SERIES 6103 Service Manual
Contents
1. ON Z 1MOd YOLVYANAD YSIEWVHO 100 lt ane _ N ON 1404 NOILOV38M ANOZO gt lt o ON 1304 ANJA 70 E gt 1 n0 gt lt 1404 o Ea SS dAa ON ZA isnvixa gt NI a1dWvS ON NOD Nnnow ON d 321410 NOIIVSN3dNO2 380553844 34nivN3dW3l Sv9 JIY 0837 9154 62 15N343138 jSv313M V AB an SNOISIA33M OCTOBER 2011 59 6103 SERVICE MANUAL REV 5 dt S4103 IRAGTER STANDARD He maa arin re eee GENERATOR E e 5 6103 SERVICE MANUAL REV 5 60 OCTOBER 2011 6103 SERVICE MANUAL 5 61 20112. CERTIFICATION CALIBRATION PROCEDURE 1 Connect with as short a piece of tube as possible one of the three OUTPUT MANIFOLD PORTS to a Primary Reference Photometer PRP or equivalent Leave the remaining two output ports and the VENT port to vent Connect zero air to PORT 1 and the REFERENCE PORT at 25 PSIG 3 From one of three main menus select the FLOW mode Enter 5 LPM for zero for MFC2 zero for ozone and press START being sure that at least one liter of gas vents This assumes that the external photometer will draw 2 LPM or less The 6103 photometer will draw 2 LPM as well If the external photometer draws more than 2LPM increase MFC1 flow accordingly 4 Press the MENU key once and the key until 03 CTRL is OFF This disables the photometer control loop and will decrease the response time of this procedure Press the MENU key 5 Once the 6103 reading and external photometer reading have stabilized record the difference between the 6103 and external photometer and enter this number in PPB into the offset field of the CALIBRATE PHOTO mode under the SYSTEM mode It will be necessary to stop the FLOW mode and exit to the SYSTEM mode If an offset already exists the new offset will need to be added or subtracted from the existing offset I E if the 6103 reading is lower than the external photometer then the offset will need to be added to the existing offset in the CALIBRATE PHO
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6. TP4 Response voltage for 2 this test point should measure approximately 005 to 015 VDC with a no flow command or a flow command of zero When commanding flow the measurement of this test point should equal TP2 as long as the MFC is flowing and controlling properly TP5 TP6 For A third MFC is currently not available in the 6103 TP7 VREF 5 00 VDC steady state 6103 SERVICE MANUAL REV 5 23 OCTOBER 2011 12 5 TP TP8 AGND TP9 5A TP10 5 TP11 12 TP12 12 TP13 AGND TP14 15 TP15 15 TP16 5 TP17 GND TP18 PGND TP19 24 VALUE Analog ground test point for negative black meter lead 5 VDC steady state 5 VDC steady state 12 VDC steady state 12 VDC steady state Analog ground test point for negative black meter lead 15 VDC steady state 15 VDC steady state 5 VDC steady state Ground test point for negative black meter lead when measuring TP16 Ground test point for negative black meter lead when measuring TP19 24 VDC steady state 0 Values in parenthesis are as seen on the PCB silkscreen 6103 SERVICE MANUAL REV 5 24 OCTOBER 2011 FUNCTION AND TEST POINTS CONTINUED PC414 FUNCTION PHOTOMETER DETECTOR PCB This PCB is mounted at the end of the photometer bench The information gathered by the photo detector is sent from this board via a ribbon cable in a digital serial bit pattern to th
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8. Environics Model 6103 OZONE TRANSFER STANDARD MULTI GAS CALIBRATOR Service Manual Rev 5 14 2011 Software rev 1 37 XX Environics Inc 69 Industrial Park Road East Tolland CT 06084 2805 USA Phone 860 872 1111 Fax 860 870 9333 www environics com OCTOBER 2011 6103 5 manual Manual Software Manual Revision Revision Release Enhancements Date 1 1 31 03 11 5 2002 Initial release 2 1 33 01 4 15 2003 Added this page to log changes changed software Revision cover page 3 1 35 02 9 12 2003 Modified ozone calibration procedure to account for automatic pump control Also ozone calibration procedure is now done in the calibrate ozone mode Versus the flow mode 4 1 37 01 1 9 09 Changed range for samp ref intensities to 500K 850K 5 10 14 11 Updated optional calibration information Updated Ozone calibration procedure 6103 SERVICE MANUAL REV 5 1 2011 SERVICE MANUAL TABLE OF CONTENTS FEATURE INTERNAL LAYOUT PERIODIC MAINTENANCE Cleaning the fan filter Cleaning the photometer tube Leak test Adjusting photometer REF SAMP intensities SYSTEM MODE SYSTEM CALIBRATION MFC flow calibration procedure Flow verify MFC individually Photomete
