nitric acid at 50 C followed by de ionized water rinse then dry air purge 3 Shorts open circuits arcing Because of the very high voltages the glass ozone generator cartridge may crack and cause an internal arc or short circuit Measure the voltage between TP 4 and TP 5 on the Ozone Generator Driver Board The voltage should be 0 045 005 VDC indicating that the drive current is about 45 A If the value is either zero or significantly greater than 0 45 the ozone generator is faulty 9 52 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev Table 9 11 Ozone Generator Control Conditions ae Condition Description 1 Manual override off SETUP
33. DCE DTE switch should fix the problem See the schematic and assembly drawings in the Appendix 9 37 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F A A gt lt N o o e e B Figure 9 3 RS 232 PIN Assignments 9 38 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 9 3 3 Voltage Frequency V F Board The V F Board consists of 16 analog input channels each software addressable 8 digital inputs and 24 digital outputs each line independently addressable and 4 independent analog output channels The analog input channels are connected to V F converter capable of 80 000 counts which is approximately 16 bit resolution The integration period is software selectable from 40msec to 2 4 sec Commands from the SBC40 computer and digitized values from the V F section of the board are sent via the STD bus interface The schematic for the board is in the Appendix The overall operation of this board is quite complex To fully check it out in all of its operational modes is not possible in the field Therefore a few simple tests are described here that test one analog input channel the 4 analog output channels one digital input and one digital output 1 V F board analog input test Each analog channel is routed through a programmable 16 channel multiplexer Chances are that if one channel works they all work A Turn on instrument B Press TEST key on fr
34. DCPS WARNING DC Voltage out of spec WOZONEGEN OZONE GEN OFF Ozone Generator is off WDYNZERO CANNOT DYN ZERO Dynamic zero cal out of spec WDYNSPAN CANNOT DYN SPAN Dynamic span cal out of spec WVFDET V F NOT DETECTED V F board not installed or broken 5 33 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Whenever a warning message is reported on the analyzer display ifthe RS 232 interface is in the normal mode i e not in quiet mode the warning message is also sent to the RS 232 interface These messages are helpful when trying to track down a problem with the analyzer and for determining whether or not the DAS reports are actually valid The warning message format is for example W 194 11 03 0200 SAMPLE FLOW WARN The format of a warning command is W command Examples of warning commands are W LIST List all current warnings W CLEAR ALL Clear all current Warnings Individual warnings may be cleared via the front panel or the command line interface To clear the sample flow warning shown above the command would be W WSAMPFLOW 5 5 5 CALIBRATION Commands and Messages There are several methods of both checking the calibration and calibrating the M200AU these are discussed in Section 7 The C command executes one of the calibration commands shown in Table 5 18 Table 5 18 RS 232 Calibration Commands Command Description C id ZERO 1 or 2 Start remote zero calibration The number is
35. Functions The calibration and zero span checking of the M200AU analyzer is treated in detail in Section 7 Table 7 1 summarizes types of calibration The basic function of each of these keys is described here When any of the CAL buttons are pressed or whenever the instrument enters the CAL mode the adaptive filter is activated This allows the instrument to respond rapidly to concentration changes regardless of their magnitude 5 2 2 1 CAL CALS CALZ These keys control the calibration functions of the analyzer In the CAL mode the analyzer can be calibrated without switching on the zero valve or the span valve If the analyzer has the Zero Span valve option there will be CALZ and CALS buttons also These buttons operate the Zero Span valves The setup of these options is covered in Section 6 3 and operation is explained in Section 7 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 5 2 2 2 Zero Pressing the ZERO key along with ENTR will cause the instrument to adjust the OFFSET value of the internal formula so that the instrument reads zero The M200AU allows zero adjustment over a limited range of signal levels therefore the signal does not have to be exactly zero for the instrument to do a zero cal The instrument will not however allow a zero cal on any signal level therefore it is not possible to zero the instrument with high concentrations of span gas in the reaction cell If the ZERO key does not come
36. Instruction Manual 02293 Rev 5 5 1 Setting Up the RS 232 Interface The baud rate is set from the front panel by SETUP MORE COMM BAUD Select the baud rate appropriate for your application 300 1200 2400 4800 9600 or 19 200 It is important to note that the other device must have identical settings in order for the communications to work correctly Second is physical wiring of the analyzer to the other unit We have incorporated into the Analyzer LED s that signal the presence of data on the communications lines and also switches to easily re configure the analyzer from DCE to DTE if necessary In addition the front panel diagnostics allow test data streams to be sent out of the port on command This flexibility and diagnostic capability should simplify attaching our equipment to other computers or printers If problems occur see the Troubleshooting Section 9 3 2 Setup from the Front Panel There are 2 additional RS 232 setups that can be done via the front panel 1 Set the instrument ID number by SETUP MORE COMM ID and enter a 4 digit number from 0000 9999 This ID number is part of every message transmitted from the port 2 Set the 5 232 mode bit field the VARS menu get to the variable press SETUP MORE VARS then ENTR and scroll to 232_ then press EDIT The possible values are in Table 5 10 Table 5 10 RS 232 Port Setup Front Panel Decimal Value Descript
37. M200AU returns to sample mode Immediately after calibration readings do not go into the DAS averages Refer to Table 7 3 to enter expected NO and NO values 7 6 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev Table 7 6 Manual Span Calibration Procedure Z S Valves Step Number Action Comment 1 Press CALS The M200AU enters the calibrate mode from sample mode This operates the sample cal and zero span valves to allow span gas to come in through the cal gas inlet port in the rear panel When the CALS button is pressed the adaptive filter is activated This allows the instrument to respond rapidly to concentration changes regardless of their magnitude 2 Wait 10 min Wait for reading to stabilize at span value 3 Press SPAN If you change your mind after pressing SPAN you can still press EXIT here without spanning the instrument 4 Press ENTR Pressing ENTR actually changes the calculation equations 5 Press EXIT M200AU returns to sampling Immediately after calibration data is not added to the DAS averages 7 3 Automatic Zero Span Check In a typical air monitoring application it is desirable to have the analyzer automatically check AUTOCAL its calibration each day If provided with the proper options the M200AU provides this capability by using the time of day clock to signal the computer system to check operations When enabled the instrument software wil
38. NOCONC NO xxxxx PPB Instantaneous NO concentration TESTCHAN TEST xxxxx MV Test channel diagnostic output CLOCKTIME TIME HH MM SS Time of day Displayed when independent range is enabled Displayed when single or auto range is enabled Depends on which units are currently selected 5 32 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev The T command lists TEST messages Examples ofthe T command are T LI TL ST IST ALL T CONVTEMP T L IST NOX T NOX Lists all active test messages Lists all test messages Prints the temperature of the moly converter Prints NO concentration message Prints NO concentration message 5 5 4 WARNING Commands and Messages Table 5 17 RS 232 Warning Messages Name Message Description WSYSRES SYSTEM RESET Analyzer was reset powered on WRAMINIT RAM INITIALIZED RAM was erased WSAMPFLOW SAMPLE FLOW WARN Sample flow out of spec WOZONEFLOW OZONE FLOW WARNING Ozone flow out of spec WRCELLPRESS RCELL PRESS WARN Rx cell pressure out of spec WBOXTEMP BOX TEMP WARNING Box temp out of spec WRCELLTEMP RCELL TEMP WARNING Reaction cell temp out of spec WCONVTEMP MOLY TEMP WARNING Molycon temp out of spec WPMTTEMP PMT TEMP WARNING Molycon temp out of spec WPREREACT PRACT WARN XXX X MV Pre reactor filter receive a reading out of limit spec WHVPS HVPS WARNING High voltage out of spec WDCPS
39. Subsection 2 3 2 Handbook Flow settings used in the GPT calibration for must be determined as illustrated in Section 7 6 4 this manual The user should be sure that all flow meters are calibrated under the conditions of use against a reliable standard All volumetric flow rates should be corrected to 25 C 78 F and 760 mm 29 92 in Hg Calibrations of flow meters are discussed in TAD Gas Phase Titration GPT requires the use of the NO channel of the analyzer to determine the amount of NO generated by titration Therefore 1t is necessary to calibrate and determine the linearity of the NO channel before proceeding with the NO calibration It is also necessary to calibrate the NO channel This can be done simultaneously with the NO calibration During the calibration the M200AU should be operating in its normal sampling mode and the test atmosphere should pass through all filters serubbers conditioners and other components used during normal ambient sampling and as much of the ambient air inlet system as is practicable All operational adjustments to the M200AU should be completed prior to the calibration The following software features must be set into the desired state before calibration 7 16 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Automatic Converter Efficiency compensation See Sections 7 6 6 this manual Independent range selection See Sections 5 3 4 and 7 7 this manual
40. Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev The analog voltage output should measure 80 of the voltage range selected e g 4 00VDC if 0 5V output is selected The readings on the front panel display should be equal to the expected NO and NO concentrations entered in the procedure given in Table 7 13 See the Troubleshooting Section 9 2 8 if there are problems Also see the Calibration Quality Check procedure Section 7 8 After the zero and the 80 URL points have been set generate five approximately evenly spaced calibration points between zero and 80 URL without further adjustment to the instrument Allow the instrument to sample these intermediate concentrations for about 10 minutes each and record the instrument NO and NO responses Plot the analyzer NO and NO responses versus the corresponding calculated concentrations to obtain the calibration relationships Determine the straight line of best fit y mx b determined by the method of least squares After the best fit line has been drawn for the NO and the NO calibrations determine whether the analyzer response is linear To be considered linear no calibration point should differ from the best fit line by more than 2 of full scale 7 6 5 3 GPT NO Calibration Procedure The M200AU computes the NO concentration by subtracting the NO from the NOx concentration Unlike analog instruments this difference is calculated by the M200AU s internal
41. Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 7 9 References 1 Environmental Protection Agency Title 40 Code of Federal Regulations Part 50 Appendix F Measurement Principle and Calibration Procedure for the Measurement of Nitrogen Dioxide in the Atmosphere Gas Phase Chemiluminescence Federal Register 41 232 pp 52688 52692 December 1976 Ellis Elizabeth C Technical Assistance Document for the Chemiluminescence Measurement of Nitrogen Dioxide U S Environmental Protection Agency Research Triangle Park NC October 1976 91 p Quality Assurance Requirements for State and Local Air Monitoring Stations SLAMS Appendix A Federal Register Vol 44 No 92 pp 27574 27582 May 1979 Catalog of NBS Standard Reference Materials NBS Special Publication 260 1975 76 Edition U S Department of Commerce NBS Washington D C June 1975 Quality Assurance Handbook for Air Pollution Measurement Systems Volume I Principles EPAN 600 9 76 005 December 1984 Quality Assurance Handbook for Air Pollution Measurement Systems Volume II Ambient Air Specific Methods EPA 600 4 77 027a December 1986 Quality Assurance Requirements for Prevention of Significant Deterioration PSD Air Monitoring Appendix B Federal Register Vol 44 No 92 pp 27582 27584 May 1979 7 35 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F INTENTIONALLY BLANK 7 36 Teledyne API Model
42. The three results NO NOx and NO are then further processed and stored by the computer yielding several instantaneous and long term averages of all three components The software uses an adaptive filter to accommodate rapid changes in concentration The algorithm monitors the rate of change in concentration for both the NO and NO channels When a change in concentration is detected the software changes the sample filters to rapidly respond to the change The filters are adjusted to minimize the errors introduced by the time delay between the NO and NO channel measurements this assures accurate measurements When the rate of change decreases the filters are lengthened to provide better signal noise ratio The parameters used to operate the adaptive filter have been tuned to match the electrical and pneumatic characteristics of the M200AU Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F e Figure 4 1 Block Diagram 4 2 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 4 2 Operation Summary 4 2 1 Sensor Module Reaction Cell Detector The sensor module Figure 9 9 is where light from the chemilumenescent reaction is generated and detected It is the most complicated and critical sub assembly in the entire analyzer It consists of the following assemblies and functions 1 The reaction cell and flow control module 2 Reaction cell heater t
43. Titration GPT Gas Phase Titration GPT with serial dilution is recommended for checking the converter efficiency and NO channel linearity of the M200AU Those using a permeation tube should refer to TAD The principle of GPT is based on the rapid gas phase reaction between NO and O which produces stoichiometric quantities of NO as shown by the following equation NO gt NO Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Given that the NO concentration is known for this reaction the resultant concentration of can be determined Ozone is added to excess NO in a dynamic calibration system and the NO channel of the chemiluminescent analyzer detects the changes in NO concentration After the addition of the observed decrease in NO concentration on the calibrated NO channel is equivalent to the concentration of NO produced The amount of NO generated may be varied by adding varying amounts of O from a stable O generator All zero air used in this procedure should conform to the requirements stated in Section 7 Dynamic calibration systems based on this principle are commercially available such as the Teledyne API Model 700 Calibrator or may be assembled by the user A recommended calibration system is described in the Federal Register and detailed in TAD 7 6 4 2 GPT Calibrator Check Procedure It has been determined empirically that the NO O reaction goes
44. Z S Check or Calibration This calibration option uses calibration gas through the sample port coming in through the sample port Zero Span valves do not operate 42 Manual Z S Check or Calibration with How to operate Zero Span Valves Option Can be Z S Valves Option used to check or adjust calibration 7 3 Automatic Z S Check with Z S Valves Operates Z S valves once per day to check the calibration 7 4 Dynamic 7 5 Calibration with 7 5 Operates Z S valves once per day and adjusts Valves calibration 7 5 Use of Z S Valves with Remote Operates Z S valves with rear panel contact Contact Closure closures Without valves can be used to switch instrument into zero or span cal mode Used for either checking or adjusting zero span 7 6 EPA Protocol Calibration Covers methods to be used if data is for EPA equivalency monitoring 7 7 Special Calibration Requirements for Covers special requirements if using Independent Independent Ranges or AutoRanging Range or AutoRange 7 8 Calibration Quality Information on how to determine if the calibration performed will result in optimum instrument performance 7 9 References Contains a list of references on quality control and calibration 7 2 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Figure 7 1 Calibration Setup 7 3 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 7 1 Manual Zero Span Check or Cal with Zero Span Gas in the
45. as Scott Specialty Gases Scott Marin etc 7 6 12 Certification Procedures of Working Standards The NO content ofthe NO working standard must be periodically assayed against NIST traceable NO or NO standards Any NO impurity in the cylinder must also be assayed Certification of the NO working standard should be made on a quarterly basis or more frequently as required Procedures are outlined below for certification against NO traceable standard The simplest and most straightforward procedure is to certify against a NO standard NOTE If the assayed concentration of NO impurity in the NO cylinder NOz imp is greater than the 1 ppm value allowed in the calibration procedure make certain that the NO delivery system is not the source of contamination before discarding the NO standard 7 31 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev 7 6 12 1 NO Working Standard Traced to NIST NO Standard First use the NIST traceable NO standard and the GPT calibration procedure to calibrate the NO NO and NO responses of the analyzer Also determine the efficiency of the Molycon Refer to the calibration procedure described in Section 7 6 4 2 Then generate several NO concentrations by diluting the NO working standard Use the nominal NO cylinder concentration NO nom to calculate the diluted concentrations Plot the analyzer NO response in ppm versus the nominal diluted NO concentration and d
46. autorange mode Logic Low M200AU in low range of autorange mode 24 PMT_SIGNAL NO Current PMT voltage Same as PMT voltage in TEST menu Bi polar typically in 0 5000 mV range A constant value of 5000 mV indicates offscale 25 SAMPLE PRES NO Sample pressure in mV Typical sea level value 4300 mV for 29 9 Hg A 26 RCELL TEMP NO Reaction Cell temperature Typically 3500 mV for 50 C 27 BOX_TEMP NO Box Temperature Typically 1800 mV for 25 C 28 BLOCK_TEMP NO Block temperature 29 PMT TEMP NO PMT cold block temperature Typically 3600 mV for 10 C 30 DCPS VOLTAGE NO DC power supply composite voltage output Typically 2500 mV 31 RCELL PRESS NO Reaction Cell Pressure in mV Typically 1270 mV for 5 Hg A at sea level Is an absolute pressure so higher values means higher absolute pressures 32 OZONE_FLOW NO Ozone flowmeter voltage Typically 2000 mV at 80 cc min 33 CONV_TEMP NO Molybdenum Converter temp Typically 3150 mV at 315 34 HVPS_VOLTAGE NO HVPS programming voltage Output of HVPS is 1000x value present 700 mV 700 VDC output 35 DAC CHAN 0 NO Output of NO channel in mV 36 DAC CHAN I NO Output of NO channel in mV table continued 9 15 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Table 9 4 Diagnostic Mode Signal I O Continued 37 DAC CHAN 2 NO Output of NO channel in mV 38 DAC CHAN 3 NO Test Channel output 39 NOX_CONC YES NO DAC programming voltage The
47. by the user Span concentrations for both levels should be between 70 and 90 of the measurement range Zero and span data are to be used to 1 Provide data to allow analyzer adjustment for zero and span drift 2 Provide a decision point on when to calibrate the analyzer 3 Provide a decision point on invalidation of monitoring data Items 1 and 2 are described in detail in Subsection 9 1 3 of Section 2 0 9 Q A Handbook Item 3 is described in Subsection 9 1 4 ofthe same section Refer to the Troubleshooting Section 9 of this manual if the instrument is not within the allowed variations 7 6 10 1 Zero Span Check Procedures The Zero and Span calibration can be checked a variety of different ways They include 1 Manual Zero Span Check Zero and Span can be checked from the front panel keyboard The procedure is in Section 7 1 of this manual 2 Automatic Zero Span Checks After the appropriate setup Z S checks can be performed automatically every night See Table 6 2 and Section 7 3 of this manual for setup and operation procedures 3 Zero Span checks via remote contact closure Zero Span checks can be initiated via remote contact closures on the rear panel See Section 7 5 ofthis manual 4 Zero Span via RS 232 port Z S checks can be controlled via the RS 232 port See Section 5 5 of this manual for more details 7 29 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev 7 6 10 2 Precision Check
48. coupled NPN transistors which can pass 50 ma max of direct current with a voltage of 30 VDC max The input lines are optically coupled with inputs pulled up to 5 VDC External contacts can be contact closures or open collector transistor contacts DO NOT apply any voltage since 5 VDC is supplied internally Individual status lines can be set or cleared using the DIAGNOSTIC mode SIGNAL VO This can be useful for simulating fault conditions in the analyzer to see if external circuitry is working correctly See Table 5 9 for pin assignments 9 3 4 4 4 20 mA Current Output 4 20 mA current loop option replaces the voltage output of the instrument with an isolated 4 20 mA current output The current outputs come out on the same terminals that were used for voltage outputs see Figure 2 2 It is programmable for 4 20mA or 0 20mA and has a 1500 V common mode voltage isolation and 240 V RMS normal mode voltage protection Vioop 28V max which is sufficient to drive up to a 1000 ohm load 9 3 5 Power Supply Module The Power Supply Module consists of several subassemblies described in Table 9 9 9 47 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev Table 9 9 Power Supply Module Subassemblies Module Description Linear Power Supply Board The linear power supply board takes multiple voltage inputs from the power transformer and produces 5 15 15 12 VDC outputs The outputs are routed to two ex
49. in Teledyne APT s discretion repairing or replacing such defective Product or refunding the purchase price of such Product The warranties set forth in this section shall be of no force or effect with respect to any Product 1 that has been altered or subjected to misuse negligence or accident or 11 that has been used in any manner other than in accordance with the instruction provided by Teledyne API or iii not properly maintained THE WARRANTIES SET FORTH IN THIS SECTION AND THE REMEDIES THEREFORE ARE EXCLUSIVE AND IN LIEU OF ANY IMPLIED WARRANTIES OF MERCHANTABILITY FITNESS FOR PARTICULAR PURPOSE OR OTHER WARRANTY OF QUALITY WHETHER EXPRESSED OR IMPLIED THE REMEDIES SET FORTH IN THIS SECTION ARE THE EXCLUSIVE REMEDIES FOR BREACH OF ANY WARRANTY CONTAINED HEREIN TELEDYNE API SHALL NOT BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF OR RELATED TO THIS AGREEMENT OF TELEDYNE API S PERFORMANCE HEREUNDER WHETHER FOR BREACH OF WARRANTY OR OTHERWISE Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F TERMS AND CONDITIONS All units or components returned to Teledyne API should be properly packed for handling and returned freight prepaid to the nearest designated Service Center After the repair the equipment will be returned freight prepaid Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 4 THE M200AU NO ANALYZER 4 1 Principle of Operation The Teledyne A
50. it was intended unpredictable behavior could ensue with possible hazardous consequences Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F TABLE OF CONTENTS SAFE MESSAGES repita da A een ee Il TABLE OF GONTENTS 2 22 42 a2 en LIST OF FIGURES esse 2a VII LIST OF TABLES are VIII 1 HOW TO USE THIS MANUAL 1 1 2ZOETTING STARTED Ze sense ea engen 2 1 DA UNPACKING adc ete teca aote redo a dedo cds n od t cl toasts 2 1 2 2 ELECTRICAL AND PNEUMATIC CONNECTIONS 2 1 2 3 INITIAL OPERATION ota ee aa 2 6 3 SPECIFICATIONS AGENCY APPROVALS WARRANTY 3 1 3 1 SPECIFICATIONS P 3 1 2 2 EPA EQUIVALENCY DESIGNATION sic 3 2 Sd WARRANTY troll A AN A lia 3 3 4 THE M200AU ANALYZER iii 4 1 4 1 PRINCIPLE OF OPERATION ut ile nt 4 1 4 2 OPERATION SUMMARY 2 near aneinander 4 3 4 2 1 Sensor Module Reaction Cell 4 3 4 22 Pneumatic SENSOR Board use ea 4 3 4 2 3 Computer Hardware and Software 4 4 4 2 AN BORA AAA 4 4 ALO Front Parola selle e 4 5 4 2 0 aaa 4 7 4 2 7 Pump Valves Pneumatic System 4 7 4 2 8 Ozone Generaldl esie lira 4 7 4 2 9 Molybdenum Converter Ozone Scrubber
51. messages for use as an audit trail is one of the two principal uses for the RS 232 interface You can effectively disable the asynchronous reporting feature by setting the interface to quiet mode All messages output from the analyzer including those output in response to a command line request have the format X DDD HH MM MESSAGE X is a character indicating the message type as shown in the table below DDD HH MM is a time stamp indicating the day of year DDD as a number from 1 to 366 the hour of the day HH as a number from 00 to 23 and the minute MM as a number from 00 to 39 is the 4 digit machine ID number MESSAGE contains warning messages test measurements DAS reports variable values etc The uniform nature of the output messages makes it easy for a host computer to parse them 5 30 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev Table 5 15 RS 232 Interface Command Types First Character Message Type C Calibration D Diagnostic T Test measurement V Variable W Warning There are 5 different types of messages output by the M200AU They are grouped below by type in Table 5 13 to Table 5 21 The meanings of the various messages are discussed elsewhere in the manual The TEST DIAGNOSTIC and WARNING messages are discussed in Sections 9 1 and 9 2 DAS and VARIABLES are discussed in Section 5 3 5 and 5 3 9 CALIBRATE is
52. optional and selects the range to calibrate If not specified the range defaults to range 1 C id COMPUTE ZERO Tells the instrument to compute a new slope and offset Same as pressing ZERO ENTR on front panel C id SPAN 1 or 2 Start remote span calibration C id COMPUTE SPAN Tells the instrument to compute a new slope and offset Same as pressing SPAN ENTR on front panel C id ASEQ number Executes automatic calibration sequence 1 2 or 3 C id EXIT Exits the current calibration step and goes to the next one C id ABORT Aborts the entire calibration sequence 5 34 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Table 5 19 RS 232 Calibration Examples Action RS 232 Commands Comments Zero Calibration C ZERO Z S valves switched to admit C COMPUTE ZERO zero gas Zero cal in Single C EXIT Range mode Zero Calibration of low range C ZERO 1 Z S valves switched to admit AutoRange Enabled C COMPUTE ZERO Zero gas Zero calibration of C EXIT low range in Auto Range mode Span Calibration of high range C SPAN 2 Z S valves switched to admit AutoRange Enabled C COMPUTE SPAN span gas Span calibration of C EXIT high range in Auto Range mode Zero Calibration with Dynamic C ZERO Z S valves switched to admit Calibration enabled C EXIT Zero gas Instrument is zero calibrated 1f DYN CAL is enabled Zero Calibration C ZERO Z S valves switched to