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10. Check fuses in power entry module on rear panel and replace if necessary System display does not come up and power switch is iluminated FLOW PROBLEMS Zero or low flow from one or more mfcs INDICATIONS Incorrect blend including ozone levels no output gas measured only zero gas when commanding a mixture high gas concentrations Check all steady state test points on the PC412 If absence of TP14 TP15 TP16 or TP19 check power supply voltages with power cable disconnected from PC412 See power cable wiring diagram on page 41 of this manual If any of the power supply voltages are absent replace power supply If all power supply voltages are present identify the PCB or component drawing down the power supply and replace If absence of any other steady state test points replace 412 SOLUTION Check and adjust input pressures if necessary Nominal pressure is 25 PSIG Tube size for MFC1 should be O D minimum 1 8 minimum for 2 Remove all output connections to the system and try again This will insure that the problem is not back pressure related 6103 SERVICE MANUAL REV 5 OCTOBER 2011 FLOW PROBLEMS Zero or low flow from one or more mfcs NOTE For all flow related problems always check the steady state test point values on the PC412 first If there is a problem with TP14 15 16 or 19 follow the instructions in the POWER PROBLEM section
11. 0000 2 3 0000 26 120 3 0 0000 0 0000 6103 SERVICE MANUAL REV 5 16 2011 ADC CALIBRATIONS CONTINUED OZONE GENERATOR PRESSURE The values fed back by this ADC are used to formulate the information for the leak test and ozone pressure correction Ozone pressure correction is only active when the photometer control loop is off When Ozone pressure correction is enabled the ozone lamp intensity is adjusted as the pressure in the ozone generator rises or falls A certified pressure standard will be necessary for this calibration 1 Ensure that the VENT port is open to atmosphere 2 From one of three main menus on the 6103 front panel select the SYSTEM mode 3 Select CALIBRATE ADC 4 Enter 11 NOTE This is the 6103 ADC cal table for the pressure transducer circuit on the PC410 The live reading ADC 11 RESP in this table is a voltage and the scale of the circuit is 0 to 5 for 0 to 30 PSIA The live reading should normally be between 2 3 and 2 5 VDC 13 8 to 15 PSIA and will be dependent on elevation and or weather conditions 5 the first and second column first row values to 0 6 Place the live reading of ADC 6 in the first column second row location 7 Place the value as measured by a certified pressure standard into the second column second row location as a PSIA value Note This has identified to the software that for the 6103 live reading from step 6 the actual pressure is the
12. SERVICE MANUAL REV 5 26 OCTOBER 2011 415 5 TP VALUE 15 24 24 VDC steady state 16 This test point represents the photometer lamp waveform generated by an oscillator circuit on the PC415 prior to entering the step up transformer T1 The waveform should look like the one represented in the diagram 415 166 17 on page 40 TP17 Reference TP16 18 19 This test point represents the lamp waveform exiting step up transformer The waveform should look like the diagram labeled 415 TP19 on page 40 Values in parenthesis are as seen on the PCB silkscreen PC416 FUNCTION SOLENOID VALVE DRIVER AND STATUS I O BOARD This PCB is used to activate the solenoid valves used to isolate the gases on the input gas ports These valves are turned on with 24 VDC and then run at 3096 duty cycle or 1 3 power This allows more efficient use of the internal 24 VDC power supply This board also controls the input and output status lines To use the Status Input feature the 2 control pins for the desired status input must be connected together The status input signal must be present for at least 500 milliseconds to ensure that the connection is properly detected by the software Caution The status inputs respond only to a connection between adjacent pins of the desired input Do not apply any voltage to the status input pins as this will result in damage to the in
13. above SOLUTION While commanding the MFC in the flow mode see verifying individual flow controllers in the calibration section of this manual measure the command voltage to the MFC on the PC412 If the voltage is present and approximately correct for the flow rate being commanded measure corresponding MFC response test point on the PC412 If the response voltage is low or 0 there may either be a problem with the MFC cable 15 VDC steady state power supply or the MFC Try swapping the MFC cable and check the PC412 test points for 15 VDC If these things fail to fix the problem contact Environics technical services lf the command voltage is not present check the calibration data for the MFC in the system mode to ensure that the values have not changed from the last calibration Environics sends a hardcopy of all data for reference These values may be slightly different if a follow up calibration has been done by the customer Check TP7 on 412 This is the reference voltage 5 used by the MFC ADC and DAC Try running the in the calibration mode to see if the problem exists there as well This will insure that the problem is not related to software processing if it does not run in this mode either 6103 SERVICE MANUAL REV 5 30 OCTOBER 2011 FLOW PROBLEMS Blend or flow is unstable SOLUTION Measure the MFC response voltage on the PC412 If
14. commands are sent from the PC412 The command voltages typically range from 0 5VDC with 12 bit resolution from the PC412 DAC 6103 SERVICE MANUAL REV 5 20 OCTOBER 2011 410 CONTINUED PC410 TEST POINTS TP 2 TP4 5 7 8 VALUE Approximately 3 8 to 4 1 VDC when ozone generator is controlling properly 5 VDC when lamp is on full and 1 VDC when lamp is not commanded or ozone command is 0 PPM Ozone response voltage should always equal the command voltage TP4 except for an ozone command of zero This voltage will normally measure between 1 and 5 VDC The voltage of this test point is totally dependent on the command of ozone and flow rate At zero command or when the ozone generator has no command this voltage should be 80 100mv Should measure between 1 VDC and 5 VDC for ozone generator flow rates from 0 LPM 1 VDC to 1 LPM 5 VDC These voltages are approximations uncalibrated as they are fed through a calibration table for more accurate displayed values The flow through the ozone generator is controlled by a bypass reference P amp ID on the last page of this manual This is the command voltage for the ozone generator and should measure between 0 and 5 VDC This voltage is totally dependent on the ozone concentration and flow rate Other factors controlling this value are the ozone generator calibration table and ozone generator pressure correction This test p
15. measured flow value into the TRUE column opposite the SET flow reading in the calibration table Once the true flow is entered use the arrow key to move up to the next flow value and press update Perform this process for all 11 flow points waiting approximately 2 minutes between each reading to allow the MFC to stabilize at the desired flow 11 After all 11 data points have been entered into the calibration table press the EXIT key and then the SAVE key 12 Verify the individual 5 in the FLOW mode as outlined below The accuracy should be better than 196 of set flow value 6103 SERVICE MANUAL REV 5 8 OCTOBER 2011 FLOWS INDIVIDUALLY WITH FLOW STANDARD To flows from individually the PUMP must be off This is done by pressing the MENU key while the system is flowing in the flow mode Press the PUMP key until OFF appears Pressing the MENU key again will automatically change the setting to OFF This will isolate any leaking that may occur back out through the photometer bench by deactivating valve V2 and the pump refer to P amp ID on page 58 Two output ports and the vent port must be capped Supply the flow standard from the remaining output manifold port When you are finished be sure to press the PUMP key until ON appears SPAN ADJUSTEMENT ZERO ADIUSTEMENT MFC ILLUSTRATION DRAWING 6103 SERVICE MANUAL REV 5 9 OCTOBER 2011 CALIBRATION SYSTEM
16. the remaining light build up use compressed air 5 Realign fan filter and reattach retainer E FAN FILTER ASSEMBL CLEANING THE PHOTOMETER TUBE Periodically remove the photometer tube to clean out any debris that has collected on the ID of the tube It is best to used compressed air to clean out the tube The smooth ID of the tube will allow the debris to be removed easily To remove the photometer tube loosen the knurled knob on the lamp end of the photometer bench by rotating counter clockwise After reinstalling the tube run the leak test er CPU S CT A REMOVING PHOTOMETER TUBE KNURLED NUT 6103 SERVICE MANUAL REV 5 4 OCTOBER 2011 ROUTINE MAINTENANCE CONTINUED LEAK TEST The 6103 has an automated Leak Test function to determine if the system has any internal leaks To run the Leak Test 1 Be sure there is a source of gas connected to Port 1 at 25 PSIG 2 Select the LEAK function from the Main Menu and then press START The software will acquire Atmospheric Pressure and then prompt for the outputs to be capped 3 Cap the Output Manifold Vent and Exhaust ports Use the caps supplied with the system 4 Press OK The Leak Test will fill the volume of the system plumbing with gas from Port 1 to 5 PSIA above atmospheric pressure and use pressure decay to calculate the leak rate Any leak in excess of the maximum leak specification for the system 3 SCCM will be displayed A