53. should be cleaned with methanol and a clean tissue and dried 8 Normally it is not necessary to clean the sample and ozone flow orifices since they are protected by sintered SS filters If tests shows that cleaning is necessary then do the following A The manifold O rings springs sintered SS filters and orifices should be removed before cleaning It is suggested that the orifice filter and o rings be replaced unless an ultrasonic cleaner and methanol or methylene chloride is available Both orifice and sintered filter may be cleaned with an ultrasonic bath for 30 minutes in either solvent B After cleaning with solvent flush copiously with tap waster C Now rinse parts in either DI or distilled water D Dry parts prior to re installation 9 Do not remove the sample and ozone nozzles They are Teflon threaded and require a special tool for re assembly If necessary the manifold with nozzles attached can be cleaned in an ultrasonic bath 10 Reassemble in proper order and re attach onto sensor housing Reconnect pneumatics and heater connections then re attach the pneumatic sensor assembly and the cleaning procedure is complete 11 After cleaning the analyzer span response may drop 10 12 in the first 1 2 days as the reaction cell window conditions Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F A n 2 A 7 Va Wy 4 2 2 A A Y Lemmy A A Zn 7 Yt 5 N
54. socket Analyzer must have 3 wire safety power input 3 Check circuit breaker Circuit breaker is part of the front panel power switch It is set each time the instrument power is turned on If there is an internal short causing a trip the switch will automatically return to the OFF position when an attempt is made to turn it on 9 26 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 9 2 2 Flow Check 1 Check TEST function RCEL this is absolute pressure in the reaction cell It should be 1 4 in Hg A Check that pump is running Check RCEL TEST function for proper pressure Check that pump tubing is connected to rear of analyzer Test that the pump is producing vacuum by removing fitting at rear of analyzer and checking for suction at fitting Check for flow upstream of the sample flow orifice and ozone orifice on the valve assembly A Remove the 1 8 fitting that carries sample Plug the fitting on the sample flow block with your finger and note the vacuum produced B Remove the ozone fitting also and compare relative flow rates Sample should be much higher 1000 cc min than ozone 80 cc min Check for broken flow or pressure sensor Leak check the analyzer See Section 8 7 for leak check procedure 9 2 3 No Response to Sample Gas 1 4 di Confirm correct operation of analog output by performing Analog Output Step Test in Section 9 1 3 5 Confirm general operati
55. test The digital I O section of the V F board has 8 input bits and 24 output bits Two of the 8 input bits are assigned as calibration controls See Section 7 5 for information on calibration using external contact closures To test the digital inputs A Turn on the M200AU B Connect a jumper wire across pins 1 and 2 of the rear panel connector as shown in Figure 2 2 C Shortly after closure is made the instrument should switch into zero mode as indicated on the front panel display D Remove the jumper 6 Digital output channel test There are 24 output bits on the V F board The 24 bits are made up of 3 8 bit ports It is possible for a single 8 bit port or even a single bit within a port to fail A quick observational test of the digital outputs is to observe the LED s in the Power Supply Module Refer to Figure 9 5 for the location of the LED s in the PSM The state of the LED s can be checked from Table 4 1 The comments section assumes the M200AU has been running for at least 45 minutes A more detailed test is in the DIAGNOSTIC menu See Diagnostic tests in Section 9 1 3 9 40 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev 9 3 3 1 ADC DAC Calibration Procedure Due to the stability of modern electronics this procedure should only need to be performed if a major sub assembly is exchanged or when the display voltage does not match the input voltage or current to the V F card After completion
56. the actual dynamic calibration procedure Table 7 9 Activity Matrix for Calibration Equipment and Supplies and manifold glass or stainless steel Equipment erence Frequency Method Action If Requirements Supplies Of Measurement Are Not Met Recorder Compatible with output Check upon receipt Return equimpent to signal of analyzer min supplier chart width of 150 mm 6 in is recommended Sample line Constructed of PTFE Check upon receipt Return equipment to supplier standards Calibration Meets guide line reference See Section 2 3 9 Return equipment supplies equipment 1 and Section 2 3 2 Q A Handbook to supplier or take corrective Handbook action Working Traceable to NIST SRM Analyzed against NIST Obtain new working standard NO Meets limits in traceability SRM see protocol in standard and check for cylinder gas or protocol for accuracy and Section 2 0 7 Q A traceability NO stability Section 2 0 7 Q Handbook permeation A Handbook tube Recording Develop standard forms N A Revise forms as appropriate forms Audit Must not be the same as System must be checked Locate problem and correct equipment used for calibration out against known or return to supplier Calibrations should be carried out at the field monitoring site The Analyzer should be in operation for at least several hours preferably overnight before calibration so that it
57. the time of the measurement and 2 the systematic errors when combined with the random variation in the measurement process must result in a suitably small uncertainty Evidence of good quality data includes documentation of the quality control checks and the independent audits of the measurement process by recording data on specific forms or on a quality control chart and by using materials instruments and measurement procedures that can be traced to appropriate standards of reference To establish traceability data must be obtained routinely by repeated measurements of standard reference samples primary secondary and or working standards More specifically working calibration standards must be traceable to standards of higher accuracy such as those listed below in Table 7 17 7 30 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Table 7 17 NIST SRM s Available for Traceability of Calibration and Audit Gas Standards NIST SRM Type Size at STP Ns i Concentration 1683a Nitric oxide in 870 50 ppm 1684a Nitric oxide 870 100 ppm 1685a Nitric oxide 870 250 ppm Permeation Tubes Permeation rate ppm NIST SRM Type a at flow rates of 5 1 L min 5 L min 1629 Nitrogen dioxide 1 0 0 5 0 1 Cylinders of working gas traceable to NIST SRM s called EPA Protocol Calibration Gas are also commercially available from sources such
58. thus producing a negative reading High Pre reactor readings can be caused by A Leaking Pre reactor valve B Electronic fault in the preamp causing it to have a voltage on the PMT output pin during the Pre reactor cycle Area around the high impedance section of the preamp contains conductive dirt C Reaction cell contamination causing high background gt 40 mV light readings D Broken PMT temperature control circuit or broken PMT cooler power supply allowing high zero offset After fixing the cause of the high Pre reactor filter readings the M200AU will take 15 minutes for the filter to clear itself Check for leaks 9 2 5 Excessive Noise Common reasons for excessive noise are 1 Zi 3 4 Leak in pneumatic system Light leak check the sensor module with strong light HVPS noisy see HVPS test procedure See Section 9 3 8 5 Defective electronic components on preamp board use optic test and electric test to check electronics optics and observe noise Contamination of ozone generator and or reaction cell This can be wet air or impurities This can be detected by high PMT readings with zero air as sample gas Verify this condition by turning off the ozone generator using the DIAG mode command and observing a drop in PMT reading of more than 50 mV or 25 ppb Ifthe ozone generator or reaction cell is contaminated disassemble and clean 9 28 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 R
59. to completion 196 residual O3 if the NO concentration in the reaction chamber ppm multiplied by the residence time min of the reactants in the chamber is 22 75 ppm min The theory behind the development of this equation is in the Federal Register and in TAD It is currently not known whether this relationship holds up at the extremely low concentrations of which the M200AU is capable We therefore recommend that the GPT procedure be carried out at the normal flow rate and concentrations encountered in ambient air monitoring then performing a serial dilution of the resultant gas stream to get the low concentration values The following procedures and equations should be used to determine whether an existing GPT calibration system will meet required conditions for a specific calibration For calibrators that have known pre set flow rates use equations 7 5 and 7 6 of steps 7 and 8 below to verify the required conditions If the calibrator does not meet specifications follow the complete procedure to determine what flow modifications must be made l Select a NO standard gas that has a nominal concentration in the range of 50 to 100 ppm Determine the exact concentration NO stp by referencing against an NIST SRM as discussed in Section 2 0 7 Q A Handbook 2 Determine the volume cm of the calibrator reaction chamber If the actual volume is not known estimate the volume by measuring the approximate dimensions of the
60. voltage is 800 mV Asan alternate method the voltage can be determined from the graph in Figure 9 1 On the Y axis find the calibration concentration in ppb then determine the expected voltage from the X axis Adjust S2 the HVPS coarse adjustment on the preamp board to the setting that produces a signal that is closest to 800 mV Adjust S1 the HVPS fine adjustment to the setting that produces a signal that is closest to 800 mV Use R19 to trim the reading to 800 50 mV The readings will periodically go to zero as the Pre reactor circuit operates ignore the zero readings Allow the instrument to sample span gas for 30 minutes Then do a span calibration by CAL SPAN ENTR After the span is completed do the span quality check procedure in Table 7 18 This procedure is extremely important to assure that the instrument will operate with optimum noise linearity and dynamic range Electric Test ET Procedure To adjust ET press SETUP MORE DIAG then scroll to ELEC TEST and press ENTR Scroll the TEST functions until PMT is displayed Adjust R27 until 2000 mV 200 is displayed Press EXIT to return to SAMPLE mode Optic Test OT Procedure To adjust OT press SETUP MORE DIAG then scroll to OPTIC TEST and press ENTR Scroll the TEST functions until PMT is displayed Adjust R25 until 2000 mV 250 is displayed D Press EXIT to return to SAMPLE mode J awp gt If this procedure does not produce an instrument that will
61. 00AU NOx Analyzer Instruction Manual 02293 Rev F 9 TROUBLESHOOTING ADJUSTMENTS NOTE The operations outlined in this chapter are to be performed by qualified maintenance personnel only This section of the manual contains information on diagnosing and repairing instrument performance problems It contains information on how to use and interpret TEST and DIAGNOSTIC data as well as WARNING messages the instrument generates There is information on how to troubleshoot the instrument subsystems Finally there is information to perform adjustments such as DAC calibration procedures This manual provides troubleshooting procedures that address problems to the board level For component level troubleshooting consult the schematics for the appropriate board in the Appendix NOTE The values of the readings shown on the front panel of the instrument may at times read XXXXXX This means that the reading is off scale and therefore meaningless General Troubleshooting Hints 1 If the fault light is and it stays on after you clear the warning messages see Section 9 12 2 Think of the analyzer as three sections Section 1 Pneumatics Over 50 of all analyzer problems are traced to leaks in the pump assembly sample filter instrument internal pneumatics calibrator or external sample handling equipment Suspect a leak first and refer to Section 8 7 Section 2 Electronics data processing section Thi
62. 00AU s pump plus a shut off valve 1 Turn off instrument power and pump power 2 Cap the sample inlet port ozone generator air inlet and zero air inlet if Z S valve option present 3 Insert a shut off valve between the sample pump and the vacuum manifold at the rear of the instrument 4 Turn on the sample pump and set the TEST function to RCEL which measures the reaction cell pressure Close the shutoff valve and monitor the cell pressure The pressure should not drop more than 1 Hg 0 5psi in 5 minutes If there is a leak it is not possible by this method to tell where it is located You can locate the leak by using a pressure leak checker described below 5 The sensor module is equipped with a fitting at the top of housing near the heat sink fins This fitting can be pressurized and the sensor checked for leaks The leak down rate is the same as above If you have a leak checker 1 Turn off instrument power and pump power 2 Disconnect pump at rear panel Cap the sample inlet port ozone generator air inlet and zero air inlet if Z S valve option present and connect the leak checker to the exhaust port CAUTION Pressure must be less than 15 psi 8 15 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 8 8 8 9 3 Pressurize system and check for leaks by watching overall pressure The pressure should not drop more than 1 Hg 0 5psi in 5 minutes If the instrumen
63. 0AU NOx Analyzer Instruction Manual 02293 Rev F 7 7 2 Span Calibration with AutoRange or Independent Range Observe the following guidelines when calibrating in AutoRange or Independent Range 1 When doing a span calibration of the M200AU use 80 of the highest of the ranges This will result in the most accurate calibration 2 When selecting concentrations for the NO NO or NO GPT dynamic calibrations use 80 of the highest AutoRange or the highest Independent Range This will produce the most accurate calibration 3 Ifthe calibration data is obtained from RS 232 port or from the front panel display no special changes are necessary if the instrument is in AutoRange or Indep Range This is because the internal hardware and software has sufficient dynamic range to cover the entire EPA equivalent range also those features only affect the analog outputs 4 If using the analog outputs and a chart recorder or datalogger be sure to note when AutoRange occurs so that the correct concentration values are used With Independent Ranges change the ranges so that all ranges are equal to the highest range so that all calibration data is on scale 5 Calibration curves or relationships should be obtained for each range used 7 8 Calibration Quality After calibration is complete it is very important to check the QUALITY of the calibration The calibration of the M200AU involves balancing several sections of electronics and software
64. 1 7 8 TABLE 7 8 Z S VALVES MODES WITH REMOTE CONTACT 7 9 TABLE 7 9 ACTIVITY MATRIX FOR CALIBRATION EQUIPMENT AND SUPPLIES 7 10 TABLE 7 10 ACTIVITY MATRIX FOR CALIBRATION 7 11 TABLE 7 11 ZERO CALIBRATION PROCEDURE 1 7 19 TABLE 7 12 EXPECTED SPAN GAS CONCENTRATION 7 20 viii Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 TABLE 7 13 SPAN CALIBRATION nennen nunnana runnen 7 20 TABLE 7 14 AUTOMATIC CALCULATION OF CONVERTER EFFICIENCY 7 24 TABLE 7 15 DEFINITION OF LEVEL 1 AND LEVEL 2 ZERO AND SPAN CHECKS 7 26 TABLE 7 16 ACTIVITY MATRIX FOR DATA QUALITY e 7 28 TABLE 7 17 NIST SRM s AVAILABLE FOR TRACEABILITY OF CALIBRATION AND AUDIT GAS STANDARDS DTP piave dle rele we N le dre o BE o Be u erh 7 31 TABLE 7 18 CALIBRATION QUALITY CHECK e 7 34 TABLE 8 1 PREVENTATIVE MAINTENANCE
65. 1 4 above is covered in the Factory Calibration procedure in Section 9 1 6 Item 5 has no adjustable features 9 60 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F ER Figure 9 11 PMT Cooler Subsystem 9 61 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev 9 3 8 4 PMT Cooler The PMT cooler uses a Peltier cooler supplied with DC current from the switching power supply in the Power Supply Module An overall view is shown in Figure 9 9 A proportional temperature controller located on the Preamp board controls the temperature Voltages applied to the cooler element vary from 1 to 12 VDC The input voltage from the supply is 15 VDC The actual 5 C setpoint will vary 1 C due to component tolerances The temperature will be maintained within 0 1 C about the setpoint If the temperature fails to drop after a few minutes there is a problem in the cooler circuit If the control circuit on the Preamp card is faulty a temperature of 10 C is reported 9 3 8 5 High Voltage P S The HVPS is located in the interior of the Sensor Module and is plugged into the PMT tube It requires 2 voltage inputs The first is 15 VDC which powers the supply The second is the programming voltage which is generated on the Preamp Board This power supply is unlike a traditional PMT HVPS It is like having 10 independent power supplies one to each pin of the PMT The test procedure below allo
66. 10 of the full scale flow on either flowmeter you may need to purchase lower concentration standards 4 The standard gasses may be mis labeled as to type or concentration Labeled concentrations may be outside the certified tolerance 5 Contamination in sample delivery system A Dirt in sample lines or reaction cell w Contaminated cal gas source NO in NO cal gas is common C Dilution air contains sample or span gas 9 31 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 6 Ozone concentration too low A Wet air in ozone generator need to flush out clean dry B Ozone generator driver board failure C Damaged transformer ozone generator cartridge The ozone generator cartridge is partially made of glass Extreme physical shock such as dropping the generator on the floor may cause the glass cartridge to crack and eventually fail Sample inlet vent line too short should be at least 15 7 Sample exhaust not properly vented creating a backpressure at the sample inlet port of the instrument See Figure 2 3 for venting recommendations 9 2 11 Slow Response 1 Contaminated or dirty sample delivery pneumatics A Dirty plugged sample filter or sample lines B Dirty reaction cell 2 Sample inlet line too long Wrong materials in contact with sample use glass stainless steel or Teflon B Sample vent line located too far from instrument sample inlet Locate sample inlet vent near anal
67. 2 Key in expected Enter the expected cal gas concentration We suggest you NO concentration generate a NO concentration of 80 of current range Then ENTR 3 Press Reset the previous converter efficiency value to 1 00 CAL CONC MOLY SET Set CE to 1 0000 4 Press Allow the concentration reading to stabilize It may take CAL CONC time for the ENTR button to appear because the only valid CONV CAL wait values for CE are 96 to 1 02 The ENTR button will not come 10 min Then press on unless the value is in this range ENTR When ENTR is pressed the M200AU will compute the ratio of observed NO concentration to expected NO concentration and store the ratio 5 Press SET After the instrument calculates the CE it is good practice to check the ratio 6 Press EXIT The M200AU will now compensate all readings for this converter efficiency value 7 24 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 7 6 7 Calibration Frequency To ensure accurate measurements ofthe NO NO and NO concentrations calibrate the analyzer at the time of installation and re calibrate it 1 No later than three months after the most recent calibration or performance audit which indicated analyzer calibration to be acceptable An interruption of more than a few days in analyzer operation Any repairs which might affect its calibration Physical relocation of the analyzer Sg 2277259 Any other indicatio
68. 2 0 7 Subsec 7 1 generation system Q A Handbook Multi point tr lt 2 minutes Pr gt Method Adjust flow conditions calibration 2 75 ppm min 1 Sect 7 6 4 this and or reaction chamber GPT volume to meet Use calibration manual suggested limits Repeat the calibration Replace or service the converter 7 6 2 Calibration Gas and Zero Air Sources Production of Zero Air Due to the high sensitivity of the M200AU special care must be taken to assure that the zero air has extremely low levels of pollutants We recommend using Ultra Zero Air which is commonly used for gas chromatographic applications If other zero air sources are used the NO concentration should be lt 1 ppt 0 001 ppb and the concentration of interferent gasses should be lt 1 ppt 0 001 ppb for the sum total of all interferents Devices that condition ambient air by drying and removal of pollutants are available on the commercial market such as the Teledyne API Model 701 Zero Air Module We recommend this type of device for generating zero air Detailed procedures for generating zero air are in TAD Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev Selection of NO span gas standards The NIST SRM s provide references against which all calibration gas mixtures must be compared Section 2 0 7 Q A Handbook The procedure requires the comparison of the concentration of a commercial working calibration standard to an NI
69. 4900 2 FL0000003 Filter DFU 036 040180 1 HW0000020 Spring Flow Control 2 OR0000001 O Ring Flow Control 4 10 3 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F INTENTIONALLY BLANK 10 4 Teledyne API Model 200AU NO Analyzer Instruction Manual 02293 Rev F APPENDIX A ELECTRICAL SCHEMATICS Table A 1 Electrical Schematics table continued 0113912 PSM Overall schematic CE Mark A 1 Teledyne API Model 200AU NO Analyzer Instruction Manual 02293 Rev F Table A 1 Electrical Schematics Continued A 2
70. 50 Hz 2 5A 125 watts 230V 50 Hz 2 5A 110V 60 Hz 220V 50 Hz 240V 50Hz 150 watts 230V 50 Hz 22A Installation Category Over voltage Category II Pollution Degree 2 100 mV 1 5 10V isolated or non isolated current loop 1 part in 1024 of selected voltage or current range 12 Status Outputs from opto isolator ppb ug m 3 1 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 3 2 EPA Equivalency Designation Teledyne Instruments Advanced Pollution Instrumentation Division Model 200AU High Sensitivity Nitrogen Oxides Analyzer is designated as Reference Method Number RFNA 1194 099 as defined in 40 CFR Part 53 when operated under the following conditions 1 Range Any range from 50 parts per billion ppb to 1 ppm 2 Ambient temperature range of 20 to 30 C 3 Line voltage range of 105 125 VAC 60Hz 220 240 VAC 50Hz 4 With 5 micron TFE filter element installed in the internal filter assembly 5 Sample flow of 1000 100 cc min 6 Vacuum pump capable of 6 Hg Abs pressure 2 slpm or better 7 Software settings A Dynamic span OFF B Dynamic zero OFF C Cal on NO2 OFF D Dilution factor OFF E AutoCal ON or OFF F Independent range ON or OFF G Autorange ON or OFF H Temp Pres compensation ON I Converter Efficency 0 96 to 1 02 Under the designation the Analyzer may be operated with or without the following options Rack mount with slides Rack mount without slides ea
71. 55 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 To adjust the SAMPLE FLOW 1 In SAMPLE mode scroll the TEST functions to SAMP FLW Observe the reading Then subtract the observed reading from the desired reading Go to the VARS menu by SETUP MORE VARS then pressing ENTR Scroll to SFLOW SET and press EDIT The first value displayed is the SFLOW SET V ALUE reading ADD the value from step 1 to the reading shown and key in the new reading then press ENTR Check the low and high warning limits which are displayed as the next 2 values to make sure the new value does not exceed the warning limits Press exit to return to SAMPLE mode Observe the SAMP FLW value If necessary repeat step 2 to adjust the reading again to match the desired flow rate 9 56 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Figure 9 8 Flow Pressure Sensor 9 57 Teledyne API Model 200AU NO Analyzer Instruction Manual 02293 Rev Figure 9 9 NO Sensor Module 9 58 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Figure 9 10 NO Sensor Module 9 59 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 9 3 8 NO Sensor Module Figure 9 9 and Figure 9 10 show the assembly of the NO sensor module 9 3 8 1 PMT The PMT detects the light emitted by the reaction of NO with ozone I
72. 8 7 Miscalibration See Table 7 1 Light leak check the sensor module with strong light Sample lines or sample filter dirty clean or replace PMT temp control unstable 9 2 8 Inability to Span Ifthe SPAN button is not illuminated when attempting to span that means the reading is outside ofthe software gain ranges allowed In an analog instrument it would be the equivalent to the span pot hitting the rotation stop Here are some things to check 1 Check the expected span concentration values CAL CONC NOX and CAL CONC NO and compare them to the values of the calibration span gas being input They should be nearly equal Check the NORM_PMT TEST function With NO span gas in the instrument the value should be 2x the expected span concentration Check ET and OT to verify instrument detector and signal processing is working correctly Ifthe above do not check out perform the Factory Calibration Procedure Section 9 1 6 Ifthe PMT voltage is near zero with span gas check fuse and power to ozone generator 9 30 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 9 2 9 Inability to Zero If the ZERO button is not illuminated when attempting to zero that means the reading is outside of the software gain ranges allowed In an analog instrument it would be the equivalent to the zero pot hitting the rotation stop Check the following Select the PMT TEST function With zero gas going into
73. 80 100 of the output Ifthe analog outputs are set for 0 5 full scale the outputs would step 0 1 2 3 4 5 VDC The stepping can be halted at any value by pressing the key under the percentage on the front panel When the test is halted square brackets are placed around the percentage value in the display Pressing the key again resumes the test This test is useful for testing the accuracy linearity of the analog outputs 9 1 3 6 DAC Calibration The Digital to Analog Converters DAC are calibrated when the instrument is set up at the factory Re calibration is usually not necessary but is provided here in case the V F board needs to be replaced and re calibrated The procedure for doing the DAC Calibration routine is in the Troubleshooting Section 9 3 3 1 9 1 3 7 RS 232 Port Test This test is used to verify the operation of the RS 232 port It outputs a 1 second burst of the ASCII letter w During the test it should be possible to detect the presence of the signal with a DVM on pin 2 or 3 depending on the DTE DCE switch setting or by the flickering of the red test LED A detailed procedure is given in the Troubleshooting Section 9 3 2 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 9 1 4 M200AU Internal Variables The M200AU software contains many adjustable parameters Most of the parameters are set at time of manufacture and do not need to be adjusted for the lifetime of the instrument Some of the variab
74. AL TEST Tests just the electronic portion of the PMT signal path Used in conjunction with optic test see Section 9 1 3 2 03 GEN OVERRIDE This function switches the power to the ozone generator It does not indicate the OFF ON status of the generator RS 232 Causes a 1 second burst of data to be transmitted from the RS 232 port Used to diagnose RS 232 port problems See Section 9 1 3 7 9 3 2 for RS 232 port diagnostic techniques 9 12 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev 9 1 3 1 Signal I O Diagnostic Table 9 4 Diagnostic Mode Signal I O 0 DSP_BROWNOUT NO Display brownout is used to keep the display from getting corrupted during low line voltage conditions Circuitry on the Status Temp board senses low line voltage and sets this bit The CPU reads this and generates the BROWNOUT RST signal described below EXT ZERO CAL NO Shows state of status input bit to cause the M200AU to enter Zero Calibration mode Use to check external contact closure circuitry EXT SPAN CAL NO Shows state of status input bit to cause the M200AU to enter the Span Calibration mode Use to check external contact closure circuitry SPAN VALVE YES Switches the Zero Span valve Use this bit to test the valve function CAL VALVE YES Switches the Sample Cal valve Use this bit to test the valve function NOX VALVE YES Switches the NO N