17. value measured by a certified standard Example Pressure measured in step 7 is 14 429 Live reading from ADC 6 from step 6 is 2 4257 DATA IN ADC 6 CAL TABLE ADC RESP z 2 4257 1 0 0000 0 0000 2 2 4257 14 429 3 0 0000 0 0000 6103 SERVICE MANUAL 5 17 2011 ADC CALIBRATIONS CONTINUED OZONE BLOCK TEMPERATURE Use calibrated temperature meter with surface sensing thermocouple This ADC is used for display and troubleshooting purposes only The value fed back from this ADC does not impact the photometer reading 1 From one of three main menus on the 6103 front panel select the SYSTEM mode 2 Select CALIBRATE ADC 3 Enter 13 NOTE This is the 6103 ADC cal table for the temperature sensor circuit on the PC410 The live reading ADC RESP in this table is a voltage The voltage times 10 is the temperature in degrees C The normal live reading value should be between approximately 4 8 and 5 1 once the system has warmed up 4 Place the surface sensing thermocouple on the top of the ozone block Allow meter to stabilize and record the value in degrees C 5 Place 0 0 in the first and second column first row locations of the cal table 6 Place the live reading of ADC 13 in the first column second row location 7 Place the value measured in step 4 into the second column second row location Note This has identified to the software that for the 6103 live reading from step 6 the actu
18. 03 SERVICE MANUAL REV 5 7 2011 7 Select the SYSTEM mode from of three main menus From the SYSTEM mode select CALIBRATE MFC and enter the MFC number to be calibrated The port number should be set to 1 for and 2 for and if applicable Use the ENTER key to accept the port number MFC FLOW CALIBRATION PROCEDURE CONTINUED 8 Using the down arrow key scroll down to the 100 point point 11 of the MFC and press START on the keypad 9 Always let the unit flow for approximately 2 minutes at each point prior to taking readings To make sure that the is stable and is not drifting take enough readings at 100 to establish stability If the is not generating 10096 as read by the flow standard being used a span adjustment can be made Note however that span adjustments to the MFC Will void the factory calibration and void the warranty repair of any inaccuracies that result in the blend The span full scale of the MFC has been factory adjusted to generate 100 to 103 of set point The reference temperature used on the Environics flow standard is 77 F 25 C The MFC span potentiometer is accessed through the top of two holes on the back of the MFC case reference the MFC illustration drawing on page 9 10 Readings are taken at 10 intervals of full scale 100 of flow down to 10 and a 5 reading is also taken Once a valid reading has been taken simply enter that respective
19. CROCOMPUTER BOARD The 401 is an off the shelf microcomputer board It contains the system EPROM and battery backed up RAM for the storage of all system configuration calibration and user data Also this PCB controls the switching of solenoid valves V1 and V2 reference P amp ID on the last page of this manual 401 TEST POINTS As this PCB was not designed or is not manufactured by Environics and contains digital circuitry there are no test points available PC406 FUNCTION KEYPAD INTERFACE AND DISPLAY PCB The PC406 decodes the information entered on the keypad and displays information sent by the processor board on the front panel 4 lines by 20 character LCD display Also this PCB contains the beeper circuit for an audible confirmation of keypad data entry PC406 TEST POINTS TP VALUE 5 VDC Steady state TP2 GND Meter or oscilloscope reference TP3 25 to 1 8 VDC as display contrast is adjusted in PREFS mode 4 See diagram PC406 on page 39 PC410 FUNCTION OZONE GENERATOR PCB The 10 is completely analog The PC410 interfaces with the PC412 analog board Analog information is fed back from the ozone generator via a ribbon cable to the PC412 The PC412 using 12 bit ADC converts the information to a digital bit pattern for processing by the PC401 microcomputer board The information includes ozone generator flow pressure temperature lamp voltage and ozone generator response voltage Also ozone
20. DJUSTING THE PHOTOMETER SAMP REF INTENSITIES For the best photometer resolution the sample and reference intensities should be set for 500 000 to 850 000 The intensities can be seen in the PHOTO MODE in the DETAIL screen selection In the PHOTO mode with the photometer pump off these intensities should be approximately the same Each number updates every 4 seconds However the update of each number is staggered by 4 seconds As the photometer lamp ages it will be necessary to increase these intensity values To increase or decrease these values within the range outlined above perform the following 1 From one of three main menus enter the SYSTEM mode and scroll down to CALIBRATE PHOTO Use the ENTER key to select the mode 2 Scroll down to the INTEG TIME field 3 To increase the intensities increase the INTEG TIME value in increments of 1ms to 5 ms Each time you change the INTEG TIME and press the ACCEPT key the system will run a short internal calibration sequence and exit back to the READY screen Be careful not to change the OFFSET and GAIN values in this mode as this will affect the photometer accuracy The OFFSET and GAIN values are adjusted in the photometer calibration procedure in the next section of this manual Reenter the PHOTO mode to see the effect of the changes 6103 SERVICE MANUAL REV 5 5 2011 ADJUSTING THE SAMP REF INTENSITIES CONTINUED 4 To decrease the lamp intensit
21. EV 5 44 OCTOBER 2011 1 U c CN C33 C18 NOT LOLLI N e 2 ENVIRONICS e H p R49 PC410 REV C C22 C24 623 7 LOLLI a N 7 R27 2 17 111014 R28 R29 410 COMPONENT SIDE 6103 SERVICE MANUAL REV 5 45 OCTOBER 2011 Ll tius Cen p za 7 112 Photometer S a sadi s o o 99 Norton zur 200 022 en zn gd 5 wo 25 1 LH gn 9n 9 122 612 ir 22028 21994 vZ N9d GNOS 61 61 21 Zi G VG 9 SOINOJIAN3 412 2011 46 6103 SERVICE MANUAL 5 2 on gt 2 25 O 414 6103 SERVICE MANUAL REV 5 47 2011 gin LM10C in gc 192 1 693 888 95 1 488 1 23 43 2141 81 24 SOINOMIAN3 tey 0 111014 Gt QNOV 61 VLOL SLb a L zio 74HCUQ4 PC415 OCTOBER 2011 48 6103 SERVICE MANUAL REV 5 SvZOVVL CE 615 ducc 3 XO CN CN CN C CN CN oooooo
22. TO screen The zero offset should never be more than 10 0 PPB If the offset is larger it may indicate a setup or functional problem with the system 6 Repeat step 3 to verify that the 6103 and external photometer both agree with just zero air 7 While flowing enter an ozone level that is at least 8096 of the URL Upper Range Limit of the photometer range to be calibrated typically 5 PPM or 1 PPM ranges 8 Allow the ozone readings of the 6103 and external photometer to stabilize Increase the commanded ozone value as necessary to get the actual ozone above at least 80 URL 6103 SERVICE MANUAL REV 5 10 OCTOBER 2011 CERTIFICATION CALIBRATION PROCEDURE CONTINUED 9 Calculate the 6103 photometer gain using the following formula New Gain PRP reading 6103 reading X Current gain Current GAIN is found in the CALIBRATE PHOTO mode in the SYSTEM mode 10 Enter the new GAIN into the CALIBRATE PHOTO screen of the 6103 and save 11 Exit back to the FLOW mode and verify the existing ozone point and two other points equally spread out in the range of calibration The 6103 and External photometer readings should agree to within 3 PPB or 296 whichever is greater 6103 SERVICE MANUAL REV 5 11 2011 CALIBRATION SYSTEM OZONE CALIBRATION This procedure will allow the system to respond faster to set point when producing ozone with OSCTRL ON Also the oz
23. accurate display purposes and pressure correction 10 VDC steady state 0 Values in parenthesis are as seen on the PCB silkscreen 6103 SERVICE MANUAL REV 5 22 2011 FUNCTION AND TEST POINTS CONTINUED PC412 FUNCTION ANALOG BOARD This PCB is an interface between all system analog control readback components and the microcomputer board PC401 The analog components include all ozone generator and photometer analog values I E pressure temperature etc and mass flow controllers MFCs This PCB uses 12 bit A D and D A converters for high resolution control and readback of the analog devices PC412 TEST POINTS TP VALUE Command voltage for this test point should measure approximately 5 VDC to 5 0 VDC for 1 commands between 10 and 100 full scale flow This range is approximated due to the MFC calibration table having an affect on the command voltage TP2 Response voltage for MFC1 this test point should measure approximately 005 to 015 VDC with a no flow command or a flow command of zero When commanding flow the measurement of this test point should equal as long as the MFC is flowing and controlling properly TP3 Command voltage for 2 this test point should measure approximately 5 VDC to 5 0 VDC MFC1 commands between 10 and 100 full scale flow This range is approximated due to the MFC calibration table having an affect on the command voltage