75. ALIBRATION 8 1 12 5 34 TABLE 5 19 RS 232 CALIBRATION EXAMPLES 5 35 TABLE 5 20 RS 232 CALIBRATION MESSAGES 5 36 TABLE 5 21 RS 232 DIAGNOSTIC COMMAND SUMMARY 5 37 TABLE 6 1 ZERO SPAN VALVE OPERATION 6 1 TABLE 6 2 EXAMPLE OF AUTOCAL 1 1 1 3 6 4 TABLE 7 1 TYPES ZERO SPAN CHECK AND CALIBRATION nnne nena 7 2 TABLE 7 2 MANUAL ZERO CALIBRATION PROCEDURE ZERO GAS THRU SAMPLE PORT 7 4 TABLE 7 3 ENTER EXPECTED SPAN GAS CONCENTRATIONS PROCEDURE 7 5 TABLE 7 4 MANUAL SPAN CALIBRATION PROCEDURE SPAN GAS THRU SAMPLE PORT 7 5 TABLE 7 5 MANUAL ZERO CALIBRATION PROCEDURE Z S VALVES 7 6 TABLE 7 6 MANUAL SPAN CALIBRATION PROCEDURE Z S VALVES 7 7 TABLE 7 7 ENABLING DYNAMIC 7
76. BLANK Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 2 GETTING STARTED 2 1 Unpacking 1 Verify that there is no apparent shipping damage If damage has occurred please advise shipper first then Teledyne API CAUTION To avoid personal injury always use two persons to lift and carry the Model 200AU 3 Before operation it is necessary to remove the shipping hold down screws Remove the instrument cover then refer to Figure 2 1 for screw location Also check for internal shipping damage and generally inspect the interior of the instrument to make sure all circuit boards and other components are in good shape Please check the voltage and frequency label on the rear panel of the instrument for compatibility with the local power before plugging in the M200AU 2 2 Electrical and Pneumatic Connections Refer to Figure 2 2 to locate the rear panel electrical and pneumatic connections 1 2 Attach the pump to the Exhaust Out port on the instrument rear panel If you are connecting to a calibrator attach a vented sample inlet line to the sample inlet port The pressure of the sample gas at the inlet port should be at ambient pressure The exhaust from the pump should be vented to atmospheric pressure See Figure 2 3 for inlet and exhaust line venting recommendations during calibration If desired attach the analog output connections to a strip chart recorder and or datalog
77. Box temp would be about 30 C and have a TEST channel voltage of about 2000 mV DCPS 0 mV 5000 mV The DCPS is a composite of several DC power VOLTAGE supply voltages in the instrument It has been arbitrarily set at 2500 mV which is typical HVPS 0 V 5000 V The HVPS voltage is a scaled up reading of the VOLTAGE programming voltage going to the HVPS Zero to 1000 mV corresponds 0 1000 VDC for the HVPS which is the maximum voltage possible A typical reading would be 700 mV corresponding to 700 VDC for the HVPS Minimum and Maximum readings depend on the DAC 3 switch settings of the V F board For the standard 5 VDC range minimum corresponds to 0 VDC and maximum corresponds to 5 VDC 9 22 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 9 1 6 Factory Calibration Procedure This procedure is similar to that used at the factory when the instrument is first manufactured it balances the PMT preamp and software gain factors so the instrument has optimum noise linearity and dynamic range It should be used when you are unable to zero or span the instrument when the slope and offset values are outside of the acceptable range or when other more obvious reasons for problems have been eliminated Factory Calibration Procedure NOTE In this procedure a range of 500 ppb and a span gas concentration of 400 ppb is used as an example Other values can be used i On the Preamp boar
78. Check the procedures for diagnosing the Power Supply Module in Section 9 3 5 RCELL TEMP 40 1 The reaction cell temperature is controlled to 40 C 1 C by the computer It should only read other values when the instrument is warming up If the value is outside the acceptable range go to the procedure for diagnosing the Reaction cell temp supply in Section 9 3 8 2 The alarm limits are less than 35 C and greater than 45 C BOX TEMP 8 48 C The Box Temp is read from a thermistor on the Status Temp board It should usually read about 5 C above room temp The M200AU is designed to operate from 20 to 30 C ambient Therefore the box temperature should be in the range of about 10 to 50 C Temperatures outside this range will cause premature failures of components and poor data quality Warning limits are lt 8 C and gt 48 C PMT TEMP The PMT detector is very temperature sensitive The PMT temperature should always be 5 C except at power up Temperatures more than 1 C from the set point indicate problems with the cooler circuit See Section 9 3 8 4 for PMT cooler diagnostic and troubleshooting Warning limits are 8 C and gt 2 40 2 C Reports the temperature of the sample flow and ozone flow control orifices Variations in these temperatures will cause span concentration drift table continued 9 6 Teledyne API Model 200AU NOx Ana
79. EREACT mV 0 1000 Table 9 1 HVPS V 450 900 constant 9 3 8 5 DCPS mV 2500 200 9 3 5 9 3 4 RCELL TEMP 40 1 9 3 8 2 BOX TEMP C 8 48 9 3 4 1 PMT TEMP C 5 1 9 3 8 4 MOLY TEMP E 315 5 9 3 4 1 RCEL PRES IN Hg A 1 4 constant 9 3 7 SAMP PRES IN Hg A 25 30 constant 9 3 7 Electric Test amp Optic Test Electric Test PMT Volts mV 2000 500 9 1 3 2 NO Conc PPB 1000 250 9 1 3 2 NO Conc PPB 1000 250 9 1 3 2 Optic Test PMT Volts mV 2000 1000 9 1 3 3 NO Conc PPB 1000 500 9 1 3 3 NO Conc PPB 1000 500 9 1 3 3 table continued 2 12 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Table 2 1 Final Test and Calibration Values Continued Nominal Range Reference Section ue mens uem Measured Flows Sample Flow 1000 100 9 3 7 Figure 9 8 1 Factory Installed Options Option Installed Power Voltage Frequency Rack Mount w Slides Rack Mount w Ears Only Rack Mount External Pump w Slides Rack Mount External Pump w o Slides Stainless Zero Span Valves Current Loop NO Chan Isolated Non Isolated Current Loop NO Chan Isolated Non Isolated Current Loop NO Chan Isolated Non Isolated Current Loop TST Chan 0 20 mA Isolated Non Isolated PROM Serial Date Technician 2 13 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F INTENTIONALLY BLANK 2 14 Teledyne API Model 200AU NOx Analyzer In
80. F ON ozone generator 9 1 3 4 RS 232 Writes test data to RS 232 port 9 1 3 7 used for diagnosis 5 9 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 5 2 Sample Mode 5 2 1 Test Functions NOTE In any of the following TEST functions if a value of XXXX is displayed that indicates an off scale and therefore meaningless reading To use the TEST functions to diagnose instrument faults refer to Troubleshooting Section 9 1 Range This is the range of the instrument Electronically there is only one physical range The range of the instrument is just the software expanding various portions of the single physical range to fill the selected analog output voltage range In standard configuration there is one range for all 3 outputs Independent range option allows different ranges for each output When enabled there will be three range values displayed NO and NO Auto range mode allows a low range and high range The M200AU will automatically switch to the other range dynamically as concentration values require The TEST values will show the range the instrument is currently operating in and will dynamically display the alternate range as the range changes occur NOTE Each of the range modes Single range Auto range and Independent ranges are mutually exclusive Stability The instrument noise is computed using the standard deviation of the la
81. Field Operations Guide for Automatic Air Monitoring Equipment Publication No APTD 0736 PB 202 249 and PB 204 650 U S Environmental Protection Agency Office of Air Programs October 1972 7 25 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Table 7 15 Definition of Level 1 and Level 2 Zero and Span Checks from Section 2 0 9 of Q A Handbook for Air Pollution Measurement Systems LEVEL 1 ZERO AND SPAN CALIBRATION A Level 1 zero and span calibration is a simplified two point analyzer calibration used when analyzer linearity does not need to be checked or verified Sometimes when no adjustments are made to the analyzer the Level 1 calibration may be called a zero span check in which case it must not be confused with a Level 2 zero span check Since most analyzers have a reliably linear or near linear output response with concentration they can be adequately calibrated with only two concentration standards two point concentration Furthermore one of the standards may be zero concentration which is relatively easily obtained and need not be certified Hence only one certified concentration standard is needed for the two point Level 1 zero and span calibration Although lacking the advantages of the multipoint calibration the two point zero and span calibration because of its simplicity can be and should be carried out much more frequently Also two point calibrations are easily au
82. INSTRUCTION MANUAL MODEL 200AU NITROGEN OXIDES ANALYZER TELEDYNE INSTRUMENTS ADVANCED POLLUTION INSTRUMENTATION DIVISION T API 6565 NANCY RIDGE DRIVE SAN DIEGO CA 92121 2251 TOLL FREE 800 324 5190 FAX 858 657 9816 TEL 858 657 9800 E MAIL api sales teledyne com WEB SITE www teledyne api com 02293 REV Copyright 1999 API Inc 07 06 99 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 SAFETY MESSAGES Your safety and the safety of others is very important We have provided many important safety messages in this manual Please read these messages carefully A safety message alerts you to potential hazards that could hurt you or others Each safety message is associated with a safety alert symbol These symbols are found in the manual and inside the instrument The definition of these symbols is described below GENERAL WARNING CAUTION Refer to the instructions for details on the specific danger CAUTION Hot Surface Warning CAUTION Electrical Shock Hazard Technician Symbol All operations marked with this symbol are to be performed by qualified maintenance personnel only Electrical Ground This symbol inside the instrument marks the central safety grounding point for the instrument gt gt gt CAUTION The analyzer should only be used for the purpose and in the manner described in this manual If you use the analyzer in a manner other than that for which
83. MORE DIAG OZONE GEN OFF 2 Manual override on ON 3 Ozone flow below low warning limit for 5 minutes OFLOW_SET OFF setup variable typically lt 40 cc min 4 Instrument powered on for more than 30 minutes ON 5 Instrument powered off for less than 1 hour and ozone generator was ON on when instrument was powered off 6 Ozone flow above low warning limit for 0 5 minutes and condition 4 ON or 5 is true NOTE The ozone generator is independently controlled in the SIGNAL VO OPTIC TEST and ELECTRICAL TEST diagnostics After exiting these diagnostics the ozone generator is restored to the state specified by the above conditions 9 3 6 1 PermaPure Drier The PermaPure drier is constructed of 2 concentric tubes The inner tube is a special material that has an affinity for water vapor The outer annulus is evacuated by the instrument pump This creates a concentration gradient causing water in ambient air to diffuse into the outer annulus thus the air in the inner tube becomes progressively drier as it progresses down the tube Due to the large number of connections and fittings on the drier the most common drier fault is leaks Before proceding with any other procedures check the drier for leaks Occasionally the drier gets contaminated The manufacturer of the drier recommends replacing the drier rather than trying to clean it If cleaning is chosen the following options are available 1 Dirt Clean any so
84. O valve Use this bit to test the valve function RCELL HEATER YES Shows the status of the reaction cell heater This has the same function as the LED in the Power Supply Module BLOCK HEATER YES Shows the status of the block heater ELEC TEST YES Turns on electric test bit on the preamp board Should be used for troubleshooting Preamp logic lines We recommend you use the ELEC TEST button in the DIAG menu to operate electric test OPTIC TEST YES Turns on optic test bit in preamp Should be used for troubleshooting Preamp logic lines We recommend you use the OPTIC TEST button in the DIAG menu to operate optic test 10 BROWNOUT RST YES Brownout reset works in conjunction with DSP BROWNOUT When DSP BROWNOUT is set the CPU sends a signal to reset the display and clear DSP BROWNOUT table continued 9 13 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Table 9 4 Diagnostic Mode Signal I O Continued 11 CONV_HEATER YES Shows the status of the Moly heater This has the same function as the LED in the Power Supply Module 12 O3GEN STATUS YES Switches ON OFF power to the ozone generator 13 VALVE YES Switches the Pre reactor valve Use this bit to test the valve function 14 PREAMP_RANGE HI YES Switches the preamp hardware range Only the low range is active in
85. PI Model 200AU Analyzer is designed to measure the concentration of nitric oxide NO total oxides of nitrogen NOx and by calculation nitrogen dioxide NO2 The instrument measures the light intensity of the chemiluminescent gas phase reaction of nitric oxide NO and ozone as follows NO NO2 02 NO 9 NO The reaction of NO with ozone results in electronically excited NO molecules as shown in the first equation above The excited molecules release their excess energy by emitting a photon and dropping to a lower energy level as shown in the second equation It has been shown that the light intensity produced is directly proportional to the NO concentration present The Analyzer samples the gas stream and measures the NO concentration by digitizing the signal from the Analyzer s photomultiplier tube PMT A valve then routes the sample stream through a converter containing heated molybdenum to reduce any NO present to NO by the following reaction 315 C Mo gt 3NO The Analyzer now measures the total NO concentration The NO and NO values are subtracted from each other by the built in computer yielding the NO2 concentration In the third measurement phase the instrument measures sample gas which has been mixed with ozone outside of the reaction cell This Pre Reactor allows the measurement of any hydrocarbon interferents present in the sample gas stream
86. PLE mode normal monitoring Contact Open Contact Closed Span check or calibrate Contact Closed Contact Open Zero check or calibrate Calibrate only if Dynamic Calibration is enabled EPA Protocol Calibration If the M200AU is to be used for EPA compliance monitoring it must be calibrated in accordance with the instructions in this section In order to insure that high quality accurate measurements are obtained at all times the M200AU must be calibrated prior to use A quality assurance program centered on this aspect and including attention to the built in warning features of the M200AU periodic inspection regular zero span checks and routine maintenance is paramount to achieving this In order to have a better understanding of the factors involved in assuring continuous and reliable information from the M200AU it is strongly recommended that Publication No PB 273 518 Quality Assurance Handbook for Air Pollution Measurement Systems abbreviated Q A Handbook be purchased from the NTIS phone 703 487 4650 Special attention should be paid to Section 2 3 which deals with chemiluminescent based NO analyzers and upon which most of this section is based Specific regulations regarding the use and operation of ambient oxides of nitrogen analyzers can be found in 40 CFR 50 and 40 CFR 58 Both publications are available from the U S Government Printing Office phone 202 783 3238 7 6 1 Calibration of Equipment In
87. RESET RAM System reset plus erases RAM Initializes DAS NO NO NO conc readings calib not affected D id RESET EEPROM System reset plus erases EEPROM RESET RAM actions setup variables calibration to default values Restores all factory defaults D id PRINT Prints properties for all data channels DAS D id PRINT name Prints properties for single data channel Quotes around name are required D id REPORT name RECORDS number Prints DAS records for a data channel Quotes around name are required Parameters in brackets are optional COMPACT VERBOSE V id LIST Print all setup variable names and values V id name Print individual setup variable value V id name value Sets setup variable to new value V id CONFIG Print analyzer configuration V id MODE Print current analyzer mode 5 29 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev Table 5 14 RS 232 Command Summary Terminal Mode Editing Keys Definition BS Backspace ESC Erase line CR Execute command NC Switch to computer mode Computer Mode Editing Keys Definition LF Execute command AI Switch to terminal mode Security Features Definition LOGON id password Establish connection to analyzer LOGOFF id Disconnect from analyzer General Output Message Format Reporting of status
88. ST SRM This is described in Subsection 7 1 of Section 2 0 7 Q A Handbook Subsections 7 1 4 and 7 1 5 describe the verification and re analysis of cylinder gases Care must be taken to assure that no oxygen is allowed in the NO tank regulator or sample lines If oxygen is present it reacts with NO to produce NO which can lead to significant errors in NO concentration measurement It is good practice to request a NO analysis from the supplier of the NO calibration gas Generally the maximum NO impurity that should be allowed is 196 of the NO concentration The NO impurity in the NO standard can be measured by the M200AU A procedure is given in the TAD for NO measurement Use of NO permeation tubes as standards The steps required to compare the concentration of a commercial working calibration standard to an NIST SRM are described in Subsection 7 3 3 of Section 2 0 7 Q A Handbook See Subsection 7 3 6 for the re analysis of permeation tubes 7 6 3 Data Recording Device Either a strip chart recorder data acquisition system digital data acquisition system should be used to record the data from the M200AU RS 232 port or analog outputs If analog readings are being used the response of that system should be checked against a NIST referenced voltage source or meter Data recording device should be capable of bi polar operation so that negative readings can be recorded 7 6 4 Gas Phase Titration GPT System 7 6 4 1 Gas Phase
89. Sample Port The calibration of the instrument can be checked or adjusted using gas coming through the sample port This method is often used when the calibration gas is supplied from an external calibrator and valve system This is the calibration procedure to use if the instrument is purchased without the Zero Span Valve option Since the zero gas concentration is defined as 0 ppb it is not necessary to enter the expected zero value Table 7 2 details the zero calibration procedure with zero gas coming in through the sample port Table 7 2 Manual Zero Calibration Procedure Zero Gas thru Sample Port Step Number Action Comment 1 Press The M200AU enters the calibrate mode from sample mode The zero gas must come in through the sample port When the CAL button is pressed the adaptive filter is activated This allows the instrument to respond rapidly to concentration changes regardless of their magnitude 2 Wait 10 min Wait for reading to stabilize at zero value or for STABIL reading to get to lt 2 ppb 3 Press ZERO If you change your mind after pressing ZERO you can still press EXIT here without zeroing the instrument 4 Press ENTR Pressing ENTR actually changes the calculation equations 5 Press EXIT M200AU returns to sampling Immediately after calibration data is not added to the DAS averages 7 4 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev
90. a pal slo pal 7 12 7 6 4 Gas Phase Titration GPT 7 12 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 7 6 5 Dynamic Multipoint Calibration 7 6 6 Moly Converter 7 6 7 Calibration Frequency s oe et eter aa ia ae 7 6 8 Other Quality Assurance Procedures 7 6 9 Summary of Quality Assurance Checks 7 6 10 ZERO and SPAN Checks dd a dd 7 6 11 Recommended Standards for Establishing Traceability 7 6 12 Certification Procedures of Working 7 7 CALIBRATION OF INDEPENDENT RANGES OR AUTORANGING 7 7 1 Zero Calibration with AutoRange or Independent Range 7 7 2 Span Calibration with AutoRange or Independent Range 7 9 TS REFERENCES D bulli pali ubi alias 8 MAINTENANGE 244202242002 Lari 8 1 MAINTENANCE SCHEDU ES Ea 8 2 REPLACING THE SAMPLE PARTICULATE FILTER 8 3 SAMPLE PUMP MAINTENANCE
91. absolute pressure at 10 000 ft 3000 m is about 20 Hg A A typical value near sea level would be about 4200 mV RCELL PRESSURE 0 Hg Abs 40 Hg Abs Like the SAMPLE PRESSURE the RCELL pressure is an absolute pressure measurement With the sample pump off it should read about atmospheric pressure With the pump operating a typical value is 1300 mV for about 5 Hg A reaction cell pressure table continued 9 21 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Table 9 6 Test Channel Readings Continued TEST Channel Minimum Maximum Description RCELL TEMP 0 70 Reaction Cell temperature is set to 50 C At the setpoint a typical reading is 3600 mV BLOCK TEMP 0 C 70 C The Block temperature is set to 50 C At the setpoint a typical reading is 3600 mV IZS TEMP 0 C 70 C The IZS temperature is set to 50 C Atthe setpoint a typical reading is 3600 mV CONV TEMP 0 C 1000 C The Converter temperature is 315 C At the setpoint a typical voltage is 3150 mV PMT TEMP 0 C 70 C The PMT temperature is unique in that the voltage is inverse to the temperature A typical reading for 8 C would be 4200 mV CHASSIS 0 70 The Chassis Box temperature is variable due to TEMP variable ambient air temperature The Box temp generally runs about 5 C above the surrounding air temp Thus in a 25 C room the
92. admit C EXIT Zero gas Instrument zero is just checked but not changed Execute AutoCal Sequence 2 C ASEQ2 Execute a predefined AutoCal Sequence Executes sequence immediately ignoring time and date parameters Span Calibration Check C SPAN Z S valves switched to admit C EXIT span gas Instrument span is just checked but not changed Whenever the analyzer starts or finishes a ZS calibration it issues a status report to the RS 232 interface If the RS 232 interface is in the normal mode these reports will be sent Otherwise they will be discarded Table 5 20 shows the format of the text of the calibration messages An example of an actual sequence of calibration status messages is C DDD HH MM START MULTI POINT CALIBRATION C DDD HH MM NOX xxxxx PPB NO xxxxx PPB NO2 xxxxx PPB C DDD HH MM FINISH MULTI POINT CALIBRATION 5 35 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev Table 5 20 RS 232 Calibration Messages Message Description START ZERO CALIBRATION Beginning ZS zero calibration NOX xxxxx PPB NO xxxxx PPB NO2 xxxxx PPB FINISH ZERO CALIBRATION Finished ZS zero calibration START SPAN CALIBRATION Beginning ZS span calibration NOX xxxxx PPB NO xxxxx PPB NO2 xxxxx PPB FINISH SPAN CALIBRATION Finished ZS span calibration START MULTI POINT CALIBRATION Begi
93. alculated to the equivalent value in ug m Therefore the span value now becomes 400 ug m instead of 400 ppb 5 3 4 5 Recorder Offset If necessary the analog outputs can be biased This can be used to offset the output voltage of each channel 10 of the current output voltage setting It is intended for recorders that cannot show slightly negative readings It can also be used to bias the input to a datalogger to offset small external ground loop voltages that are sometimes present in monitoring systems The offset is set in the V F calibration menu Press SETUP MORE DIAG scroll to A D CALIBRATION then press ENTR Select CFG SET OFFSET then enter the desired offset and press ENTR Press EXIT to return to the SAMPLE mode 5 3 5 Password Enable If password protection is enabled a password is required to access calibration or setup menus In the VARS menu a password is always required To enable passwords press SETUP PASS ON A list of passwords is in Table 5 7 Table 5 7 Calibrate Setup Passwords Password Usage Password Calibration Password Use to get into CAL menus 512 101 Setup Password Use to get into SETUP menus 818 101 5 21 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 5 3 6 Time of Day Clock The instrument has an internal time of day clock The time of day can be set by pressing SETUP CLOCK TIME and entering the time in 24hr format In a similar manner the da
94. alue Increasing readings are a predictor of problems Table 7 18 Calibration Quality Check Step Number Action Comment 1 Scroll the TEST The SLOPE value for NO should be 1 0 0 3 If the value is function menu until not in this range check Section 9 1 6 If the SLOPE value is in the NO SLOPE is the acceptable range the instrument will perform optimally displayed 2 Scroll the TEST The SLOPE value for NO should be 1 0 0 3 If the SLOPE is function menu until in the acceptable range the instrument will perform optimally If the NO SLOPE is the value is not in this range check Section 9 1 6 displayed NOTE The NO and NO slopes should be equal within 0 1 3 Scroll the TEST This number should be near zero Values between 10 to 150 function menu until mV are acceptable This number already has the PREREACT the NO OFFSET is value subtracted out and is mainly the background signal due to displayed the molybdenum converter Ifthe OFFSET value is outside this range check Section 9 1 6 4 Scroll the TEST The instrument will now display the NO OFFSET value Values function menu until between 10 to 150 mV are acceptable This number already the NO OFFSET is has the PREREACT reading subtracted out and should be near displayed zero If the OFFSET value is outside this range check Section 9 1 6 After the above procedure is complete the M200AU is ready to measure sample gas 7 34
95. ample inlet will cause the M200AU to be noisy and to shift its reading SLOPE 1 0 0 3 This is the software slope value It operates like a software gain pot Refer to Table 7 18 on Calibration Quality for additional information OFFSET 0 10 150 This is the software offset value It operates like a software DC offset pot Refer to Table 7 18 on Calibration quality for additional information TIME HH MM SS This is the time of day clock readout It is used to time the AutoCal cycles The speed of the clock can be adjusted by the CLOCK variable in the VARS menu The clock can be set via SETUP CLOCK TIME from the front panel 9 7 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev 9 1 2 Fault Diagnosis with WARNING Messages The M200AU monitors several internal values for alarm conditions If the condition for an alarm is met the alarm is displayed on the front panel and the warning is transmitted out the RS 232 port If a warning is present it can be cleared by pressing the CLR key on the front panel If uncleared warnings are present they can be examined by pressing the MSG button on the keyboard Any time the instrument is powered up the SYSTEM RESET alarm will be displayed Generally it is ok to ignore warnings that are displayed shortly after power up only if they persist should they be investigated Table 9 2 shows the warning messages and gives some possible
96. an those supplied by Teledyne API may result in non compliance with European Standard EN 61010 1 NOTE Table 10 1 Teledyne API M200AU Spare Parts List 025690000 Teledyne API Model 200AU Spare Parts List 000940400 Orifice 4 mil 80 cc Rx Cell 844 012600 000941000 Orifice 13 mil 1000 cc Rx Cell 002270100 Gasket Rx Cell Qty 12 002730000 Window 665 NM 002 013100 002761010 CPU Board 200AU AMX 003690000 Filter TFE 37 mm Qty 100 872 006400 003690100 Filter TFE 37 mm Qty 25 872 006300 005140300 V F Board 007280000 NEW Display 009690000 Filter TFE 47 mm Qty 100 009690100 Filter TFE 47 mm Qty 25 010680100 Heater MOLY Converter 010860000 Status Temperature Board 011310000 Drier Assembly Complete with Flow Control 011980000 Assembly MOLY Thermocouple 012360000 Fan Power Supply Module 013140000 Fan PMT Cooler 013570000 Thermistor Assembly Cooler 014080100 Assembly High Voltage Power Supply 014610000 Cooler Assembly 016810000 O3 Generator Assembly W 01668E Driver Board 018720000 Molybdenum converter with 03 Scrubber 019300000 Keyboard table continued 10 1 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Table 10 1 Teledyne API M200AU Spare Parts List Continued 021070000 PMT Pre amplifier Board A