24. al temperature is the value measured in step 4 8 Make sure that all other rows have zero data for both columns Example Temperature measured in step 4 is 50 15 degrees C Live reading from ADC 13 is 4 982 TYPICAL DATA IN ADC 13 CAL TABLE ADC RESP 4 9820 1 0 0000 0 0000 2 4 9820 50 150 3 0 0000 0 0000 6103 SERVICE MANUAL REV 5 18 2011 CALIBRATION SYSTEM PASSWORD system mode can be password protected as this mode contains all the data that impacts the accuracy of the system The system is shipped with the password set to NONE A four character numeric password is set within the SYSTEM mode Upon any attempts to reenter the system mode after setting a password the user will be prompted to enter the password to gain entry Be sure to record this password and keep it in a safe and secure location From one of three main menus select the SYSTEM mode Toggle ARROW down to CHANGE PASSWORD and press ENTER Enter the 4 digit numeric password and press DONE go EXIT back out the SYSTEM mode and press the SYSTEM key prompt should appear for a password entry Enter the previously selected 4 digit numeric password to the process 6 Once the password is entered entry into the SYSTEM mode should be automatic 6103 SERVICE MANUAL REV 5 19 OCTOBER 2011 FUNCTION AND TEST POINTS PC401 FUNCTION MI
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26. ature meter with exposed junction thermocouple will be best 1 Remove the photometer tube from the 6103 under test 2 From one of three main menus on the 6103 front panel select the SYSTEM mode 3 Select CALIBRATE ADC 4 Enter 7 NOTE This is the 6103 ADC cal table for the temperature sensor circuit on the PC415 The live reading ADC RESP in this table is a voltage The voltage times 100 is the temperature in degrees K 273 15 degrees K is 0 degrees C The normal live reading value should be between approximately 2 96 22 85 C and 3 0 26 85 C 5 first column first row value to 2 7315 and the second column first row value to 0 0000 6 Insert the exposed junction thermocouple into the fitting containing the temperature sensor PC414 end of bench Get the thermocouple as close to the sensor as possible without touching the inner wall of the fitting or any other surface 7 Place the live reading of ADC 7 in the first column second row location 8 Place the value measured in step 6 into the second column second row location Note This has identified to the software that for the 6103 live reading from step 7 the actual temperature is the value measured in step 6 9 Zero all other fields in the cal table such that rows 1and 2 are the only rows with data Example Temperature measured in step 6 is 26 12 degrees C Live reading from ADC 7 is 3 0000 DATA IN ADC 7 CAL TABLE ADC RESP 3 0000 1 2 7315 0
27. cal noise REFERENCE port pressure 15 too high or to low Ensure that the gas pressure on the REFERENCE port is between 20 and 30 PSIG e Insufficient gas for 6103 photometer Make sure that 2 LPM is considered for the photometer when delivering gas to external analyzers MISCELLANEOUS PROBLEMS SOLUTION Memory loss Battery on 401 is low Battery should be 3 VDC and no less than 2 VDC 6103 SERVICE MANUAL REV 5 38 OCTOBER 2011 MISCELLANEOUS 5 Status input and output problems SOLUTION Ensure that all test points are correct according to the PCB function and test point section of this manual for the PC416 Ensure that all inputs and outputs are setup as outlined in the user s manual and PCB function and test point section of this manual for the 416 Replace 416 1055 Analog output is not correct Battery on 401 is low Battery should be 3 VDC and no less than 2 VDC Check all PC415 test points Replace PC415 Troubleshooting notes l Be sure to use a grounding strap when handling electronics 2 When troubleshooting never unplug either valve V1 or V2 with the power on These are general guidelines for Troubleshooting Contact Environics technical services for additional help on system problems Newer systems as of 11 02 use a chassis with hinged side panels This allows the side panels to be dropped fo