97. ange in response has occurred For automatic Level 2 zero and span checks the first scheduled check following the calibration should be used for the reference response It should be kept in mind that any Level 2 check that involves only part of the analyzer s system cannot provide information about the portions of the system not checked and therefore cannot be used as a verification of the overall analyzer calibration 7 26 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev 7 6 9 Summary of Quality Assurance Checks The following items should be checked on a regularly scheduled basis to assure high quality data from the M200AU See Table 7 16 for a summary of activities also the QA Handbook should be checked for specific procedures 7 27 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Table 7 16 Activity Matrix for Data Quality RP 2027 Frequency And Method Action If Requirements Characteristic Acceptance Limits CIME Are NoeMet Shelter temperature Mean temperature Check thermograph chart 1 Mark strip chart for between 22 C and 28 C 72 and 82 F daily fluctuations not greater than 2 C weekly for variations greater than 2 4 F the affected time period 2 Repair or adjust temperature control Sample introduction system 1 No moisture foreign material leaks obstructions 2 Sample line connected to manifold Weekl
98. ata Channel can store multiple data parameters The Data Channels can be programmed and customized from the front panel A set of default Data Channels has been included in the M200AU software For more information on programming custom Data Channels a supplementary document containing this information can be requested from Teledyne API Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev 5 3 3 1 Data Channels The function of the Data Channels is to store report and view data from the analyzer The data may consist of NO NO concentration or may be diagnostic data such as the sample flow or reaction cell pressure The M200AU comes pre programmed with a set of useful Data Channels for logging concentration and predictive diagnostic data The default Data Channels can be used as they are or they can be changed by the user to fit a specific application They can also be deleted to make room for custom user programmed Data Channels The data in the default Data Channels can be viewed through the SETUP DAS VIEW menu Use the PREV and NEXT buttons to scroll through the Data Channels and press VIEW to view the data The last record in the Data Channel is shown Pressing PREV and NEXT will scroll through the records one at a time Pressing NX10 and PV10 will move forward or backward 10 records For Data Channels that log more than one parameter such as PNUMTC buttons labeled lt PRM and PRM gt will appear These b
99. causes 9 8 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev Table 9 2 Front Panel Warning Messages Message Description SYSTEM RESET Analyzer was reset powered on This warning occurs every time the instrument is powered up as in a power failure It can also occur if the RAM or 15 reset RAM INITIALIZED RAM was erased The RAM contains the DAS averages which get erased when the RAM is initialized It also contains temporary data used by the M200AU to calculate concentrations No setup variables are stored in the RAM SAMPLE FLOW WARN The calculated sample flow is outside the hi low limits Since the flow is calculated it probably means the pressure has gotten too low Flow warnings are caused by a plugged sample inlet or ozone line OZONE FLOW WARNING Ozone flow out of spec Warnings occur most often because of loss of vacuum which causes the ozone flow to go to zero They also can occur due to a flow sensor failure RxCELL PRESS WARNING Vacuum out of spec Warnings are caused by leaks pump failure or disconnected pump BOX TEMP WARNING Box temp out of spec Instrument fan failure enclosure temperature failure Operation of the M200AU in a too warm or cold environment will cause degradation of data quality and shorten the life of the instrument RCELL TEMP WARNING Reaction cell temp out of spec The warning message is most often prese
100. computer software It is extremely unlikely that the NO concentration will be in error if the NO and NO channels are calibrated correctly Therefore this procedure is a confirmation that the NO subtraction algorithm in the computer is operating correctly NOTE During this procedure do not make any adjustments to the instrument 1 Generate a NO concentration near 90 of the URL Dilution air and O3 generator air flows should be the same as used in the calculation of specified conditions of the dynamic parameter according to Section 7 6 4 Sample this NO concentration until the NO and NO responses stabilize Record the NO and NO concentrations 7 21 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 2 Turn on and adjust the O generator in the calibrator to produce sufficient to decrease the NO concentration to about 10 of full scale This will be equivalent to 80 ofthe URL of the NO channel After the analyzer responses stabilize record the resultant NO and NO concentrations MOLY CONVERTER EFFICIENCY IF THE NOx READING SHOULD DROP TO LESS THAN 96 OF ITS STARTING VALUE DURING THIS STEP IT INDICATES THE MOLY CONVERTER IS IN NEED OF TROUBLESHOOTING OR REPLACEMENT SEE SECTION 7 6 6 FOR FURTHER DETAILS 3 While maintaining all other conditions adjust the ozone generator to obtain several other concentrations of NO evenly spaced between the 80 URL point and the zero point
101. croll to SPAN 4 Press ENTR ENTR selects the SPAN MODE 5 Press SET Select the SET menu to change the sequence attributes 6 Press PREV NEXT Scroll the SET menu to TIMER ENABLE 7 Press EDIT Allows changing the TIMER ENABLE attribute select ON 8 Press ENTR ENTR changes TIMER ENABLE to ON 9 Press PREV NEXT Repeat steps 6 9 for each attribute 10 Press EXIT Press the EXIT key to return to upper level menus 6 4 4 20 mA Current Loop Output The current loop option replaces the voltage output of the instrument with an isolated 4 20 mA current output The current outputs come out on the same terminals that were used for voltage outputs see Figure 2 2 See Troubleshooting Section 9 3 3 for setup and calibration NO Converter The NO Converter Option allows placement of the molybdenum converter at the sample inlet point This configuration is useful for background studies and where it is desirable to immediately convert certain components of the atmosphere that decompose rapidly or may be lost on the walls of a normal sample induction system This group of compounds is sometimes referred to as NO The Option consists of a modified M200AU a M501Y chassis and remote converter The pneumatic diagram for this system of components is in Figure 8 7 Because of the nature of this option there is a separate manual M501 Y Remotely Mounted Converter P N 02808 The manual covers setup calibration and operation of the system 6 4
102. d If an overload is detected the switch goes to the OFF position Switching the power back on resets the breaker also 9 48 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F A fi i J lt A i 704 S A j f hal m Fu X x OW 1 Figure 9 5 Power Supply Module Layout 9 49 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Figure 9 6 Electrical Block Diagram 9 50 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F PSM Diagnostic Procedures The Linear Power Supply board can be tested by checking the DCPS TEST function on the front panel It should read 2500 mV 200 mV Ifthe value is outside this range individual output voltages can be tested on connector P3 see Schematic in the Appendix for pinouts The Switching Power Supply output can be tested by observing the temperature ofthe PMT cold block using the PMT TEMP TEST function The temperature should be constant 5 2 C The output voltage can be observed on J10 of the Switch Board It should be 15 VDC 0 5 The Switch Board can be tested by observing the diagnostic LEDS along the top edge of the board The following Table 9 10 describes the typical operation of each LED Table 9 10 Power Supply Module LED Operation No Function Description 1 NO NO Valve Should switch about every
103. d each key should perform an operation indicated by its current definition shown on the second line of the display Example 1 testing key 1 left most key At the top level menu key 1 is defined as the TEST function Pressing this key should cause the middle field of the top line of the display to show the various test functions Example 2 testing key 8 right most key At the top level menu key 8 is defined as the SETUP key pressing key 8 should cause the SETUP menu to be displayed Example 3 If the 5 character field above any key is blank the key is not defined pressing the key has no effect The 3 status LED s indicate several functional states of the instrument such as calibration fault and sample modes The state of the LED s is controlled by 3 lines on the parallel port of the SBC40 Functioning of the LED s can be checked by 1 Turn off the M200AU power 22 While watching the LED s turn on the instrument power 3 When the power comes up the computer momentarily applies power to all 3 LED s If all the LED s are observed to light they are working properly 9 35 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev 9 3 2 RS 232 Communications The M200AU uses the RS 232 communications protocol to allow the instrument to be connected to a variety of computer based equipment RS 232 has been used for many years and is well documented Generally every manufacturer observes the signal a
104. d set S1 and S2 to 8 Turn R19 25 turns counter clockwise then 12 turns clockwise Set RANGE MODE to SNGL by SETUP RNGE MODE SNGL to select single range operation Set the RANGE to 500 ppb by SETUP RNGE SET and key in 500 then press ENTR Input Zero gas into the sample port and Scroll to the TEST function labeled PMT Typical reading should be less than 50 mV Readings above 150 mV indicate a pneumatic leak light leak contaminated reaction cell bad zero gas or wet air coming into the ozone generator If readings are greater than 150 mV the instrument will not zero or span properly see Sections 9 2 8 9 2 9 Allow the instrument to sample zero gas for at least 20 minutes to re fill the internal data filters and Pre reactor filter with zero readings Then zero the instrument by CAL ZERO ENTR Set the expected span concentration to 400ppb Enter the expected NO concentration of 400 ppb by pressing CAL CONC NOX Then press CAL CONC NO to enter the expected NO concentration of 400 ppb Then press EXIT to return to the CAL menu Input 400 ppb of NO span gas in the sample inlet port Scroll to the NORM PMT TEST function 9 23 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev 9 10 11 12 13 Calculate the expected NORM_PMT mV reading Multiply the expected span value by 2 to get the mV reading In this example the expected span gas concentration is 400 ppb and therefore the expected
105. d respond with V DDD HH MM BOX SET 30 10 50 0 to 60 The CONFIG command lists the software configuration To show the software configuration type V CONFIG In addition to SAMPLE and SETUP modes the M200AU has a number of additional operational modes They are listed in Table 5 8 To list the analyzer s current mode type V MODE 5 40 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev 6 OPTIONAL HARDWARE AND SOFTWARE Optional equipment offered with the M200AU includes Rack mount with slides Rack mount without slides ears only Stainless steel zero span valves 4 20mA isolated outputs NO Converter Fid uA 6 1 Rack Mount Options Rack Mount including slides and ears permits the Analyzer to be mounted in a standard 19 wide x 24 deep RETMA rack Can also be ordered without slides for applications requiring the instrument to be rigidly mounted in a RETMA rack 6 2 Zero Span Valves The Zero Span Valve option consists of two stainless steel solenoid valves This option is applicable only to the instrument with internal molybdenum converter See Figure 2 5 for valve location Connections are provided on the rear panel for span gas and zero gas inputs to the valves See Figure 2 2 The valves can be actuated by several methods shown in Table 6 1 Table 6 1 Zero Span Valve Operation Mode Description Reference Section 1 Fr
106. discussed in Section 7 5 31 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev 5 5 3 TEST Commands and Messages Table 5 16 RS 232 Test Messages Name Message Description RANGE RANGE xxxxx PPB Analyzer range NOXRANGE RNG xxxxx Indep Range for NO channel NORANGE NO RNG xxxxx PPB Indep Range for NO channel NO2RANGE NO2 RNG xxxxx PPB Indep Range for NO channel STABILITY NOX STB xxxx xx PPB Std Deviation NO conc values SAMPFLOW SAMP FLW xxx CC M Sample flow rate OZONEFLOW OZONE FL xxxx CC M Ozone flow rate PMT PMT xxxxxx MV PMT output NORMPMT NORM PMT xxxxxx MV Normalized PMT output PRE REACTOR PREREACT xxxxx MV Pre reactor filter value HVPS HVPS xxxxx V High voltage power supply DCPS DCPS xxxxxx MV DC power supply RCELLTEMP RCELL TEMP xxx C Reaction cell temperature BOXTEMP BOX TEMP xxx C Internal box temperature PMTTEMP PMT TEMP xxx C PMT temperature CONVTEMP MOLY TEMP xxx C Molycon temperature RCELLPRESS RCEL xxx x IN HG A Rx cell pressure SAMPPRESS SAMP xxx x IN HG A Sample pressure NOXSLOPE NOX SLOPE xxxxx NO slope parameter NOXOFFSET NOX OFFS xxxxx NO offset parameter NOSLOPE NO SLOPE xxxxxx NO slope parameter NOOFFSET NO OFFS xxxxxx NO offset parameter NO2CONC NO2 xxxxx PPB Instantaneous NO concentration NOXCONC NOX xxxxx PPB Instantaneous NO concentration
107. e 3 values every 4 seconds 4 2 5 1 Keyboard The second line of the display contains eight fields Each field defines the key immediately below it By redefining the keys dynamically it is possible to simplify the instrument electronics and user interface When entering data in the keyboard if the entered value is not accepted the M200AU will beep to notify the user that the value keyed in was not accepted The original value remains unchanged 4 2 5 2 Status LED s At the right of the display there are 3 status LED s They can be in three states OFF ON and Blinking The meanings of the LED s are given in Table 4 1 4 5 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Table 4 1 Front Panel Status LED s LED State Meaning Green On Monitoring normally taking DAS data Off NOT monitoring DAS disabled Blinking Monitoring DAS in HOLDOFF mode 1 Yellow Off Auto cal disabled On Auto Dynamic cal enabled Blinking Calibrating Red Off No warnings exist Blinking Warnings exist 1 This occurs during Calibration DAS holdoff power up holdoff and when in Diagnostic mode 4 2 5 3 Power Switch The power switch has two functions The rocker switch controls overall power to the instrument in addition it includes a circuit breaker If attempts to power up the M200AU result in a circuit breaker trip the switch automatically returns to the off position and the instrument wi
108. e front panel will read the concentration anywhere from 0 to 2000 ppb regardless of the range selected Only one of the following range choices can be active at any one time NOTE There are 3 range choices 1 2 3 5 3 4 1 Single Range Auto Range Independent Ranges Single Range This range option selects a single range for all output channels NO NO of the M200AU To select Single Range press SETUP RNGE MODE SING then press ENTR To set the value for the range press SETUP RNGE SET enter the full scale range desired from 5 ppb to 2000 ppb then press ENTR Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 5 3 4 2 Auto Range Auto Range allows the NO NO NO outputs to automatically range between a low range and high range There is only one low range and one high range for all outputs The Hi range mode is signaled by a bit on the STATUS option see Table 5 9 When the instrument output increases to 98 of the low range value it will Auto Range into Hi range In Hi range when the output decreases to 75 of low range it will change to the lower range If you select a Hi range that is less than Low range the M200AU will remain locked in Low range and behave as a Single Range instrument To set up Auto Range press SETUP RNGE MODE AUTO then press ENTR To set the values press SETUP RNGE SET The M200AU will prompt you for LO then HI which are the lower and upper
109. eck for light leaks Turn off the ozone generator then wait 7 minutes If the reading drops significantly the reaction cell is contaminated If not a light leak is indicated Incorrect span gas concentration this could come either from the calibrator or entering the expected span gas concentration in the M200AU incorrectly see Table 7 3 If the instrument does not respond to span gas check Section 9 2 3 The above should get you started in diagnosing and repairing the most common faults If these reasons have been eliminated the next thing to do is a Factory Calibration covered in Section 9 1 6 or check Section 9 2 for other fault diagnosis If difficulties persist contact our service department The 800 telephone number is on the cover page of this manual Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev 9 1 Operation Verification M200AU Diagnostic Techniques 9 1 1 Fault Diagnosis with TEST Variables Table 9 1 indicates possible fault conditions that could cause the TEST functions to be outside the acceptable range 9 3 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Table 9 1 Test Functions Test Function Factory Set Up Comment RANGE 500 PPB This is the Range of the instrument In standard configuration all 3 outputs have the same range Independent range option allows different ranges for each output When enabled there will be 3 range value
110. el enter D REPORT name RECORDS nnn COMPACT VERBOSE Examples of reports are D REPORT CONC RECORDS 35 VERBOSE D REPORT CALDAT RECORDS 10 D REPORT PNUMTC RECORDS 155 VERBOSE Automatic RS 232 reporting can be independently enabled and disabled for each Data Channel For all default data channels automatic reporting is initially set to OFF If this property is turned on the Data Channel will issue a report with a time and date stamp to the RS 232 port every time a data point is logged The report format is shown below D 94 08 00 0200 CONC AVG NXCNC1 1234 5 PPB D 94 08 00 0200 CONC AVG NOCNCI 1234 5 PPB D 94 08 00 0200 CONC AVG N2CNC1 1234 5 PPB One CONC report consists of D Type of report Diagnostic 94 08 00 Time and Date stamp Julian day Hr Min 0200 Instrument ID number CONC Data Channel name CONC concentration data PNUMTC pneumatic parameters CALDAT calibration parameters AVG Type of data AVG average reading INST instantaneous reading NXCNCI 1234 5 PPB Name of the parameter NX NOx NO NO N2 NO2 5 38 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 All of the default Data Channels sample more than one parameter for these channels each parameter is printed on a separate line There is also a compact format If this attribute is enabled all 3 conce
111. enter the converter efficiency into the instrument The first is to just type in the converter efficiency using the CAL CONC MOLY SET menu The second method is to have the M200AU compute the efficiency using the CAL CONC MOLY CAL menu See the Calibration Section 7 6 6 1 Molybdenum Converter Efficiency for details To disable the compensation press CAL CONC MOLY SET and enter 1 0000 as the efficiency Factory default is 1 0000 5 3 Set Up Mode 5 3 1 Configuration Information CFG This menu item will tell if the installed software has factory special features or other non standard features If you call Teledyne API service you may be asked for information from this menu 5 3 2 Automatic Calibration AutoCal The AutoCal feature allows the M200AU to automatically operate the Zero Span Valve option to periodically check its calibration Information on setting up AutoCal is in Section 6 3 5 3 3 Data Acquisition System DAS The M200AU contains a flexible and powerful built in data acquisition system DAS that enables the analyzer to store concentration data as well as diagnostic parameters in its battery backed memory This information can be viewed from the front panel or printed out through the RS 232 port The diagnostic data can be used for performing Predictive Diagnostics and trending to determine when maintenance and servicing will be required The logged parameters are stored in what are called Data Channels Each D
112. ep three comes up to the stated value the instrument is capable of responding to the light generated by the chemiluminescent reaction If the instrument passes OT but there is absolutely no response to span gas the most common cause is that the ozone generator is either broken or is turned off A second common cause is that what is thought to be span gas is actually zero gas Ifthe HVPS or the span gain adjust on the preamp card has been changed without doing a FACTORY CALIBRATE the reading in step 3 may be different than 2000 mV since the overall calibration affects OPTIC TEST See Section 9 1 6 for factory calibration procedure Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev 9 1 3 4 Ozone Gen Power This diagnostic manually turns the power off and on to the ozone generator When the M200AU is powered up from a cold start the ozone generator is not immediately started This is due to the fact that humid air may be present in the generator cartridge Humid air can produce nitric acid aerosol which can permanently damage parts of the instrument down stream of the generator Using this diagnostic it is possible to turn on the generator before the warmup time has elapsed If you turn the power on it will remain on after you exit the diagnostic 9 1 3 5 Analog Out Step Test The Step Test is used to test the functioning of the 4 DAC outputs on the V F board The test consists of stepping each analog output 0 20 40 60
113. er will cause a 0 3in Hg change in pressure 3 The altitude ofthe analyzer will cause the cell pressure to change Nominal values are 1 to 4 in Hg A typical reading is about 3 5 in Hg A 5 12 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Sample Pressure The pressure in the sample inlet line is measured by a solid state pressure sensor which measures absolute pressure This pressure typically runs 0 5 or so below atmospheric pressure due to the pressure drop in the sample inlet lines and valves NO NO Slope and Offset Values The coefficients of 2 NO and NO straight line equations y mx b determine the calibration of the M200AU The slope parameter m can be thought of as a gain term which determines the steepness of the calibration curve The offset parameter b compensates for differences in the background signal of the NO and NO channels The values of these parameters can be used to determine the quality of the calibration These 4 parameters contain valuable information about the quality and validity of the calibration For example the NO and NO slope values should not differ by more than 1 from each other Larger values indicate a flow imbalance such as a leak or problems with the molybdenum converter Refer to Section 7 8 Calibration Quality for details on how to use these values Time This is an output of the M200AU s internal time of day clock 5 2 2 CAL CALS CALZ Calibration
114. etermine the slope Snom Calculate the NO concentration of the working standard NO srp from NO stp NO X Snom A procedure is presented in the TAD in Reference 2 7 6 12 2 Other Methods of Establishing Traceability They are l NO working standard traced to NIST NO standard 2 NO working standard traced to NIST NO standard 3 NO working standard traced to NIST NO standard NOTE For further information on calibration by GPT and NO permeation devices refer to part 50 of Chapter 1 Title 40 CFR Appendix F revised December 1 1976 and Reference 13 of that Appendix 7 7 Calibration of Independent Ranges or Autoranging There are additional considerations when AutoRange or Independent Ranges are selected The M200AU uses one physical range of 0 2000 ppb to cover all EPA concentration ranges The dynamic range of the internal hardware and computer software is sufficient to cover this entire range Internally the range only scales parts of the 0 2000 ppb physical range to cover the voltage range selected for the analog outputs 7 7 1 Zero Calibration with AutoRange or Independent Range Having one physical range to cover all EPA concentration ranges simplifies zero calibration No matter what AutoRange or Independent Range values are selected the values computed from a zero calibration are the same Therefore no special precautions need to be taken when doing a zero calibration 7 32 Teledyne API Model 20
115. ev 6 Broken PMT temperature control circuit or broken PMT cooler power supply Check PMT TEMP TEST function T Mis calibration Check NO NO SLOPES in TEST function 8 Reaction cell pressure too high leak on vacuum side or bad sample pump Check RCEL TEST function 9 2 6 Unstable Span Common causes are Leak in pneumatic system Light leak check the sensor module with strong light Instrument not fully warmed up Sample lines or sample filter dirty clean or replace Plugged sample inlet orifice clean with methanol and sonic cleaner Defective HVPS see HVPS test procedure Bad or defective PMT detector replace RN que DE Reaction cell temp not stable observe warning messages or RCELL TEMP in TEST functions Check diagnostic LED in Power Supply Module for normal cycling 9 Large variations in ambient temperature observe warning messages or BOX TEMP in TEST functions 10 Large variations in line voltage Line voltage should remain within 10 of nominal 11 Pump not maintaining steady vacuum observe warning messages or RCEL in TEST functions 12 Sample vent line too short allowing room air to mix with span gas Line should be a minimum of 15 long 13 Calibration gas source unstable 9 29 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 9 2 7 Unstable Zero Common causes are Fi DIE Leak in pneumatic system Perform leak check see Section
116. ev F Table 9 3 Summary of Diagnostic Modes DIAG Mode Description SIGNAL I O Gives access to the digital and analog inputs and outputs on the V F board The status or value of all of the signals can be seen Some of the signals can be controlled from the keyboard Table 9 4 gives details on each signal and information on control capabilities NOTE Some signals can be toggled into states that indicate warnings or other faults These settings will remain in effect until DIAG mode is exited then the M200AU will resume control over the signals ANALOG OUTPUT Causes a test signal to be written to the analog output DAC s The signal consists of a scrolling 0 20 40 60 80 100 of the analog output value The scrolling may be stopped by pressing the key underneath the display to hold the current value The exact voltage values depend on the switch settings on the V F board amplifiers D A CALIBRATION The analog output is created by 4 digital to analog converters This selection starts a procedure to calibrate these outputs Refer to Section 9 3 3 1 for a detailed procedure TEST CHANNEL Allows several different internal voltages to be routed to an analog output port Useful for diagnosing intermittent faults OPTICAL TEST Sets the M200AU into a known state and turns on an LED near the PMT to test the instrument signal path See Section 9 1 3 3 for details on using this test ELECTRIC