28. e PC401 or valve lf in the flow or concentration mode and ozone is being generated by the 6103 most of the items in the section above apply except for V1 and the SAMPLE IN port e Ozone generator is not functioning Reference the section for ozone problems e PHOSRC is EXT instead of INT Press the MENU key and change PHOSRC to INT PHOTOMETER PROBLEMS SOLUTION During GPT 2 values keep e O8CTRL is set to ON during GPT rising or over titration occurs Set 03 control to OFF or LOCK during GPT See user s manual for more information 6103 SERVICE MANUAL REV 5 27 2011 PHOTOMETER PROBLEMS SOLUTION Noisy photmeter readings e Pump intake or outlet valves are not sealing properly This will also cause photometer readings to be low as the reference gas will mix with sample gas Place a small amount of restriction on the EXHAUST port use a 6 piece of 1 8 tubing With the photometer loop off if in the FLOW or CONC mode the ozone level should drop off significantly and become very noisy This is an indication that the pump intake or outlet valves have become partially blocked Photometer tube is dirty Clean photometer tube as outlined in the Routine Maintenance section of this manual External electrical noise is a factor Make sure that the system cover is on and a screws are secure This will create a better chassis ground and the system will not be as susceptible to electri
29. e PC415 for processing PC414 TEST POINTS This PCB has no test points PC415 FUNCTION PHOTOMETER PCB This PCB interfaces between the photometer analog devices and the PC412 analog board Analog information is fed back from the photometer via a ribbon cable to the PC412 The PC412 using 12 bit ADC converts the information to a digital bit pattern for processing by the PC401 microcomputer board The information includes photometer flow gas pressure gas temperature and lamp block temperature This PCB also processes information sent back from the PC414 photo detector PCB The analog output channels are also controlled by this PCB PC415 TEST POINTS TP VALUE 1 5 5 VDC steady state TP2 GND Ground test point for negative black meter lead when measuring 1 TP3 Should measure 1 VDC when the photometer pump is off and approximately 1 7 VDC when the pump is on The flow through the photometer flow meter is controlled by a bypass reference P amp ID on the last page of this manual Not all photometer flow passes through the flow meter however the total photometer flow 2 LPM is calculated based on the ratio setup by the bypass 6103 SERVICE MANUAL REV 5 25 OCTOBER 2011 4 10 5 7 5 8 9 15 TP10 AGND 11 15 12 TPI3 VREF TP14 PGND PC415 TEST POINTS CONTINUED VALUE 10 VDC steady state This test point represents the photometer gas
30. e internal photometer pump can be turned off using the menu key The top line of the calibration screen will indicate 7 Allow the photometer reading to stabilize Time will be dependent on how frequently the system runs with ozone and the last time the system ran with ozone conditioning and burn in are key 8 For this one point the actual ozone concentration level read by photometer should be approximately 10 96 higher than the command or 1 1 times the command Example 50 command x 1 1 level 55 ppm 1 0 command 1 1 3 level 1 1 ppm This can be accomplished by removing the ozone generator cover and adjusting R35 gain potentiometer on PC410 6103 SERVICE MANUAL REV 5 12 OCTOBER 2011 OZONE CALIBRATION CONTINUED 9 After making the gain adjustment be sure that the ozone generator zero offset has not changed significantly Stop the ozone generator and measure the voltage at TP2 on the PC410 This voltage should be between 08 and 1 VDC If it is not adjust potentiometer R46 until it is within this range Reinstall the ozone generator cover 10 Command a series of points up to 11 starting with the concentration from step 8 and working down to the minimum concentration The factory calibration points are listed below During the calibration process record the average 03 pressure value This pressure value can be found by pressing the view key Value listed as P is the ozone generator pressure P