117. event back diffusion and pressure effects See Figure 2 3 for fitting location and tubing recommendations Zero air for this instrument should have less than 1 ppt 001 ppb NO and have various interferent gas concentrations such that they produce less than 1 ppt total interferent We recommend a tank of Ultra Zero Air commonly used in gas chromatographic applications as a reliable and constant source of zero air Another source of zero air is the Model 701 zero air module 6 3 Autocal Setup Zero Span Valves The Autocal system operates by executing SEQUENCES It is possible to enable 0 3 sequences each sequence operates in one of 4 MODES Mode No Mode Name Action Disabled Disables the Sequence Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F For each mode there are seven attributes that the MODE can have that control operational details of the SEQUENCE They are Example of enabling sequence 2 Do a span check hour later every other day lasting 15 minutes without calibration 6 3 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev Table 6 2 Example of AutoCal Setup Step Action Comment 1 Press This button sequence will cause the AUTOCAL menu to be SETUP ACAL displayed 2 Press PREV NEXT Press PREV NEXT until SEQ 2 is displayed 3 Press MODE Select the MODE menu 3 Press PREV NEXT Press PREV NEXT to s
118. following 4 signals can be set to output specific voltages to each DAC Use in conjunction with ANALOG OUTPUT test to check each DAC output channel The value keyed in should appear on the appropriate analog output channel This value overrides data being written from the analyzer Value reverts to instrument output when function is exited 40 YES NO DAC programming voltage See above for description 41 NO2 CONC YES NO DAC programming voltage See above for description 42 TEST_OUTPUT YES TEST channel programming voltage See above for description 9 1 3 2 Electric Test This function injects a constant voltage between the preamplifier and the buffer amplifier on the preamp board Electric test checks part of the preamp the V F and computer for proper functioning The result of electric test should be a smooth quiet signal as shown by constant values for the NO NO concentrations the concentration should be near zero Likewise the analog outputs should produce a smooth quiet trace on a strip chart Procedure 1 Scroll the TEST function to PMT 2 Press SETUP MORE DIAG then scroll to ELECT TEST by pressing the NEXT button When ET appears press ENTR to turn it on 3 The value in PMT should come up to 2000 mV 500 mV in less than 15 sec Ifthe HVPS or the span gain adjust on the preamp card has been changed without doing the FACTORY CALIBRATION procedure the reading in step 3
119. for every data point logged NOTE This Data Channel collects data based on an event a calibration rather than a timer This Data Channel will store data from the last 200 calibrations This does not represent any specific length of time since it is dependent on how often calibrations are performed As with all Data Channels a time and date stamp is recorded for every data point logged This is the EPA definition of noise used for equivalency testing The collector provides a continuous readout of the noise In order for the data to be meaningful the instrument must sample a constant concentration of gas for at least 50 minutes Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Table 5 6 DAS Data Channel Editing Step Action Comment 1 Press SETUP DAS EDIT Enter DAS menu to edit Data Channels 2 Press PREV NEXT Select Data Channel to edit 3 Press EDIT Enter the Edit menu for the selected Data Channel 4 Press SET gt 5 times Scroll through Data Channel properties until RS 232 REPORT OFF is displayed 5 Press EDIT Edit selected setup property 6 Toggle OFF to ON Change RS 232 REPORT property 7 Press ENTR Accepts change 8 Press EXIT 4 times Exits back to sample menu 5 3 4 Range Menu The instrument operates on any full scale range from 5 to 2000 ppb The range is the concentration value that equals the maximum voltage output on the rear panel of the instrument Th
120. g from the PMT this reading is adjusted using certain other factors to produce an accurate reading for the Factory Calibration procedure table continued 9 5 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev Table 9 1 Test Functions Continued Test Function Factory Set Up Comment PREREACT Check value in Final Test Values Table 2 1 PREREACT is the current value of the Pre reactor circuit reading The number typically should be 0 mV 15 35 ifthe instrument is sampling zero air When the M200AU is in SAMPLE mode readings may be higher if sample gas contains hydrocarbons If a problem is suspected check the Pre reactor and NO NO valves for cross port leaks Use Diagnostic mode to manually switch the valves while checking for leaks and correct operation HVPS 450 900 VDC This represents the scaled up HVPS programming voltage to the HVPS The design of the HVPS precludes taking a single reading that indicates the health of the supply Refer to the HVPS Troubleshooting Section 9 3 8 5 for a procedure for testing the HVPS This TEST function is used primarily to set the HVPS voltage value A value not in the 450 to 900 volt range indicates problems with the HVPS supply DCPS 2500 200 mV DCPS is a composite of the 5 and 15 VDC supplies It has been arbitrarily set at 2500 200 mV If it is not in this range one of the voltages in the supply is not working
121. general calibration is the process of adjusting the gain and offset of the M200AU against some recognized standard The reliability and usefulness of all data derived from any analyzer depends primarily upon its state of calibration In this section the term dynamic calibration is used to express a multipoint check against known standards and involves introducing gas samples of known concentration into the instrument in order to adjust the instrument to a predetermined sensitivity and to produce a calibration relationship This relationship is derived from the instrumental response to successive samples of different known concentrations As a minimum three reference points and a zero point are recommended to define this relationship The true values of the calibration gas must be traceable to NIST SRM s Section 2 0 7 Q A Handbook Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F All monitoring instrument systems are subject to some drift and variation in internal parameters and cannot be expected to maintain accurate calibration over long periods of time Therefore it is necessary to dynamically check the calibration relationship on a predetermined schedule Zero and span checks must be used to document that the data remains within control limits These checks are also used in data reduction and validation Table 7 9 summarizes the initial quality assurance activities for calibrating equipment Table 7 10 is a matrix for
122. ger Refer to Figure 9 4 for the jumper settings for the desired analog output voltage range Factory default setting is 0 5 Connect the power cord to the correct voltage line then turn to Section 2 3 Initial Operation Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 WARNING Analyzer Exhaust Sample Pump For brief periods after power up analyzer exhaust may contain ozone Make sure pump exhaust is routed to well ventilated area at atmospheric pressure WARNING Lethal voltages present inside case Do not operate with cover off during normal operation Before operation check for correct input voltage and frequency for both the analyzer and the sample pump Do not operate without proper chassis grounding Do not defeat the ground wire on power plug Turn off analyzer power before disconnecting electrical subassemblies 2 2 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Figure 2 1 Removal of Shipping Screws amp Check for Correct Power 2 3 Teledyne API Model 200AU NO Analyzer Instruction Manual 02293 Rev F SA E a2 27 2 Lu gm jC e gt lt lt oO 3 e O 5 02 6 2 Un lt 1 ae N DI MIU Q 22 VIA 5 85 5 85 ER do a N 2 m N E N 5
123. ght line within the 2 linearity criteria given for the NO and NO channels Determine the best straight line fit of the plot either by inspection or least squares The slope of the resulting straight line is the moly efficiency The value should be between 96 and 1 02 If not the moly needs to be replaced If you want the M200AU to automatically compensate Section 7 6 6 1 for converter efficiency enter the efficiency value in the front panel by CAL CONC MOLY SET then key in the slope from step 3 followed by ENTR Press EXIT to return to the SAMPLE menu 7 6 6 1 Automatic Moly Converter Efficiency Compensation The M200AU can automatically compensate the NO and NO readings for the molybdenum converter efficiency There are 2 ways to enter the converter efficiency into the instrument The first is to enter the efficiency as a decimal fraction using the CAL CONC MOLY SET menu The second method is to have the M200AU compute the efficiency using the CAL MOLY CAL menu The procedure is given in Table 7 14 To disable the compensation press CAL CONC MOLY SET and enter 1 0000 as the efficiency 7 23 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev Table 7 14 Automatic Calculation of Converter Efficiency Step Number Action Comment 1 Press From the SAMPLE mode the M200AU enters the Converter CAL CONC Efficiency menu and requests expected NO cal gas CONV NO2 concentration
124. heated to 315 C The converter s function is to reduce NO to nitric oxide NO The temperature control for this module is done by the Switch Card in the Power Supply Module using commands generated by the CPU The temperature is measured by a type J thermocouple and is conditioned on the Status Temp board The analog voltage representing the Moly temperature is read by the V F board and sent to the CPU where signals are generated for temperature control The digitized voltage is translated to degrees for the TEST function on the front panel and for warnings The molybdenum converter assembly also contains a catalytic ozone scrubber that removes excess ozone from the instrument exhaust Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 5 SOFTWARE FEATURES 5 1 Index To Front Panel Menus The M200AU has 2 main operating modes namely the SAMPLE and SETUP modes The instrument is operating in the SAMPLE mode when it is measuring gas The SETUP mode is used to create or change operating parameters such as range Also in SETUP mode the instrument has extensive fault diagnosis tools A list of M200AU operating modes is given in Table 5 8 The next several pages contain two different styles of indexes that will allow you to navigate the M200AU software menus The first two pages show a tree menu structure to let you see at a glance where each software feature is located in the menu The second menu contains a brief descript
125. hermistor 3 PMT and high voltage power supply 4 PMT cooler cold block heatsink fan 5 Preamp assembly Preamp range control hardware HVPS control PMT cooler temp control Electric test electronics moO Ww gt Optic test electronics 4 2 2 Pneumatic Sensor Board The sensor board consists of 2 pressure sensors and a flow sensor One pressure sensor measures the pressure in the reaction cell The reaction cell is maintained at about 0 1 atmospheric pressure The second pressure sensor measures the pressure just upstream of the reaction cell which is near ambient pressure From these two pressures the sample flow rate can be computed and is displayed as sample flow in the TEST menu Finally a solid state flow meter measures the ozone flow using a resistive bridge Likewise it is displayed as a TEST function The M200AU displays all pressures in inches of mercury absolute in Hg A Absolute pressure is the reading referenced to a vacuum or zero absolute pressure This method was chosen so that ambiguities of pressure relative to ambient pressure can be avoided Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 NOTE On vacuum vs absolute pressure Many vacuum gauges read relative to ambient pressure therefore a reading of 25 of mercury Hg at sea level which would give an absolute pressure of about 5 Hg in the reaction cell would read only 20 Hg at high altitude sites Therefore in this man
126. hours this is normal Allow the converter to burn in for 24 hours then re calibrate the instrument Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Figure 8 4 Molybdenum Converter Assembly 8 10 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 8 6 Pneumatic Line Inspection Particulate matter in the pneumatic lines will affect both flow rate and response time It is important that the pneumatic system be periodically inspected and thoroughly cleaned if necessary Clean by disassembling and passing methanol through three times Dry with nitrogen or clean zero air Also inspect all pneumatic lines for cracks and abrasion on a regular basis Replace as necessary Refer to the pneumatic diagram in Figure 8 5 Figure 8 6 and Figure 8 7 8 11 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F T Figure 8 5 Pneumatic Diagram Standard Configuration 8 12 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev Figure 8 6 Pneumatic Diagram with Zero Span Valve Option 8 13 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 11 Figure 8 7 Pneumatic Diagram with External Converter Option 8 14 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 8 7 Leak Check Procedure If a leak checker is not available it is possible to leak check the instrument using the M2
127. ime the ozone generator power is OFF until the membrane dryer has time to purge itself therefore there will be no response from the instrument even if span gas is coming in the sample port During this time temperatures and other conditions are out of specification Because many warning conditions could be displayed the software suppresses warning conditions for 30 minutes after power up After 30 minutes warning messages will be displayed until the respective warning conditions are within specifications Use the CLR key on the front panel to clear warning messages While waiting for instrument temperatures to come up you can check for correct operation by using some of the M200AU s diagnostic and test features Examine the TEST functions by comparing the values listed in Table 2 1 to those in the display Remember that as the instrument warms up the values may not have reached their final values yet If you would like to know more about the meaning and utility of each TEST function refer to Table 9 1 Also now is a good time to verify that the instrument was shipped with the options you ordered Table 2 1 also contains the list of options Section 6 covers setting up the options When the instrument is warmed up re check the TEST functions against Table 2 1 All of the readings should compare closely with those in the Table If they do not see Section 9 1 1 The next task is to calibrate the analyzer There are several ways to do a calibration
128. ing diagnosed or calibrated A list of M200AU operating modes is given in Table 5 5 5 22 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Table 5 8 M200AU Operating Modes Mode Description ZERO CAL D Automatic dynamic zero calibration ZERO CAL A Automatic zero calibration ZERO CAL Remote zero calibration ZERO CAL M Manual zero calibration SPAN CAL D Automatic dynamic span calibration SPAN CALA Automatic span calibration SPAN CAL Remote span calibration SPAN CAL M Manual span calibration M P CAL Manual multi point calibration DIAG ELEC Electrical diagnostic test DIAG OPTIC Optical diagnostic test DIAG OZONE Ozone generator diagnostic test DIAG AOUT D A output diagnostic test DIAG Main diagnostic menu DIAG I O Signal I O diagnostic DIAG RS232 RS232 output diagnostic SETUP x x Setup mode x x is software version SAMPLE ZS Sampling automatic dynamic zero and span calibration enabled SAMPLE Z Sampling automatic dynamic zero calibration enabled SAMPLE S Sampling automatic dynamic span calibration enabled SAMPLE A Sampling automatic cal enabled SAMPLE Sampling automatic cal disabled 5 4 Status Output The status output is an option that reports Analyzer conditions via contact closures on the rear panel The closures are available on a 50 pin connector on the rear panel The contacts are NPN trans
129. ion 1 Turns on quiet mode messages suppressed 2 Places analyzer in computer mode no echo of chars 4 Enables Security Features Logon Logoff 8 Enables API protocol and setup menus 16 Enable alternate protocol 32 Enable multidrop protocol NOTE To enter the correct value ADD the decimal values of the features you want to enable For example if LOGON and front panel RS 232 menus are desired the value entered would be 4 8 12 5 25 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Security Feature The RS 232 port is often connected to a public telephone line which could compromise instrument security If the LOGON feature is implemented the port has the following attributes 1 A password is required before the port will operate 2 If the port is inactive for 1 hour it will automatically LOGOFF 3 Repeat attempts at logging on with incorrect passwords will cause subsequent logins even with the correct password to be disabled for 1 hour 4 If not logged on the only command that is active is the 5 The following messages will be given at logon LOG ON SUCCESSFUL Correct password given LOG ON FAILED Password not given or incorrect LOG OFF SUCCESSFUL Logged off The RS 232 LOGON feature must be enabled from the front panel by setting bit 4 ofthe RS232_MODE variable in the VARS menu see Table 9 5 Once the feature is enabled to logon type LOGON 940331 940331 is the defau
130. ion of each key mnemonic and a reference to the section of the manual that describes its purpose and function in detail Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Figure 5 1 Sample Menu Tree 5 2 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Figure 5 2 Setup Menu Tree 5 3 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 5 1 1 Sample Menu Table 5 1 Sample Menu Menu Level M Reference Level 1 Level 2 Level 3 Level 4 Description Section TEST Test functions 5 2 1 Table 9 1 TST gt CAL Zero Span calibration w gas 5 2 2 1 7 1 through sample port CALZ Zero calibration w zero gas 23 2 2 2 7 2 73 from zero valve option CALS Span calibration w span gas 5 2 2 3 7 2 7 3 from span valve option ZERO Press ZERO then ENTR will 5 2 22 7 2 7 3 zero analyzer SPAN Press SPAN then ENTR will 5 2 2 3 1255 3 span analyzer CONC Expected NO NO span 7 1 concentrations and Moly conv efficiency setup NOX Enter expected NO span 5 2 2 Table 7 3 CONC concentration NO Enter expected NO span 5 2 2 Table 7 3 CONC concentration 5 4 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Table 5 2 Sample Menu Menu Level Levell Level 2 Level 3 Level 4 Description Section CONV Sub menu for converter 5 2 2 6 7
131. is fully warmed up and its operation has stabilized During the calibration the M200AU should be in the CAL mode and therefore sample the test atmosphere through all components used during normal ambient sampling and through as much of the ambient air inlet system as is practicable If the instrument will be used on more than one range it should be calibrated separately on each applicable range See Section 7 7 Calibration documentation should be maintained with each analyzer and also in a central backup file 7 10 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Table 7 10 Activity Matrix for Calibration Procedure Equipment Acceptance Limit Frequency And Method Action If Requirements Supplies Of Measurement Are Not Met Calibration Sec 2 0 7 Subsec 7 1 Assayed against an Working gas standard is gases Q A Handbook NIST SRM quarterly unstable and or procedure in Subsection 2 4 Q A Handbook also and Federal Register Converter efficiency gt 96 2 Section 7 6 5 3 this manual Federal Register and Figure 7 2 see Section 7 6 7 for frequency 3 Subsection 7 6 6 this manual Sec 2 0 7 Q A measurement method is Handbook out of control take corrective action such as obtaining new calibration gas Dilution gas Zero air free of See Return to supplier or take contaminants and appropriate action with Sec
132. istently 5000 mV that indicates an off scale reading Typical readings bounce around which is normal Normalized PMT Voltage Like the PMT Voltage TEST function above the NORMALIZED PMT VOLTAGE measures the PMT signal at the output of the preamp board The difference is that several normalization functions are applied to this signal before it is displayed The most important is the temperature and pressure compensation factors If NORM PMT is used as suggested in the Factory Calibration Procedure Section 9 1 6 the M200AU will be correctly calibrated PREREACT Voltage This test measurement is the Pre reactor voltage It indicates the most recent reading from the Pre reactor circuit The units are mV and readings up to 1000 are considered normal High Voltage Power Supply HVPS The HVPS reading is a measure of the scaled up HVPS programming voltage The voltage used to set the HVPS output is generated on the Preamp board Its value is between 0 and 1 volt corresponding to a voltage of 0 to 1000 volts out of the HVPS The HVPS front panel TEST measurement should be greater than 450 volts and will typically be 500 800 V Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 DC Power Supply DCPS The DCPS voltage is a composite of the 5 and 15 VDC voltages in the Power Supply Module This is meant to be a quick indicator to show if the PSM is working correctly The nominal value is 2500 mV 200 mV Reactio
133. istors which can pass 50 ma of direct current The pin assignments are listed in Table 5 9 5 23 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Table 5 9 Status Output Pin Assignments Output Pin Definition Condition 1 1 2 ZERO CLOSED IN ZERO CAL 2 3 4 SPAN CAL CLOSED IN SPAN CAL 3 5 6 FLOW ALARM CLOSED IF FLOW WARNING 4 7 8 TEMP ALARM CLOSED IF ANY TEMP WARNING 5 9 10 DIAG MODE CLOSED IN DIAG MODE 6 11 12 POWER OK CLOSED IF SYSTEM POWER OK 7 13 14 SPARE 8 15 16 SPARE 9 17 18 SPARE 10 19 20 AUTORANGE HI CLOSED IF IN HIGH RANGE 11 21 22 SYSTEM OK CLOSED IF NO FAULTS PRESENT 12 23 24 RX CELL PRESS CLOSED IF ABS PRES gt 15 HG The Status Board schematic can be found in the Appendix Drawing 01087 5 5 RS 232 Interface The RS 232 communications protocol allows the instrument to be connected to a wide variety of computer based equipment The interface provides two basic functions in the M200AU 1 First is comprehensive command interface for operating and diagnosing the analyzer 2 The interface can also provide an audit trail of analyzer events In this function the port sends out messages about instrument events like calibration or warning messages If these messages are captured on a printer or remote computer they provide a continuous audit trail ofthe analyzers operation and status 5 24 Teledyne API Model 200AU NOx Analyzer
134. l automatically check zero and span AUTOCAL each day Optionally the Z S cycle can be moved backwards or forwards a fixed 7 4 time each day AUTOCAL setup is covered in Table 6 2 Dynamic Zero Span Calibration The AUTOCAL system described above can also optionally be used to calibrate the instrument once each 24 hours Dynamic Calibration is enabled by the CALIBRATE attribute in the AUTOCAL setup menu see Table 6 2 and Table 7 7 If calibration is initiated using the rear panel contact closures the DYN ZERO and DYN SPAN variables must be set to ON in the VARS menu Before proceeding with enabling DYNAMIC Z S you must setup the AUTOCAL feature Enabling AUTOCAL is described in Table 6 2 To enable DYNAMIC Zero Span Calibration Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev 7 5 Table 7 7 Enabling Dynamic Zero Span Step Number Action Comment 1 Press Causes the M200AU go to the AutoCal menu SETUP ACAL 2 Press PREV NEXT Select the sequence you want for dynamic calibration 3 Press SET Select the SET menu 4 Press PREV NEXT Scroll through the SET menu to the CALIBRATE attribute 5 Press EDIT Setthe CALIBRATE attribute value to ON to enable Dynamic Span 6 Press EXIT Causes the M200AU to return to SAMPLE mode With dynamic calibration turned on the instrument will re set the slope and offset values for the NO and NO channel each day This contin
135. lay CALS and CALZ buttons when the instrument is in SAMPLE mode The presence of the buttons indicates that the option has been enabled in software Troubleshooting the Z S valves l It is possible to manually toggle each of the valves in the DIAGNOSTIC mode Refer to Section 9 1 3 for information on using the DIAG mode Also refer to Figure 8 5 Figure 8 6 and Figure 8 7 for a pneumatic diagram of the system 9 64 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 9 3 10 Pneumatic System The pneumatic system is diagramed in Figure 8 5 Figure 8 6 and Figure 8 7 9 3 10 1 Leak Check CAUTION When doing a leak check do not pressurize the M200AU to greater than 15psi Damage to internal components will occur at higher pressures The basic cause of many performance problems is a leak Refer to Section 8 7 for the leak check procedure 9 3 10 2 Sample Pump Diagnostic Procedures The sample pump is capable of maintaining the reaction cell pressure at 3 4 Hg A If higher pressures are noted the pump may need servicing Check the pump inlet fittings and analyzer for leaks first If other causes have been eliminated rebuild the pump 9 65 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F INTENTIONALLY BLANK 9 66 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 10 M200AU SPARE PARTS LIST Use of replacement parts other th
136. les are user adjustable they are listed in Table 9 5 To access the VARS menu press SETUP MORE VARS ENTR Use the PREV NEXT buttons to select the variable of interest then press EDIT to examine change the value then press ENTR to save the new value and return to the next higher menu If no change is required press EXIT TPC_ENABLE The M200AU has temperature and pressure compensation T P comp adjusts the output of the instrument for changes in sample temperature reaction cell pressure and atmospheric pressure The temperature of the reaction cell controls the sample temperature The setpoint is 40 C and the value of the adjustment parameter is equal to 1 0000 when the reaction cell temperature is 40 C The temperature compensation increases sample concentration with increasing temperature to compensate for the drop in density of gas in the reaction cell The reaction cell pressure compensation factor is equal to 1 0000 when the cell pressure is about 3 5 Hg A The compensation factor increases sample concentration with increasing cell pressure to compensate for increased quenching of the chemilumenscent reaction at higher pressures The sample pressure compensation factor is equal to 1 0 at 29 92 Hg A This factor increases sample concentration with decreasing sample pressure to compensate for a lower head pressure on the sample flow orifice Taken together the three factors change the output of the instrument very little The sam
137. lids from dryer inlet by brushing Use clean dry air to blow any loose particles from the inlet Deionized water or dilute 5 10 conc HCI in deionized water hydrochloric acid can be passed through the dryer This should be done only with the dryer and at room temperature 2 Organic liquids and freons Rinse the inner and outer tubes using 1 1 1 trichlorethane Follow the solvent with dry air to purge the solvent 3 Inorganic salts and oxgenated hydrocarbons can be removed by rinsing with 10 nitric acid at 50 C 9 53 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev Figure 9 7 Ozone Generator Subsystem 9 54 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 9 3 7 Flow Pressure Sensor The flow pressure sensor board consists of 2 pressure sensors and a flow sensor See Figure 9 8 for a diagram of this board From these three sensors four values are computed and displayed on the front panel TEST functions They are 1 Ozone flow measured directly S3 R3 2 Reaction Cell Pressure measured directly S2 R2 3 Sample gas pressure measured directly 51 4 Sample Flow computed from sample pressure and reaction cell pressure S1 S2 The above pressures and flows are filtered to produce the front panel readings There is a small delay after adjustment for a steady reading when observing the TEST functions To adjust the OZONE flow 1 Go to DIAG mode by
138. ll then briefly put your finger over the fittings on the cell You should feel the vacuum build up Also note the difference between the high sample flow and the low ozone flow rate Another reliable method is to attach a rotameter or soap bubble flowmeter to the fittings to measure the flows Flow rate will change a few cc min due to changes in ambient air pressure such as cycling of air conditioning or passing weather fronts Changing altitude changes the ambient air pressure and therefore the sample flowrate This effect is about 15 20 cc min per 1000 feet of altitude change If required the output of the instrument can be compensated for pressure See Section 5 3 9 Table 9 5 table continued 9 4 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Table 9 1 Test Functions Continued Test Function Factory Set Up Comment OZONE FL 80 cc min 10 This is the Ozone flow It is measured by a solid state flow meter and thus is a true indication of flow If you suspect there is no ozone being generated disconnect the tube at the reaction cell and rub the end of the tube on your fingertips then sniff your fingers The odor of ozone should be readily apparent PMT 0 5000 mV 1 This is the instantaneous output of the PMT During normal operation the value varies widely as the M200AU switches from NO to NO to Pre reactor modes Changes in reading will be synchr
139. ll not power up 4 6 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev 4 2 6 Power Supply Module The Power supply module supplies AC and DC power to the rest of the instrument It consists of a 4 output linear DC power supply and a 15 volt switching supply In addition it contains the switching circuitry to drive the DC operated valves and several switched AC loads to operate the Rx cell heater the Moly heater and the ozone generator 4 2 7 Pump Valves Pneumatic System A standard M200AU comes with 2 valves The NO NO valve switches sample from either the sample inlet port or from the moly converter into the reaction cell Each NO NO cycle the Pre reactor valve re routes sample gas into the Pre reactor volume which allows time for the NO Ozone reaction to complete The pneumatic timing of the Pre reactor is set so that any hydrocarbon interferences are measured and eliminated from the signal The M200AU is equipped with a high performance pump capable of producing a reaction cell pressure of less than 4 Hg A See Figure 2 3 for hook up information A catalytic ozone scrubber protects the pump from the corrosive effects of ozone See Section 4 2 8 4 2 8 Ozone Generator Because of the instability of ozone it is necessary to generate this gas inside the analyzer The ozone generation module consists of a high frequency switching AC supply and pulse transformer connected to a silent discharge tube Ai
140. lt password The password can be changed to any number from 0 to 999999 by the variable RS232 PASS To change the password enter the command V RS232_PASS NNNNNN which sets the password to the value NNNNNN Protocol of Port Communication The RS 232 interface has two protocols of communication because if the port is attached to a computer it needs to have different characteristics than if used interactively Consequently there are two primary styles of operation terminal mode and computer mode When an operator is communicating with the analyzer via a terminal the analyzer should be placed into TERMINAL MODE which echoes keystrokes allows editing of the command line using the backspace and escape keys and allows recall of the previous command When a host computer or data logger is connected to the analyzer it should be placed into COMPUTER MODE which does not echo characters received or allow the special editing keys See Table 5 11 for relevant commands 5 26 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Table 5 11 RS 232 Switching From Terminal Mode to Computer Mode Key Function Control T ASCII 20 decimal Switch to terminal mode echo edit Control C ASCII 3 decimal Switch to computer mode no echo no edit If the command line doesn t seem to respond to keystrokes or commands one of the first things you should do is send a Control T to switch the command line interface in
141. lyzer Instruction Manual 02293 Table 9 1 Test Functions Continued Test Function Factory Set Up Comment MOLY TEMP 315 5 C Moly temp is controlled by the CPU to 315 C After cold start it requires about 30 min to come to temperature After temperature is reached temperature should not vary more than 5 C See Section 9 3 4 for troubleshooting Warning limits are lt 290 C and gt 320 RCEL PRESS 3 5 in Hg A RCEL is the pressure in the Reaction Cell The instrument is very sensitive to variations in reaction cell pressure A 10 change in output per 1 Hg pressure is typical The pressure reading will change when the NO NO and Pre reactor valves switch otherwise it should remain constant The reaction cell pressure will be lower at higher altitude due to lower pump back pressure Pressures higher than the acceptable range will decrease instrument noise performance and sensitivity SAMP PRESS 29 5 Hg at sea level The sample pressure is taken upstream of the reaction cell It usually runs about 0 5 less than ambient pressure due to the restrictions in the sample intake tubing Sample pressure should be within 1 Hg of atmospheric pressure The pressure sensor used reports absolute pressure and therefore is sensitive to altitude weather fronts and room air conditioning Changes due to altitude is about 1 per 1000 ft other changes are 0 4 maximum Pressurizing the s
142. may be different than 2000 mV since the overall calibration affects ELECTRIC TEST See Section 9 1 6 for factory calibration procedure 9 16 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev 4 To turn off ET press EXIT If ET is a steady 2000 500 mV that means the Power Supply Module Preamp buffer amplifier V F CPU and display are all working properly 9 1 3 3 Optic Test Optic test turns on a small LED inside the PMT housing which simulates the signal from the reaction cell OT tests the entire signal detection subsystem By observing the level noise and drift of this test correct operation of many sections of the analyzer can be verified The implementation of OT involves several changes to the instrument operating conditions The M200AU does the following when switching to optic test 1 Saves the current instrument setup as to autorange indep range current range and places the instrument into the 2000 ppb range 2 Turns off power to the ozone generator to assure there is no interfering light from the reaction cell Disables the PRE REACTOR circuit 4 Turns on the OT LED 95 Procedure 1 Scroll the TEST function to PMT 2 Press SETUP MORE DIAG then scroll to OPTIC TEST by pressing the NEXT button When OT appears press ENTR to turn it on 3 The value in PMT should come up to 2000 mV 1000 mV in less than 15 sec 4 To turn off OT press EXIT Ifthe PMT reading observed in st
143. mine the NO conc NO our required at the output manifold using Equation 7 2 NO our 0 5 ppm 90 100 0 45 ppm 3 Calculate the NO flow Fxo required to generate NO our using Equation 7 3 _ 0 45 ppm x 3300 cm min F yo wi 50 5 ppm 4 Calculate the required flow rate through ozone generator Fo using Equation 7 4 294 min 50 5 ppm x 294 cm min x 180 cm Fo 2 75 497180 cm min 294 cm min 282 cm min 7 15 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 5 Verify that the residence time tr in the reaction chamber is lt 2 min using Equation 7 5 180 cm 0 58 min 282 cm min 29 5 cm min 6 Verify the dynamic parameter specification Pr of the calibrator reaction chamber using Equation 7 6 3 3 Pr 50 5 ppm x tem 3 x Eon em 37 2 75 ppm 282 cm mint 29 4 cm min 282 cm mint 29 4 cm min fe Calculate the diluent air flow Fp required at the mixing chamber using Equation 7 7 Fp 3300 cm min 282 cm min 29 4 cm min 2988 6 cm min 7 6 5 Dynamic Multipoint Calibration Procedure The procedure for calibration of chemiluminescent NO analyzers by GPT is specified in the Federal Register This section applies the general procedure to the specific case of the M200AU Calibration must be performed with a calibrator that meets all conditions specified in
144. mpute the NO and NO concentrations the formula for a straight line is used Where y the NO or NO concentration m the slope x the conditioned PMT tube output b the offset y mx b In comparison with analog analyzers the slope term is equivalent to the span pot and the b term is equivalent to the zero pot Again like an analog analyzer there is only a limited range of adjustment allowed for either term and there are consequences of having the values near the high or low limits of their respective ranges The x term is the conditioned PMT signal PMT signal is adjusted for the Pre reactor background range temperature and pressure The offset b term is the total background light with the Pre reactor term subtracted out The Pre reactor term measures detector dark current amplifier noise and ozone generator and hydrocarbon background After every zero or span calibration it is very important to check the QUALITY of the calibration The calibration of the M200AU involves balancing several sections of electronics and software to achieve an optimum balance of accuracy noise linearity and dynamic range See Section 7 8 for the calibration quality check procedure Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 5 2 2 6 Automatic Converter Efficiency Compensation The M200AU can automatically compensate the NO and NO readings for the molybdenum converter efficiency There are 2 ways to
145. n including excessive zero or span drift of possible significant inaccuracy of the analyzer Following any of the activities listed above the zero and span should be checked to determine if a calibration is necessary If the analyzer zero and span drifts exceed the calibration limits in Table 9 1 of Section 2 0 9 Subsection 9 1 3 Q A Handbook a calibration should be performed 7 6 8 Other Quality Assurance Procedures Precision is determined by a one point check at least once every two weeks Accuracy is determined by a three point audit once each quarter Essential to quality assurance are scheduled checks for verifying the operational status of the monitoring system The operator should visit the site at least once each week Every two weeks a Level 1 zero and span check must be made on the analyzer Level 2 zero and span checks should be conducted at a frequency desired by the user Definitions of these terms are given in Table 7 16 In addition an independent precision check between 0 08 and 0 10 ppm must be carried out at least once every two weeks Table 7 16 summarizes the quality assurance activities for routine operations A discussion of each activity appears in the following sections To provide for documentation and accountability of activities a checklist should be compiled and then filled out by the field operator as each activity is completed For information on shelter and sample inlet system an in depth study is in
146. n Cell Temperature This is a measurement of the temperature of the reaction cell It is controlled by the computer to 40 1 C Temperatures outside this range will cause the M200AU output to drift Box Temperature This TEST function measures the temperature inside the chassis of the M200AU The temperature sensor is located on the Status Temp Board Typically it runs 2 to 10 C higher than the ambient temperature PMT Temperature The temperature of the PMT is closely controlled by a dedicated proportional temperature controller The nominal set point is 5 1 Readings outside this range will cause instrument drift due to gain changes in the PMT detector Block Temperature The temperature of the sample flow and ozone flow control orifice blocks The nominal set point is 40 1 C Readings outside this range will cause instrument drift Moly Temperature The moly temperature is controlled by the computer The nominal set point is 315 5 C The temperature sensor inside the moly is a type J thermocouple The thermocouple amplifier is located on the STATUS TEMP board If the thermocouple breaks the reading will go to 500 C and remove power from the heater Reaction Cell Pressure The pressure in the reaction cell is measured by a solid state pressure sensor which measures absolute pressure This pressure will vary depending on several things 1 The type of pump attached to the analyzer 2 Variations in local weath
147. n mu E pa Dui een for PermaPure Replace every 12 Drier months Reaction Cell Clean annually or as Window necessary me a a 272 Sample Flow CE Check every year Moly Converter efficiency ME 6 months Examine every 12 Pneumatic Lines months clean if co or after repairs Leak Check Check every year Replace if seal is 8 2 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 8 2 Replacing the Sample Particulate Filter The particulate filter should be inspected often for signs of plugging or contamination It is also common for dirt particles to absorb NO thus causing those readings to be low To check and change the filter l Fold down the M200AU front panel 2 Locate the filter on the left side of the analyzer front panel See Figure 8 1 for an exploded view of the filter assembly 3 Visually inspect the filter through the glass window 4 If the filter appears dirty unscrew the hold down ring remove the teflon o ring and then the filter 5 Replace the filter being careful that the element is fully seated in the bottom of the holder Replace the teflon o ring then screw on the hold down ring and hand tighten 8 3 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Figure 8 1 Replacing the Particulate Filter 8 4 Teledyne API Model 200AU NOx Analyzer Ins
148. n routine press CAL To calibrate the 4 mA zero point press the UP UP10 DN DN10 then press ENTR The M200AU will then output 20 mA Press the UP UP10 DN DN10 buttons to calibrate the span point then press ENTR po AD 9 Repeat steps 2 6 for each channel that needs to be calibrated 9 43 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F AU 000 AU AOL AU 009 AU 09 AS 006 AU ZI Al AU 06 AW ZL AWOOL 11 25 11 25 39NVM 10 06 JO OL nid1no 757576 NOILO3S 335 4 A 304 39W110A 1398Vl 3l1VAIXOMNddV 430 110 39NV3N3N3AO Ino FivosTing L 440 S 7 NO 9 001 110 9 NO S AI SIONVI 110 9 5 NO 7 AS iene snc 110 9 6 NO A0L 11 2511 430 1 0 YVIOdINN 1140 20 0 1 av10dl8 3N10dl8 2 1 NOILISOd SON 5 NOILONN HOLIMS NIOd ON _ MORS 4 1ndino 7140 SNOILISOd HOLIMS Y3HLO v NO Y ONY SNOILISOd HOLIMS JONVUZYIAO HLIM 31VOSTIn4 LIOAS YWIOdI8 ovd 1S3 Zz dAV en no 4 N ASI AS ings VIF Board Sett 9 44
149. nd timing requirements of the protocol very carefully Problems arise when trying to specify connectors and wiring diagrams that attach the analyzer to various devices 9 3 2 1 RS 232 Connection Ifthe RS 232 port is not working check the following Physical Wiring First is to get the physical wiring hooked up correctly Refer to Figure 9 3 for the wiring diagram ofthe DB 9 plug on the M200AU rear panel There are 2 features that make connecting the wiring easier First is the red green LED s on the rear panel The M200AU provides the power to run the red LED the external equipment will provide the power for the green LED If the wiring is hooked up correctly both LED s will be illuminated Secondly there is a DTE DCE switch this switch interchanges pin 2 amp 3 on the DB 9 connector Set the DTE DCE switch so that both LED s are illuminated RS 232 Protocol BAUD rate Data bits Parity Second is to get the communication protocol for each instrument to match In Figure 9 3 the default RS 232 parameters are listed The BAUD rate can be changed in the software menus under SETUP MORE COMM BAUD Data Communications Software for a PC You will need to have a software package to enable the computer to transmit and receive on its serial port There are many such programs we use PROCOMM at Teledyne API Once you set up the variables in PROCOMM and your wiring connections are correct you will be able to communicate with the analyzer
150. ning quickly and verify its correct operation As time passes more detailed information is often required on special configurations calibration alternatives and other operational details Finally there is the need for periodic maintenance and to quickly troubleshoot problems to assure maximum reliability and data integrity To address these needs we have created three indexes to the information inside They are Table of Contents Outlines the contents of the manual in the order the information is presented This is a good overview of the topics covered in the manual There is also a list of Tables and a list of Figures Index to M200AU Front Panel Menus The Menu Index Figure 5 1 Figure 5 2 Table 5 1 and Table 5 2 briefly describes the front panel menus and refers you to other sections of the manual that have a detailed explanation of each menu selection Troubleshooting Section 9 The Troubleshooting Section outlined in the Table of Contents allows you to diagnose and repair the instrument based on variables in the TEST menu the results of DIAGNOSTIC tests and performance faults such as excessive noise or drift The troubleshooting section also explains the operation adjustment diagnosis and testing of each instrument subsystem If you are unpacking the instrument for the first time please refer to Getting Started in Section 2 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F INTENTIONALLY
151. nning multi point calibration NOX xxxxx PPB NO xxxxx PPB NO2 xxxxx PPB FINISH MULTI POINT CALIBRATION Finished multi point calibration Depends on software options installed Depends on which units are currently selected 5 5 6 DIAGNOSTIC Commands and Messages When Diagnostic mode is entered from the RS 232 port the diagnostic mode issues additional status messages to indicate which diagnostic test is currently selected Examples of Diagnostic mode messages are D D DDD HH MM EXIT DIAGNOSTIC MODE DDD HH MM ENTER DIAGNOSTIC MODE Example of turning on the Ozone Generator via the RS 232 port D D D The following is a summary of the Diagnostic commands ENTER SIG OZONE_GEN ON EXIT 5 36 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Table 5 21 RS 232 Diagnostic Command Summary Command Description Command Description D id LIST Prints all I O signal values See Table 9 4 for Signal I O definitions D id name value Examines or sets I O signal For a list of signal names see Table 9 4 Must issue D ENTER SIG command before using this command D id LIST NAMES Prints names of all diagnostic tests D id ENTER SIG D id ENTER OT D id ENTER ET Executes SIGNAL I O diagnostic test Executes Optic Test diagnostic test Executes Elect Test diag
152. nostic test Example of Ozone Generator diagnostic is in Section 5 5 6 Use D EXIT to leave these diagnostic modes D id EXIT Must use this command to exit SIG ET or OT Diagnostic modes D id RESET Resets analyzer software same as power on D id RESET RAM Resets analyzer software and erases RAM Erases NO NO conc values Keeps setup variables and calibration same as installing new software version D id RESET EEPROM Resets analyzer software and erases RAM and EEPROM Returns all setup variables to factory defaults resets calibration Pre reactor values 5 5 7 DAS Commands and Message The M200AU contains a flexible and powerful built in data acquisition system DAS that enables the analyzer to store concentration data as well as diagnostic parameters in its battery backed memory This information can be printed out through the RS 232 port The diagnostic data can be used for performing Predictive Diagnostics and trending to determine when maintenance and servicing will be required To print out the properties of all ofthe data channels enter D PRI NT To print the properties of just a single data channel enter D PRINT name For example to print the properties of the CONC data channel enter D PRINT CONC 5 37 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F To print records from a DAS data chann
153. now ready to measure sample gas 2 9 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Figure 2 4 Front Panel 2 10 Teledyne API Model 200AU NO Analyzer Instruction Manual 02293 Rev gt El 2 5 SUPPLY MOD T nod AH I 1 O O o lu A PARLA x y O 2 N E DE Lb na MON Rene VA to VA A4vOg y A 7 Pa JYVOd d E fa E V m O E Figure 2 5 Assembly Layout Teledyne API Model 200AU NO Analyzer Instruction Manual 02293 Rev F Table 2 1 Final Test and Calibration Values Test Values s Units Nominal Range Reference Section RANGE ppb 5 2000 5 3 4 STABILITY ppb 0 001 2000 9 1 1 9 2 5 Table 9 1 SAMP FLW cc min 1000 100 9 3 7 Table 9 1 OZONE FL cc min 80 15 9 3 6 9 3 7 PMT mV 0 5000 9 3 8 1 Table 9 1 PR
154. ns 7 5 and 7 6 are satisfied calculate the diluent air flow Fp using Equation 7 7 Fp Fr Fo Equation 7 7 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 7 6 4 3 Example Calculation Following is an example calculation that can be used to determine whether an existing GPT calibrator will meet the required conditions for a specific calibration For this example it is assumed that only the volume of the reaction chamber Vrc and the concentration of the NO standard NO srp are known All flow settings Fo and Fp will be calculated In many uses these flow settings are known and need only to be substituted in Equations 7 5 and 7 6 to verify the required conditions Before doing any calculations the URL and flow demand of the analyzer being calibrated must be known For the M200AU Upper range limit 0 5 ppm Flow demand 1000 cm min Volume of calibrator reaction chamber is determined by physical measurement Vrc 180 cm The concentration of the NO standard gas to be used is determined by reference against an NIST SRM Section 2 0 7 Q A Handbook NO stp 50 5 ppm 1 Determine the total flow Fr required at the output manifold using Equation 7 1 Fr 1000 cm min 110 100 1100 cm min Because low flows are difficult to control and measure it is often advantageous to set a higher total flow than needed In this example we will let Fr 3300 cm3 min 2 Deter
155. nt during initial warm up or if the connector to the heaters is not plugged in after dis assembly It has also occurred if the thermistor is not in position in the reaction cell PMT TEMP WARNING PMT temp out of spec The PMT temp has its own proportional controller on the preamp board Warnings might occur during warmup A warning can occur if the 7 pin connector to the interior of the sensor is not plugged in The power connector to the PSM should be checked for proper voltage 15 VDC 0 5 MOLY TEMP WARNING Molycon temp out of spec The Moly temp is controlled by the CPU It has a thermocouple with amplifier on the Status Temp board Because of the high temperature of the Moly 315 C the moly temp warning will tend to be the last warning to clear as the instrument is powered on table continued 9 9 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Table 9 2 Front Panel Warning Messages Continued Message Description CANNOT DYN ZERO Dynamic zero cal out of spec The reading of the PMT was too high for the ZERO button to appear Make sure the instrument is receiving zero gas Check for dirty reaction cell Do the factory calibration procedure located in Section 9 1 6 CANNOT DYN SPAN Dynamic span cal out of spec The reading of the PMT was too high or low for the SPAN button to appear Make sure the instrument is receiving correct concentration span gas
156. ntration parameters are printed on one line as shown below D 94 08 00 0200 CONC 120 0 100 0 20 0 The parameters are in the order of NO NO and To change any of the attributes of a particular data channel the channel attributes are edited from the front panel by pressing the EDIT key 5 5 8 Internal Variables A list of M200AU variables is shown in Table 9 5 A list of variables and their settings can be requested over the RS 232 port by V LIST Lists internal variables and values The output from this command is long and will not be shown here The general format of the output is value warning lo warning hi data lo to data hi Where name name of the variable value current value of variable warning lo lower limit warning displayed if applicable warning hi upper limit warning displayed if applicable data lo lower limit of allowable values data hi upper limit of allowable values 5 39 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev Variables can be changed Before changing the settings on any variables please make sure you understand the consequences of the change We recommend you call the factory before changing the settings on any variables The general format for changing the settings on a variable is V name value warn lo warn hi For example to change the warning limits on the box temperature type V BOX SET 30 10 50 and the CPU shoul
157. o the speed required by the modem and it should work If you are still experiencing problems a cable adapter may be needed Please contact the factory for assistance 9 3 2 2 RS 232 Diagnostic Procedures There are several features of the M200AU to make connecting to RS 232 and diagnosing RS 232 faults easier There are two LED s on the rear panel Connector Board which are connected to pin 2 and 3 of the DB 9 connector on the board If the switch is in the DCE position default the red LED is connected to pin 3 of the DB 9 connector When data is transmitted by the M200AU the red LED will flicker indicating data present on this line When the M200AU is running the LED will normally be ON indicating logic low A one second burst of data can be transmitted over the port by a command in the DIAGNOSTIC menu Press SETUP MORE DIAG then scroll to RS232 OUTPUT Each time you press ENTR the instrument transmits a 1 sec burst of lower m case w s The green LED is connected to pin 2 if the switch is in the default DCE position This is the pin on which the M200AU receives data The LED is ON if an outside device is connected This LED gets its power from the outside device When data is being transmitted by the outside device to the M200AU this LED will flicker When you are attempting to configure the RS 232 port if either of the LED s go out when the cable is connected that generally means that there is a grounding problem Switching the
158. oa oa mm oa uu DO DO oa oa oa DO O oa oa DO oa oa DO Umm Figure 9 2 CPU Board Jumper Settings 9 34 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Like the display the overall functioning of the CPU can be confirmed by a simple test Locate the CPU board on the mother board by referring to Figure 2 5 Power the instrument on Locate the red LED at the top left edge of the board It should be flashing at a frequency of about once per second u NND This flashing indicates the board is powered up and is executing instructions Testing and operation of the CPU RS 232 port is described in Section 9 3 2 It is possible for the UART driver chip to malfunction in either the input or output port or both 9 3 1 3 Front Panel Keyboard The keyboard consists of 8 keys and 3 LED s Key strokes are sent to the SBC40 computer s parallel port The computer software detects the key strokes via interrupts The bottom line of the display consists of 40 characters which is divided into 8 5 character fields Each field defines the function of the key immediately below it The definition of the keys is variable and depends on the menu level of the software To check the operation of the keyboar
159. on as expected check Section 9 2 9 5 2 2 3 Span Pressing the SPAN key along with ENTR will cause the instrument to adjust the SLOPE value of the internal formula so the instrument displays the span value The expected NO and NO span concentrations must be entered before doing a SPAN calibration See Table 7 3 Like the Zero calibration the Span cal cannot be done with any concentration of span gas Ifthe signal level is outside certain limits the SPAN key will not be illuminated If you encounter this condition see Section 9 2 8 It is also possible at low levels of span concentration that BOTH the ZERO and SPAN keys might be on thus allowing you to either zero or span the instrument In this case care must be taken to perform the correct operation or the analyzer can become mis calibrated 5 2 2 4 NO NO Cal Concentration Before the M200AU can be spanned it is necessary to enter the expected span concentrations for NO and NO This is done by using CAL CONC NOX or CAL CONC NO keys for NO and NO span concentrations respectively Concentration values from 1 to 2000 ppb are valid 5 14 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev 5 2 2 5 Formula Values The slope and offset terms should be checked after each calibration The values for these terms contain valuable information about the internal health of the analyzer The range of acceptable values and their meanings is given in Section 7 8 To co
160. on isolated current loop Switch State Comment 3 ON Use for non isolated current loop or 10 V output 4 OFF Use for non isolated current loop or 10 V output 5 OFF Use for non isolated current loop or 10 V output 6 OFF Use for non isolated current loop or 10 V output 5 V output or isolated current loop Switch State Comment 3 OFF Use for isolated current loop or 5 V output 4 ON Use for isolated current loop or 5 V output 5 OFF Use for isolated current loop or 5 V output 6 OFF Use for isolated current loop or 5 V output 1 V output Switch State Comment 3 OFF Use for 1 V output 4 OFF Use for 1 V output 5 ON Use for 1 V output 6 OFF Use for 1 V output 100 mV output Switch State Comment 3 OFF Use for 100 mV output 4 OFF Use for 100 mV output 5 OFF Use for 100 mV output 6 ON Use for 100 mV output 9 42 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev 1 After the switches and jumpers are set turn on instrument power and complete the following A Press SETUP MORE DIAG then press ENTR Scroll to D A CALIBRATION press ENTR Press ADC to select the first task which is to calibrate the A D converter B Connect aDVM ground lead to TP3 AGND on the V F board Connect the positive lead to TP9 DACO C The M200AU will display a voltage near 1 of the voltage range set in the above procedure See Figure 9
161. on of analyzer A Check for AC Power Section 9 2 1 Do flow checks Section 9 2 2 S C Confirm that sample gas contains NO or NO Check instrument electronics A DoELEC TEST procedure in DIAGNOSTIC menu Section 9 1 3 2 Do OPTIC TEST procedure in the DIAGNOSTIC menu Section 9 1 3 3 C Ifthe M200AU passes ET and OT that means the instrument is capable of detecting light and processing the signal to produce a reading Therefore the problem is in the pneumatics or ozone generator w Check ozone generator subsystem Do the diagnostic test of the ozone generator subsystem in Section 9 3 6 Check for disconnected electrical cables to sensor module 9 27 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 9 2 4 Negative Output 1 3 Mis calibration The zero gas that was used to zero the M200AU contained some NO gas that is it had more NO gas than that of the sample air May also be caused by doing a zero calibration using ambient air If NO NO OFFSET TEST functions are greater than 150 mV reaction cell contamination is indicated Verify quality of zero air used it should have less than 1 ppt NO and correspondingly low equivalent values of interferent gasses Corruption of the Pre reactor filter If a significant signal was detected during the Pre reactor cycle that higher reading can enter the Pre reactor filter The value of the Pre reactor filter is subtracted from the current reading
162. onized with valve switching The PMT voltage values will be relatively constant when Electric test variation in the 2000 mV signal observed will be sampling errors of the V F board and preamp noise See Section 9 1 3 2 Optic test variation in the 2000 mV signal will be PMT dark current preamp HVPS plus item 1 above See Section 9 1 3 3 Sampling zero gas signal from 1 2 plus signal from ozone generator air Sampling pure NO span gas signal will be 1 2 3 above plus signal from chemiluminescent reaction Slight pulsations will be noticed as the M200AU switches from NO to NO This is due to differences in flowrates in each channel These differences are taken out in the calibration process resulting in slightly different slopes for the NO and NO channels Large pulsations when switching to the NO channel is indicative ofa bad moly converter When sampling zero gas the PMT reading should be less than 150 mV and relatively constant High or noisy readings could be due to Excessive background light which is caused by a possible contaminated reaction cell Humidity undried ambient air in the ozone generator feed air PMT recently exposed to room light It takes 24 48 hours for the PMT to adapt to dim light Light leak in reaction cell Improper slopes NORM PMT 0 5000 mV The Normalized PMT reading is to be used as the PMT reading during the FACTORY CALIBRATION procedure In addition to the raw mV readin
163. ont panel keyboard until DCPS test is displayed C The value displayed should read 2500 200 mV If the M200AU passes this test it has successfully digitized a 2500 mV composite voltage output from the Power Supply Module The signal should also be quiet 25 mV 2 Analog output channel test In the DIAGNOSTIC menu on the front panel there is a test that outputs a step voltage to the 4 analog outputs This test is useful for calibrating chart recorders and dataloggers attached to the M200AU The test can also be useful in diagnosing faults in the V F board A Turn on the instrument B Enter the SETUP MORE DIAG ENTR menu 3 Select the ANALOG OUTPUT test This causes the M200AU to output a 5 step voltage pattern to the 4 analog outputs on the rear panel The status of the test is shown on the front panel display The scrolling can be stopped at any voltage by pressing the key below the changing percentage display The values are 0 20 40 60 80 100 of whatever voltage range has been selected For example the voltages would be 0 1 2 3 4 5V if the 5V range had been selected 9 39 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev 4 Use aDVM on each ofthe analog output channels to confirm the correct voltages Ifthe voltages step but are the wrong values the V F board may be set up wrong or out of calibration See Section 9 3 3 1 for information on how to calibrate the V F board 5 Digital input channel
164. ont panel operation via Calibration Section 7 Manual Zero Span Check CALS and CALZ buttons 25 Automatic operation using Setup and use of AUTOCAL is described in Table 6 2 AUTOCAL and Section 7 3 3 Remote operation using the Setup described in Table 6 2 Operation of AUTOCAL RS 232 interface described in Section 5 3 2 and Section 7 Calibration A complete description of the RS 232 interface is available Order part number 01350 4 Remote operation using Section 7 7 Automatic operation using external contact external contact closures closures Truth Table 7 8 and Section 9 3 4 3 6 1 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Zero Span valves have 3 operational states 1 Sample mode Here both valves are un energized and sample gas passes through the sample cal valve and into the analyzer for analysis 2 Zero mode The sample cal valve is energized to the cal mode The zero span valve is un energized in the zero mode thus allowing zero gas to be admitted through the rear panel bulkhead fitting into the analyzer 3 Span mode The sample cal and the zero span valves are both energized and in the cal mode With both valves on span gas is admitted through a rear panel bulkhead fitting into the analyzer Zero air and span gas inlets should supply their respective gases in excess ofthe 1000 cc min demand of the Analyzer Supply and vent lines should be of sufficient length and diameter to pr
165. onverter temperature 1 Select TEMP TEST function on the front panel 2 Wait until the converter is up to temperature usually 30 45 min after a cold start 3 Adjust R6 until the voltage at pin 8 9 of Ul is 3 15 VDC The CONV TEMP TEST function will then read 315 4 Recheck the temperature 15 min later and re adjust if necessary 9 3 4 2 Display Brownout During low AC line conditions the display can lock up due to insufficient voltage When low line conditions are approaching this circuit senses the condition by monitoring the un regulated 5 VDC in the Power Supply Module If brownout conditions are met the DISP BROWNOUT line is asserted and the CPU sends a hardware RESET command to the display and sends a BRNOUT RESET pulse back to U4 Brownout conditions will be noticed by the display flashing every 8 seconds 9 46 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 9 3 4 3 Status Output Lines External Contact Closures The Status lines consist of 2 active input lines and 12 active output lines Additional circuits are present on the board but currently unused Individual lines are set or cleared under CPU control depending on the assigned alarm condition The CPU also monitors the 2 input lines for remote calibration commands The status inputs and outputs are terminated at the rear panel see Rear Panel Connector Board schematic diagram in the Appendix The output lines are opto
166. ough out of the instrument to remove the connector to the display and the RS 232 connector 3 The CPU board is attached to the larger board 8 16 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 4 Remove the board laying it down on an insulating surface such that the board edge pins on the PCB are on the left The PROM chip should be at the top center The current chip should be labeled with something like 2AUC8 See Figure 9 2 for prom location Gently pry the chip from its socket and replace it with the new chip Install the chip in the left end of the socket with the notch facing to the right Make sure that all of the legs insert into the socket correctly 5 Re attach the CPU board to the board and re attach the assembly to the motherboard 6 Turn the M200AU ON and observe the front panel display As the machine goes through the setup the version number will be displayed on the front panel It should read the same as the version number printed on the prom ds Re enter any non default settings such as RANGE or AUTOCAL Re enter the SPAN values in the CAL CONC menu Check all settings to make sure that expected setup parameters are present 8 Re calibrate the Analyzer so that the default slope and intercept are overwritten with the correct values 8 17 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F INTENTIONALLY BLANK 8 18 Teledyne API Model 2
167. ple temperature is essentially invariant and the cell pressure and sample pressure factors tend to cancel each other The resultant coefficient has no practical variation with pressure changes due to weather fronts Changes in altitude of 1000 feet usually change the output of the instrument by about 5 if compensation is turned off much less if it is operating Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Table 9 5 Model 200AU Variables Default Value T Name Units Value Range Description a i P T MEASURE MODE NONOX Selects the measurement mode of the M200AU NO measures NO only NO measures NO only and No 1 NONO measures NO NO and this is the default 2 TPC_ENABLE Logic ON ON OFF Temp Pres compensation enable 3 DYN_ZERO Logic OFF ON OFF Enable zero calibration when rear panel contacts are closed 4 DYN_SPAN Logic OFF ON OFF Enable span calibration when rear panel contacts are closed Time that data is not put into DAS after CAL or DIAG SFLOW_SET cc min 1000 400 1200 Nominal sample flow rate RS232_MODE Bit 0 99999 Value is SUM of following Field decimal numbers 1 enable quiet mode 2 enable computer mode 4 enable security feature 8 enable front panel RS 232 menus 16 enable alternate protocol 32 enable multidrop protocol CLOCK_ADJ Sec 60 Real time clock speed adjustment 9 20 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev
168. pressing SETUP MORE DIAG then select SIGNAL VO and press ENTR Select OZONE FLOW by using NEXT PREV keys 2 Adjust R3 so that OZONE FLOW reads 2000 mV This is the coarse adjustment 3 Press EXIT to return to the SAMPLE mode Select the OZONE FL TEST function Use a calibrated flow measuring device to make small adjustments in R3 to dial in correct flow To adjust the SAMPLE PRESSURE 1 Go to DIAG mode by pressing SETUP MORE DIAG then select SIGNAL VO and press ENTR Select SAMPLE PRESS by using NEXT PREV keys 2 Adjust R1 to read 4100 mV which will give approximately the correct pressure 3 Press EXIT to return to the SAMPLE mode Select SAMP TEST function Use calibrated absolute pressure meter to make small adjustments to R1 until the correct absolute pressure is displayed 29 92 in Hg A is the target value at sea level The rate of decrease is about 1 Hg per 1000 ft of altitude To adjust the REACTION CELL PRESSURE 1 Go to DIAG mode by pressing SETUP MORE DIAG then select SIGNAL VO and press ENTR Select RCELL_PRESS by using the NEXT PREV keys 2 Adjust R2 to read 1450 mV which will give approximately the correct pressure 3 Press EXIT to return to the SAMPLE mode Select RCEL TEST function Use a calibrated absolute pressure meter to make small adjustments to R2 until the correct absolute pressure is displayed The target value is about 5 in Hg A for the external Thomas pump in good condition at sea level 9
169. properly span please contact your local distributor or the Teledyne API factory Teledyne API s phone number is on the front page of this manual 9 24 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Figure 9 1 Span Calibration Voltage 9 25 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev 9 2 Performance Problems When the response from a span check is outside the control limits the cause for the drift should be determined and corrective action should be taken Some of the causes for drift are listed below NOTE It has been our experience that about 50 of all analyzer performance problems are sooner or later traced to leaks in some part of the system 1 Fluctuations in flow Such as leaks or plugged orifices 2 Lack of preventive maintenance Change in zero air source A Air containing NO leaking into zero air line B Saturation of charcoal and or Purafil scrubbers 4 Change in span gas concentration A Zero air or ambient air leaking into span gas line B Permeation tube or cal gas tank exhaustion 5 Leak in NO NO Pre reactor switching valves 6 Loose pneumatic fittings 9 2 1 AC Power Check 1 Check that power is present at main line power input Verify that correct voltage and frequency is present If unit is set for 240 VAC and is plugged into 115 VAC it will appear as no power fault 2 Check that the unit is plugged into a good
170. r if 5 3 4 4 connected to stack dilution probe PASS Password enable disable menu 5 3 5 ON OFF Enable disable password 5 3 5 checking CLOCK TIME Adjusts time on the internal 5 3 6 time of day clock DATE Adjusts date on the internal 5 3 6 time of day clock MORE Continue menus on next level down COMM RS 232 communications 5 3 8 5 5 control menu BAUD Sets the BAUD rate to 300 5 3 8 5 5 19 200 ID Sets the instrument ID 5 3 8 5 5 included on all RS 232 messages 5 8 Teledyne API Model 200AU NO Analyzer Instruction Manual 02293 Rev Table 5 5 Setup Menu Setup Menu 3 Level 1 Level 2 Level 3 Level 4 Description Rane Section VARS Internal variables 5 3 9 9 2 PREV PREV NEXT scroll up and 5 3 9 9 2 NEXT down through the VARS menu JUMP JUMP will go to variable EDIT number selected EDIT will allow editing ofthe selected variable DIAG Diagnostic menu 5 3 7 9 1 3 PREV PREV NEXT scroll up and 5 3 7 9 1 3 NEXT down through the DIAG menu SIG VO Examines changes analog and 9 1 3 1 digital internal signals ANALOG Writes a stepped analog output 9 1 3 5 OUT voltage to the 4 analog outputs D A CAL Calibrates V F board and the 9 1 3 6 analog outputs TEST Routes several internal signals 9 1 1 CHNL to TCHAN analog output used for diagnosis OPTIC Activates Optic Test feature 9 1 3 3 TEST ELEC Activates Electric Test feature 9 1 3 2 TEST 03 GEN Turns OF
171. r is supplied to the generator from a permeation type air drier A complete description of its function and service requirements can be found in Section 9 3 6 Although there are dangerous high voltages generated in the ozone generator they are isolated from the user by sealing the system in a single potted assembly The dry air supply for the ozone generator uses a membrane drier to supply air with a dew point of 0 C or less The exhaust side of the membrane is connected to the vacuum manifold at the rear of the instrument Normal room air contains enough water vapor to damage the generator and components downstream Because of this the ozone generator may not turn on immediately at power up A heated catalytic ozone scrubber located in the molybdenum converter assembly removes excess ozone from the instrument exhaust The delay is built into the instrument to allow the dryer to start operating and purge the system with dry air Table 4 2 details the conditions for turning on the ozone generator Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev Table 4 2 Ozone Generator Start up Timing De Lat Ozone Gen State Program Action Power up lt 1 hour ON at power up Gen ON immediately after power up gt 1 hour OFF at power up Wait 30 min then turn gen ON 4 2 9 Molybdenum Converter Ozone Scrubber The molybdenum converter is a stainless steel cartridge containing molybdenum chips
172. r to the instrument 2 Fold down the M200AU front panel 3 Disconnect the 26 line flat ribbon cable 12 that connects the computer parallel port to the keyboard 4 Turn on the M200AU power switch Observe the front panel display Ifthe display successfully completes its power on self test it will display a single underline character _ in the left most character of the top line of the display If this character is present the display is working properly 6 Power down the analyzer and re attach the cable to J2 and proceed to the next test 9 3 1 2 Single Board Computer The SBC40 is a full function computer designed for instrument control applications It consists of a 16 bit V40 microprocessor 2 serial and one parallel ports Standard Bus interface and 4 sockets for memory The memory sockets consist of 256k ROM containing the multitasking operating system and application code 8k EE prom containing the setup variables a 128k RAM and time of day clock to provide event timing services and a second 128k RAM The overall function of this board is quite complex therefore complete testing is not possible in the field 9 33 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F uu BO mm UUL mm ma Umm mm BO DO oa oa oa oa
173. ranges of Auto Range Key in the values desired then press ENTR 5 3 4 3 Independent Ranges Independent Ranges allows you to select different ranges for NO NO and To set up Independent Ranges press SETUP RNGE MODE IND then press ENTR To set the values press SETUP RNGE SET The M200AU will prompt you for the range of NO NO and NO channels Key in the desired range for each channel press ENTR after each value 5 3 4 4 Concentration Units The M200AU can display concentrations in ppb ug m3 units Concentrations displayed in ug m use 0 C 760 mm Hg for STP Consult your local regulations for the STP used by your agency The following equations give approximate conversions NO ppb x 1 34 NO ug m NO ppm x 1 34 NO mg m NO2 ppb x 2 05 NO2 ug m NO2 ppm x 2 05 NO2 mg m NH3 ppb x 0 76 NH3 ug m NH3 ppm x 0 76 NH3 mg m To change the current units press SETUP RNGE UNIT from the SAMPLE mode and select the desired units 5 20 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F NOTE You should now reset the expected span concentration values in the new units and re calibrate the instrument using one of the methods in Section 7 Changing units affects all of the RS 232 values all of the display values and all of the calibration values Example If the current units are in ppb and the span value is 400 ppb and the units are changed to ug m the span value is NOT re c
174. rs only Rack mount for external pump w o tray Stainless steel zero span valves 4 20mA isolated outputs Status outputs RS 232 output REN AE IS 1 micron sample filter 3 2 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 3 3 Warranty WARRANTY POLICY Prior to shipment Teledyne API equipment is thoroughly inspected and tested Should equipment failure occur Teledyne API assures its customers that prompt service and support will be available COVERAGE After the warranty period and throughout the equipment lifetime Teledyne API stands ready to provide on site or in plant service at reasonable rates similar to those of other manufacturers in the industry All maintenance and the first level of field troubleshooting is to be performed by the customer NON TELEDYNE API MANUFACTURED EQUIPMENT Equipment provided but not manufactured by Teledyne API is warranted and will be repaired to the extent and according to the current terms and conditions of the respective equipment manufacturers warranty GENERAL TELEDYNE API warrants each Product manufactured by Teledyne API to be free from defects in material and workmanship under normal use and service for a period of one year from the date of delivery All replacement parts and repairs are warranted for 90 days after the purchase If a Product fails to conform to its specifications within the warranty period Teledyne API shall correct such defect by
175. s can be readily checked out using Electric Test in Section 9 1 3 2 Section 3 Optics Optical section consisting of PMT HVPS Preamp and signal processing Refer to Section 9 1 3 3 on use of Optical Test Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev 3 yn A Check the TEST functions Compare the TEST functions to the factory values in Table 2 1 This will often provide important clues as to the problem Pay special attention to the NO and NO slopes The slopes are the software equivalent of the span pot on an analog instrument If the slopes are not 1 0 0 3 the gain has changed Check the Pre reactor PREREACT reading in the TEST functions Compare it to the value in the factory checkout Table 2 1 If the reading is significantly greater than the factory test value the reaction cell could be contaminated or there could be a light leak in the cell Verify this fault by turning the ozone generator off and see if the reading drops more than 25 mV Check for a change in cell pressure vacuum compare to value in Table 2 1 possible causes 1 Partially plugged ozone killer 2 Change of pump or malfunctioning pump 3 Plugged pneumatics 4 Change in altitude Check for pneumatic leaks perform the leak check procedure in Section 8 7 If slopes are different from each other by gt 1 this usually indicates a leak in the switching NO NO valve or improper calibration Ch
176. s displayed Auto range option allows 2 different ranges for all outputs and will automatically switch to the other range dynamically as concentration values require The TEST values will show the range the instrument is currently operating in and will dynamically display the alternate range as the range changes occur STABIL Check value in Final Test Values Table 2 1 The instrument stability is the Std Deviation of the last 50 min of NO conc data It is computed for the NO channel only The noise value only becomes meaningful if sampling a constant concentration for more than 50 minutes The noise value should be compared to the value observed in the factory check out Faults that cause high noise values are Gas leaks Light leak Faulty HVPS Defective Preamp board PMT recently exposed to room light 1 2 3 4 5 Outgassing Moly converter 6 7 Dirty contaminated reaction cell 8 Mis calibrated slope offset outside of limits SAMPLE FLW 1000 cc min 100 This is the instrument flow It is computed using the up stream and down stream pressures across the sample flow orifice This method can give a false flow indication if the orifice is plugged and the sample pump is creating a pressure drop It should be taken into account when diagnosing instrument faults A rapid method of determining if the orifice is plugged is to disconnect the sample and ozone tubes from the reaction ce
177. ss EXIT here without spanning the instrument Press ENTR Pressing ENTR actually changes the calculation equations and causes the instrument to read the NO and NO span concentrations Press EXIT M200AU returns to sampling Immediately after calibration data is not added to the DAS averages 7 5 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev 7 2 Manual Zero Span Check or Calibration with Zero Span Valves Option The Zero Span valve option can be operated from the front panel keyboard In the Zero Span valve option the zero and span gas come into the valves through ports on the rear panel of the instrument Table 7 5 Manual Zero Calibration Procedure Z S Valves Step Number Action Comment 1 Press CALZ The analyzer enters the zero calibrate mode This switches the sample cal and zero span valves to allow zero gas to come in through the zero gas inlet port in the rear panel When the CALZ button is pressed the adaptive filter is activated This allows the instrument to respond rapidly to concentration changes regardless of their magnitude Wait 10 min Wait for reading to stabilize at zero value Press ZERO If you change your mind after pressing ZERO you can still press EXIT here without zeroing the instrument Press ENTR Pressing ENTR actually changes the calculation equations forcing the reading to zero Press EXIT
178. ssembly 022220000 15 Vdc 4A Switching Power Supply FL0000001 Sintered Filter 002 024900 FL0000003 Filter DFU 036 040180 FM0000004 Flow Meter 0 1000 cc HE0000017 Heater Reaction Cell 12W HW0000020 Spring Flow Control HW0000036 TFE Thread Tape 48 FT KIT000028 Retrofit 37mm Retaining Ring Sample Filter KIT000029 Retrofit 47mm Retaining Ring Sample Filter KIT000029 Retrofit 47mm Retaining Ring Sample Filter OR0000001 Tubing 6 1 8 CLR OR0000002 O Ring Bearing Cell OR0000034 O Ring Input Output Mirror Detector OR0000042 O Ring Sensor Assembly OR0000044 O Ring Reaction Cell OR0000058 O Ring Sample Filter PS0000010 15V Switching Power Supply 025690000 Teledyne API Model 200AU Spare Parts List PU0000028 Pump 115V 60Hz M200AU PU0000030 Pump Rebuild Kit M200AU RL0000008 Solid State Relay 12 Vdc RL0000015 Solid State Relay 115 Vac SW0000006 Overheat SW Cell Oven SW0000008 Pressure Sensor VA0000024 Manifold Valve 3 Way Vent 022300000 DC Power Supply Board 022930000 Instruction Manual for M200AU 023180000 M200AU Expendables Kit DR0000002 PMT Desciccant Baggies 10 2 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Table 10 2 Teledyne API MODEL 200AU Expendable Kit 023180000 M200AU Expendables Kit Includes 002270100 Gasket Rx Cell Qty 12 4 003690100 Filter TFE 37 mm Qty 25 872 006300 1 FL0000001 Sintered Filter 002 02
179. st 10 minutes of data with the value being computed at the end of each NO NO cycle It is computed for the NO channel only The stability value only becomes meaningful if sampling a constant concentration for more than 10 minutes The value should be compared to the value observed in the factory check out The Stability reading on the front panel TEST functions is different than the STABIL reading found in the DAS Check the DAS in Section 5 3 3 for more information on the STABIL DAS Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Sample Flow The SAMPLE FLOW test function is computed from the pressure measured up stream of the sample flow orifice The pressure down stream of the orifice is also checked to assure the assumptions of equation are valid This will register variations in flow caused by changes in atmospheric pressure but will not detect a plugged sample flow orifice The nominal value is 1000 100 cc min Ozone Flow The OZONE FLOW test function is directly measured by a solid state flow meter Variations in this value indicate variations in ozone flow The nominal value for ozone flow is 80 15 cc min PMT Voltage The PMT VOLTAGE measures the PMT signal at the output of the preamp board The waveform of the PMT voltage can be complex and vary from near 0 mV when zero gas is in the reaction cell to 5000 mV when a high concentration of NO is being measured If the PMT reading is cons
180. st that you order a supplementary manual The RS 232 Interface Teledyne API part number 01350 This manual describes additional features of the port The Teledyne API RS 232 interface protocol has a multidrop capability This is why an optional ID number is permitted for all commands If you don t include the ID number in the command all of the instruments connected to the RS 232 interface will respond If you include the ID number in the command only the instrument whose ID number matches will execute the command 5 28 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Table 5 13 RS 232 Command Summary Commands Definition id Print help screen ZD is an optional instrument ID number T id LIST Print all active test messages T id LIST name or Print single test message name from Table 5 16 T id name W id LIST Print all active warnings W id CLEAR name or Clear single warning message name from Table 5 17 W id name C id command Execute calibration command from Table 5 18 D id LIST Prints all I O signal values D id name Print single I O signal value state D id name value Sets I O signal to new value D id LIST NAMES Lists diagnostic test names D id ENTER name Enters and starts name diagnostic test D id EXIT Exits diagnostic mode D id RESET Resets analyzer same as power on D id
181. struction Manual 02293 Rev 3 SPECIFICATIONS AGENCY APPROVALS WARRANTY 3 1 Specifications Ranges Noise at Zero Noise at Span Lower Detectable Limit Zero Drift Span Drift Lag Time Rise Time Fall Time Sample Flow Rate Linearity Precision Hydrocarbon Interference Temperature Range Temp Coefficient Humidity Voltage Coefficient Dimensions HxWxD Weight Analyzer Weight Ext Pump Pack Power Analyzer Power Analyzer Power Ext Pump Power Ext Pump Environmental Recorder Output Analog Resolution Status Option Measurement Units BD As defined by USEPA At constant temperature and voltage With adaptive filter gt 20 ppb change Electrical rating for CE Mark compliance 1ppb increments from Sppb to 2000ppb independent ranges or autoranging lt 25 ppt RMS lt 0 25 RMS of reading above 50 ppb 50 ppt RMS lt 0 1 ppb 24 hours 0 2 ppb 7 days 0 596 FS or 50 ppt RMS whichever is greater 7 days 20 sec 95 in 50 sec 95 in 50 sec 1000 cc min 10 1 of full scale or 0 1 ppb whichever is greater 0 5 of reading above 50 ppb Propylene rejection ratio gt 20 000 1 Ethylene rejection ratio gt 40 000 1 20 30 C within drift and noise specifications 5 35 C safe operating range 0 196 per C 0 95 RH non condensing lt 0 1 per V 7 Hx 17 Wx 23 6 D 18cm x 43cm x 61cm 43 Ibs 20 kg 21 Ibs 9 5 kg 100V 50 60 Hz 120V 60 Hz 230V
182. t fails the pressure test each fitting needs to be leak checked to find the location Be careful that the system is always pressurized so as not to draw soap solution into the plumbing system Make sure you dry off any accumulated bubble solution Refer to Figure 8 5 Figure 8 6 and Figure 8 7 for pneumatic diagrams The Sensor module can be leak checked as a unit using a 1 8 tubing fitting on top of the assembly The same rules as above apply 1 Pressurize to lt 15psi 2 After turning off pressure tester pressure should not drop more than 1 Hg in 5 minutes Light Leak Check Procedure 1 Scroll the TEST functions to PMT 2 Input zero gas 3 Shine a powerful flashlight or portable incandescent light at the inlet and outlet fitting and at all the joints of the reaction cell The PMT value should not respond to the light If there is a response tighten the joints or replace the tubing with new black PTFE tubing We often find light leaks are caused by o rings being left out of the assembly Prom Replacement Procedure Preparation If any setup changes such as RANGE AUTOCAL ON OFF etc have been made record the changes because all settings should be checked after the PROM is changed See Figure 9 2 for location of prom on CPU card 1 Turn the machine off 2 Remove the hold down screw that holds in the V F CPU assembly to the motherboard Disconnect the J9 power connector from the motherboard Gently lift the assembly far en
183. t has a gain of about 500 000 to 1 000 000 It is not possible to test the detector outside of the instrument in the field The best way to determine if the PMT is working is by using Optic Test OT operation is described in Section 9 1 3 3 The basic method to diagnose a PMT fault is to eliminate the other components using ET OT and specific tests for other sub assemblies 9 3 8 2 Reaction Cell Temp The CPU controls the reaction cell temperature It operates by reading a thermistor amplifier on the Status Temp board The CPU controls the temperature by toggling a bit on the V F board The V F board TTL logic controls a solid state switch on the switch board in the PSM The switched 115 comes out of the PSM to a connector near the underside of the reaction cell A warning message may be present during initial warm up or if the connector is not plugged in after cleaning the reaction cell 9 3 8 3 Preamp Board The NO Preamp Board is a multi function board providing circuitry to support the following functions 1 Preamp buffer amplifier physical range control hardware for the detector 2 Precision voltage reference and voltage generation and control for the PMT HVPS inside the sensor module 3 Constant current generator and adjustment for Optic Test LED 4 Voltage generation and adjustment for Electric Test 5 Thermistor amplifier control signal generation for the PMT cooler The setup and adjustment of items
184. te can be entered by pressing SETUP CLOCK DATE and entering the date in a dd mmm yy format If you are having trouble with the clock running slow or fast the speed of clock can be adjusted by selecting the CLOCK_ADJ variable in the SETUP MORE VARS menu The units of CLOCK_ADJ are seconds per day 5 3 7 Diagnostic Mode The M200AU Diagnostic Mode allows additional tests and calibrations of the instrument These features are separate from the TEST functions because each DIAG function has the ability to alter or disable the output of the instrument While in DIAG mode no data is placed in the DAS averages Details on the use of Diagnostic mode are in Section 9 1 3 5 3 8 Communications Menu The COMM menu allows the RS 232 BAUD rate to be set To set the BAUD rate press SETUP MORE COMM BAUD select the appropriate BAUD rate then press ENTR The instrument ID number can also be set This ID number is attached to every RS 232 message sent by the M200AU To set the ID press SETUP MORE COMM ID and enter a 4 digit number from 0000 9999 then press ENTR 5 3 9 Variables Menu VARS This menu enables you to change the settings on certain internal variables The VARS Table 9 5 is located in the Troubleshooting Section 9 1 4 5 3 10 M200AU Operating Modes The M200AU has 2 main operating modes that were discussed earlier in this section namely SAMPLE and SETUP modes In addition there are other modes of operation when the instrument is be
185. ternal connectors P2 and P3 See Figure 9 5 The 5 is used for operating the CPU The 15 is used in several locations for running op amps and IC s The 12 is used for operating fans and valves Switching Power Supply The switching power supply supplies 15 VDC at 4 A to the PMT cooler control on the Sensor Module The output is made available through J10 on the Switch Board There is a load resistor on the Switch Board to keep the output stable when little current is required from the supply Switch Board The Switch Board has many different functions It takes logic signals from the V F board and uses them to switch 4 115 VAC and 4 12VDC loads The board also contains the instrument central grounding tie point It routes unswitched AC and DC power as needed Connector J2 programs the power transformers to take 115 220 and 240 VAC inputs Power Transformers There are potentially 2 input power transformers in the instrument The multi tap transformer is in every M200AU and supplies input power for the Linear Power Supply board described above A second transformer T2 is added if 220 or 240 VAC input is required Input power selection is done via a programming connector P2 which provides the proper connections for either foreign or domestic power Circuit Breaker Power Switch The front panel contains a combination circuit breaker input power switch It is connected to the PSM through J6 on the Switch Boar
186. the M200AU 15 ST_RCEL PRESS YES Status Bit Reaction Cell Pressure alarm Logic High pressure out of acceptable range Logic Low pressure inside acceptable range 16 ST_ZERO CAL YES Status Bit Zero Calibration mode Logic High M200AU in Zero cal mode Logic Low Not in Zero cal mode 17 ST SPAN CAL YES Status Bit Span Calibration mode Logic High M200AU in Span cal mode Logic Low Not in Span cal mode 18 ST FLOW ALARM YES Status Bit Flow alarm Logic High Sample Ozone flow out of spec Logic Low Flows within spec 19 ST TEMP ALARM YES Status Bit Temperature alarm Logic High Rxcell Moly Box temps out of spec Logic Low Temps within spec 20 ST DIAG MODE YES Status Bit In Diagnostic mode Logic High M200AU in Diagnostic mode Logic Low Not in Diag mode 21 ST POWER OK YES Status Bit Power OK Logic High Instrument power is on Logic Low Instrument power is off table continued 9 14 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Table 9 4 Diagnostic Mode Signal I O Continued 22 ST_SYSTEM_OK YES Status Bit System OK Logic High No instrument warnings present Logic Low 1 or more alarms present 23 ST_HIGH RANGE YES Status Bit Autorange High Range Logic High M200AU in high range of
187. the instrument the value should be less than 150 mV typically less than 50 mV If you are getting a high reading the probable reasons are 1 The reading be temporarily high ifthe PMT has been recently exposed to room light If so let the instrument run for several hours with zero gas to get the PMT accustomed to low light levels 2 Leak that admits gas containing NO into the reaction cell 3 Contaminated reaction cell Remove and clean cell 4 Wet i e undried ambient air air in the ozone generator Check the PermaPure drier and associated plumbing for leaks and correct operation 5 Zero gas that isn t really zero Make sure you re not trying to zero the machine with ambient air or span gas 6 Pre reactor filter is corrupted with high readings To clear the Pre reactor filter input zero gas and wait for 15 minutes for the filter to clear 9 2 10 Non Linear Response Common causes are 1 A leak in the pneumatic system see Section 8 7 2 High zero background the PMT TEST function should be near 50 mV with zero gas Readings above 100 mV indicate a light leak contaminated reaction cell bad zero gas or wet air coming into the ozone generator If the reading is not less than 150 mV the instrument will not zero or span properly Check Section 9 2 9 3 Calibration device in error re check flowrates and concentrations especially at low concentrations If you are using a Mass Flow calibrator and the flow is lt
188. to achieve an optimum balance of accuracy noise linearity and dynamic range The following procedure checks the Slope and Offset parameters in the equations used to compute the NO and NO concentrations It is important that they fall within certain limits with respect to themselves and to each other For an explanation of the use of these terms in the concentration calculation see Section 5 2 2 5 The slope and offset parameters are similar to the span and zero pots on an analog instrument Just as in the analog instrument if the slope or offset get outside of a certain range the instrument will not perform as well The slope value will be slightly different on the NO and NO channels This is due to slight differences in pneumatic resistance in each pathway If the slopes are significantly different there is a calibration error or a cross port leak in the switching valve If there is a sudden large change in slopes after a calibration that usually indicates a change in reaction cell pressure This generally requires a Factory Calibration covered in Section 9 1 6 7 33 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F The offset value gives information about the background signal level Check the observed offset value against the factory value in Table 2 1 If significantly higher check Section 9 1 6 Also after calibration check the PREREACT TEST function reading and compare it against the factory checkout v
189. to terminal mode Also some communication programs remove CTRL T and CTRL C characters from the byte stream therefore these characters will not be sent to the analyzer Check your communications program owners manual Entering Commands in Terminal Mode In terminal mode all commands must be terminated by a carriage return commands are not processed until a carriage return is entered While entering a command you may use the editing keys shown in Table 5 12 Table 5 12 RS 232 Terminal Mode Editing Keys Key Function CR carriage return Execute command BS backspace Backspace one character to the left ESC escape Erase entire line Commands are not case sensitive you should separate all command elements i e keywords data values etc by spaces Words such as T SET LIST etc are called keywords and are shown on the help screen in uppercase but they are not case sensitive You must type the entire keyword abbreviations are not accepted NOTE To open the help screen Type and press the Enter key 5 27 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev 5 5 2 Command Summary The information contained in the rest of this section covers commonly used commands that are required to operate the instrument from a remote terminal If you are going to be writing computer programs to communicate with the M200AU i e operating the port in COMPUTER MODE we sugge
190. tomated Frequency checks or updating of the calibration relationship with a two point zero and span calibration improves the quality of the monitoring data by helping to keep the calibration relationship more closely matched to any changes drifts in the analyzer response LEVEL 2 ZERO AND SPAN CHECK A Level 2 zero and span check is an unofficial check of an analyzer s response It may include dynamic checks made with un certified test concentrations artificial stimulation of the analyzer s detector electronic or other types of checks of a portion of the analyzer etc Level 2 zero and span checks are not to be used as a basis for analyzer zero or span adjustments calibration updates or adjustment of ambient data They are intended as quick convenient checks to be used between zero and span calibrations to check for possible analyzer malfunction or calibration drift Whenever a Level 2 zero or span check indicates a possible calibration problem a Level 1 zero and span or multipoint calibration should be carried out before any corrective action is taken If a Level 2 zero and span check is to be used in the quality control program a reference response for the check should be obtained immediately following a zero and span or multipoint calibration while the analyzer s calibration is accurately known Subsequent Level 2 check responses should then be compared to the most recent reference response to determine if a ch
191. truction Manual 02293 Rev 8 3 Sample Pump Maintenance The external sample pump is capable of maintaining the cell pressure at better than 4 0 Hg A If a higher pressure is noted the pump may need servicing Check the pump and pneumatic system for leaks or rebuild pump The ozone scrubber is integrated into the molybdenum converter inside the instrument See Figure 8 2 for component locations 8 5 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Figure 8 2 Sample Pump Assembly 8 6 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 8 4 Cleaning the Reaction Cell The reaction cell should be cleaned whenever troubleshooting points to it as the cause of the trouble A dirty cell will cause excessive noise unstable zero or span or low response To clean the reaction cell it is necessary to remove the reaction cell from the sensor housing Use the following guide 1 Turn off the instrument power vacuum pump 2 Loosen the hold down screws for pneumatic sensor assembly and move the assembly to the side Disconnect the exhaust fitting and inlet fittings See Figure 8 3 Loosen four screws holding the reaction cell to the sensor Disconnect heater thermistor and lift the cell away ON The reaction cell will separate into two halves A The manifold assembly B The reaction block with reaction sleeve and window 7 The reaction sleeve and window
192. tton is pressed the adaptive filter is activated This allows the instrument to respond rapidly to concentration changes regardless of their magnitude 2 Wait 10 min Wait for reading to stabilize at the zero value 3 Press ZERO If you change your mind after pressing ZERO you can still press EXIT here without zeroing the instrument 4 Press ENTR Pressing ENTR actually changes the calculation equations 5 Press EXIT M200AU returns to the SAMPLE mode 7 6 5 2 NO NO Calibration Procedure Adjust the NO concentration to approximately 8096 of the URL of the NO channel The expected NO and NO span concentrations can be determined by measuring the cylinder and diluent flows and computing the resulting concentrations If there is any NO impurity in the NO standard gas it should be taken into account when the NO concentration is entered during the NO NO channel calibration This is done by ADDING the impurity concentration to the NO concentration to get the NO concentration for calibration Calculate the exact NO and NO concentrations as follows x NO Fr NO Jour Equation 7 8 Enter the respective concentrations using the procedure in Table 7 12 The expected span concentrations need not be re entered each time a calibration is performed unless they are changed Enter the expected NO and NO span gas concentrations 7 19 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293
193. ual re adjustment of calibration parameters can often mask subtle fault conditions in the analyzer It is recommended that if Dynamic Cal is enabled the TEST functions SLOPE and OFFSET values in the M200AU should be checked frequently to assure high quality and accurate data from the instrument Use of Zero Span Valves with Remote Contact Closure The Zero Span valve option can be operated using Remote Contact Closures provided on the rear panel See Figure 2 2 for connector location and pinout When the contacts are closed the analyzer will switch to zero or span mode The contacts must remain closed for at least 1 second and will remain in zero or span mode as long as the contacts are closed To calibrate the instrument at the end of the Zero Span valve cycle DYNAMIC CAL the CAL ZERO and CAL SPAN variables in the VARS menu must be set to ON The CPU monitors these two contact closures and will switch the Analyzer into zero or span mode when the contacts are closed for at least 1 second In order to do another remote check both contact closures should be held open for at least 1 second then may be set again Table 7 8 shows what type of check is performed based on the settings of the two contact closures Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 7 6 Table 7 8 Z S Valves Modes with Remote Contact Closure Ext Zero CC Ext Span CC Operation Contact Open Contact Open State when in SAM
194. ual the vacuum specification of 5 Hg pressure is given as an absolute pressure 5 Hg A reference against zero absolute pressure a perfect vacuum thus removing ambiguities for high altitude sites 4 2 3 Computer Hardware and Software CPU Board The M200AU Analyzer is operated by an V40 series micro computer The computer s multitasking operating system allows it to do instrument control monitor test points provide analog output and provide a user interface via the display keyboard and RS 232 port These operations appear to be happening simultaneously but are actually done sequentially based on a priority queuing system maintained by the operating system The jobs are queued for execution only when needed therefore the system is very efficient with computer resources The M200AU is a true computer based instrument The microprocessor does most of the instrument control functions such as temperature control valve switching Data collection and processing are done entirely in the CPU with the final concentration values being sent to a D A converter to produce the instrument analog output The computer memory is divided into 3 sections ROM memory contains the multi tasking operating system code plus the instructions that run the instrument The RAM memory is used to hold temporary variables current concentration data and data acquisition system data The EEPROM memory contains the instrument set up variables such as range and instr
195. uis iii 2 4 FIGURE 2 3 INLET AND EXHAUST 1 nnne hse 2 5 FIGUREZ 4 FRONT TANE ee 2 10 FIGURE 2 5 ASSEMBEY LAYOUT za see Eee 2 11 FIGURE 4 1 i e eco ei eie 4 2 FIGURE 5 1 SAMPLE MENG TREE ese is obe be a be bte 5 2 FIGURE 9 2 SETUP MENU TREE 22 42 22 4223 Aia 5 3 FIGURE 7 1 CALIBRATION SETUP Fett Eta pe e ches eoe eee 7 3 FIGURE 7 2 DIAGRAM OF GPT CALIBRATION 5 2020 7 18 FIGURE 8 1 REPLACING THE PARTICULATE FILTER nnn 8 4 FIGURE 8 2 SAMPLE PUMP ASSEMBIY 2 22 2 Ad Annan Ada Addex 8 6 FIGURE 8 3 REACTION CELL ASSEMBLY ini ee era 8 8 FIGURE 8 4 MOLYBDENUM CONVERTER ASSEMBLY 1 8 10 FIGURE 8 5 PNEUMATIC DIAGRAM STANDARD 8 12 FIGURE 8 6 PNEUMATIC DIAGRAM WITH ZERO SPAN VALVE OPTION 8 13 FIGURE 8 7 PNEUMATIC DIAGRAM WITH EXTERNAL CONVERTER OPTION 8 14 FIGURE 9 1 SPAN CALIBRATION VOLTAGE
196. ument ID number The EEPROM data is non volatile so the instrument can lose power and the current set up information is preserved 4 2 4 VIF Board The V F board is multifunctional consisting of A D input channels digital I O channels and analog output channels Communication with the computer is via a STD bus interface The computer receives all of the instrument data and provides all control functions through the V F board Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 4 2 5 Front Panel The front panel of the M200AU is shown in Figure 2 4 The front panel consists of a 2 line display and keyboard 3 status LED s and power switch Communication with the display keyboard and status LED s is done via the computer s on board parallel port The M200AU was designed as a computer controlled instrument therefore all major operations can be controlled from the front panel display and keyboard The display consists of 2 lines of 40 characters each The top line is divided into 3 fields and displays information The first field is the mode field A list of operating modes is given in Table 5 8 The center field displays TEST values The TEST functions allow you to quickly access many important internal operating parameters of the M200AU This provides a quick check on the internal health of the instrument The right hand field shows current concentration values of NO NO and The display scrolls between th
197. uttons are used to scroll through the parameters located in each record Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev The function of each of the default Data Channels is described below CONC PNUMTC CALDAT STABIL Samples NO NO and NO concentration data at one minute intervals and stores an average every hour with a time and date stamp Readings during calibration and calibration hold off are not included in the data The last 800 hourly averages are stored Collects sample flow and sample pressure data at five minute intervals and stores an average once a day with a time and date stamp This data is useful for monitoring the condition of the pump and critical flow orifice sample flow and the sample filter clogging indicated by a drop in sample pressure over time to predict when maintenance will be required The last 360 daily averages about 1 year are stored Logs new slope and offset every time a zero or span calibration is performed also records the sample concentration reading just prior to performing a calibration Logs the standard deviation of the last 50 minutes of NO data with readings taken 2 minutes apart i e 25 readings taken 2 minutes apart The collector operates in sliding window fashion with the oldest reading being deleted and a new reading added every 2 minutes A new value of STABIL is added to the data buffer every 2 minutes A time and date stamp is recorded
198. ws you to test each supply Adjustment of the HVPS is covered in the Factory Calibration Procedure in Section 9 1 6 To troubleshoot the HVPS 1 Turn off the instrument 2 Remove the cover and disconnect the 2 connectors at the front ofthe NO Sensor Module 3 Remove the end cap from the sensor 4 Remove the HVPS PMT assembly from the cold block inside the sensor Un plug the PMT tube 5 Re connect the 7 pin connector to the Sensor end cap and power up the instrument 6 Use Figure 9 12 to check the voltages at each pin of the supply and the overall voltage ds Turn off the instrument power and re connect the PMT tube then re assemble the sensor If any faults are found in the test you must obtain a new HVPS as there are no user serviceable parts inside the supply 9 62 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F Figure 9 12 High Voltage Power Supply 9 63 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 9 3 9 Z S Valves Before troubleshooting this sub assembly check that the Z S valve option was ordered and that they are enabled in the software Section 6 3 shows how the Z S valves should be set up and how to use them with the AutoCal and Dynamic Cal features Check for the Z S valves 1 Check for the physical presence of the valves See Figure 2 5 for the Z S Valve location 2 Check front panel for option presence The front panel should disp
199. y visual inspection Clean repair or replace as needed Recorder 1 Adequate ink amp paper 2 Legible ink traces 3 Correct chart speed and range 4 Correct time Weekly visual inspection 1 Replenish ink and paper supply 2 Adjust time to agree with clock note on chart Analyzer operational settings 1 TEST measurements at nominal values 2 M200AU in SAMPLE mode Weekly visual inspection Adjust or repair as needed Analyzer operational check Zero and span within tolerance limits as described in Subsec 9 1 3 of Sec 2 0 9 Q A Handbook Level 1 zero span every 2 weeks Level 2 between Level 1 checks at frequency desired by user 1 Find source of error and repair 2 After corrective action re calibrate analyzer Precision check Assess precision as described in Sec 2 0 8 and Subsec 3 4 3 Ibid Every 2 weeks Subsec 3 4 3 Ibid Calc report precision Sec 2 0 8 Ibid 7 28 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F 7 6 10 ZERO and SPAN Checks A system of Level 1 and Level 2 zero span checks see Table 7 1 is recommended These checks must be conducted in accordance with the specific guidance given in Subsection 9 1 of Section 2 0 9 Q A Handbook Level 1 zero and span checks must be conducted every two weeks Level 2 checks should be conducted in between the Level 1 checks at a frequency desired
200. yzer Insufficient time allowed for purging of lines upstream of analyzer Leaking NO NO valve Insufficient time allowed for NO or NO cal gas source to become stable Moly converter temperature too low Miscalibration see Table 7 1 9 2 12 Analog Output Doesn t Agree with Display Concentration The analog output is proportional to the range Zero volts output corresponds to zero ppb and 5 volts corresponds to the maximum range setting in ppb If this is not observed do the following 1 V F board DAC s out of calibration Do DAC calibration and Factory Calibration 2 Analog outputs electrically loaded down causing voltage to sag Could be due to input impedance to chart recorder or data logger being too low or improper grounding The Recorder and DAS outputs do not have separate output drivers the problem could be the combined load of both could be too high 9 3 Subsystem Troubleshooting and Adjustments 9 3 1 Computer Display Keyboard 9 32 Teledyne API Model 200AU NOx Analyzer Instruction Manual 02293 Rev F The purpose of this section is to determine if the computer subsystem electronics hardware are working properly Assessment will be made at the board level 9 3 1 1 Front Panel Display The front panel display is a 2 line by 40 character display It has its own microprocessor to decode commands and display characters It contains a self test feature To test the display 1 Turn off the powe

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