31. ection Try verifying the ozone problem with an external source to isolate the problem either to the ozone generator or photometer SOLUTION Check TP4 on PC410 This is the command test point for the ozone generator The value of this test point will be dependent on several factors However the voltage should normally measure above 1 VDC lf the command voltage is present and all steady state voltages are good the problem may either be with the ozone lamp or the 410 circuitry for driving the lamp Replace the lamp or 410 lf the command voltage is not present try a higher ozone command to be sure that the command is not to low This voltage is generated by the 412 using the same DAC as the Generally if the MFCs are functioning it will not be related to the DAC on the PC412 However measure the common reference voltage at TP7 on 412 This voltage should be 5 VDC Also make sure that all ozone calibration data SYSTEM MODE is valid and consistent with either the data generated by the last calibration or the hardcopies supplied by Environics for the factory calibration 6103 SERVICE MANUAL REV 5 32 2011 6103 SERVICE MANUAL REV 5 33 2011 OZONE PROBLEMS Ozone is drifting 6103 SERVICE MANUAL REV 5 34 SOLUTION System has not warmed up long enough with ozone Especially when a system is new the generator may drift up
32. etector PCB PC414 Photometer bench assembly Photometer lamp and heated lamp block assembly Photometer bench output fitting with gas temperature sensor Photometer flow meter Photometer PCB PC415 115 watt switching power supply Reaction chamber output manifold and mixing chamber assembly A D and D A analog interface PCB PC412 N A Component gas flow controller MFC2 Dilution balance gas flow controller MFC1 Microcomputer board PC401 Isolation valve V1 This valve selects either an external source of ozone or the internal source produced by the internal ozone generator Ozone generator including ozone analog PCB PC410 Photometer cycling valve V2 This valve cycles back and forth between a reference gas and ozone containing sample Keypad ribbon cable Photometer pump assembly longevity up to 10 000 hours Display and keypad interface PCB PC406 Front panel 6103 SERVICE MANUAL REV 5 2 OCTOBER 2011 Q lt CALIBRATOR INTERNAL LAYOUT HINGED PANELS DOWN 6103 SERVICE MANUAL REV 5 3 OCTOBER 2011 ROUTINE MAINTENANCE CLEANING THE FAN FILTER This procedure should be performed if the fan speed is noticeably slower or there is a change in the color of the filter 1 Locate the fan on the rear panel and remove the fan filter retainer exposing the fan filter 2 Remove the fan filter media 3 To remove heavy build up shake the filter vigorously 4 To remove
33. for this calibration 1 Remove the photometer tube from the 6103 under test reference page 4 2 From one of three main menus on the 6103 front panel select the SYSTEM mode Select CALIBRATE ADC Enter 6 NOTE This is the 6103 ADC cal table for the pressure transducer circuit on the PC415 The live reading ADC RESP in this table is a voltage and the scale of the circuit 15 0 to 5 VDC for 0 to 30 PSIA The live reading should normally be between 2 3 and 2 5 VDC 13 8 to 15 PSIA and will be dependent on elevation and or weather conditions 5 Setthe first and second column first row values to 0 6 Place the live reading of ADC 6 in the first column second row location 7 Place the value as measured by a certified pressure standard into the second column second row location as a PSIA value Note This has identified to the software that for the 6103 live reading from step 6 the actual pressure is the value measured by a certified standard Example Pressure measured in step 7 is 14 429 Live reading from ADC 6 from step 6 is 2 4257 DATA IN ADC 6 CAL TABLE ADC RESP z 2 4257 1 0 0000 0 0000 2 2 4257 14 429 3 0 0000 0 0000 6103 SERVICE MANUAL REV 5 15 2011 ADC CALIBRATIONS CONTINUED PHOTOMETER GAS TEMPERATURE The values fed back by this ADC are used to formulate the displayed photometer ozone level A certified temperature standard will be necessary for this calibration A temper
34. hotometer reading 1 From one of three main menus on the 6103 front panel select the SYSTEM mode 2 Select CALIBRATE ADC 3 Enter 04 NOTE This is the 6103 ADC cal table for the temperature sensor circuit on the PC415 The live reading ADC 04 RESP in this table is a voltage The voltage times a factor of 10 is the temperature in degrees C The normal live reading value should be between approximately 4 8 and 5 1 4 Place the surface sensing probe onto the photometer block lamp end Allow meter to stabilize and record the value in degrees C 5 Place 0 0 in the first and second column first row fields of the cal table 6 Place the live reading of ADC 4 in the first column second row field 7 Place the value measured in step 4 into the second column second row field Note This has identified to the software that for the 6103 live reading from step 6 the actual temperature is the value measured in step 4 8 sure all other rows have zero data for both columns Example Temperature measured in step 4 is 50 15 degrees C Live reading from ADC 4 is 4 982 DATA IN ADC 4 CAL TABLE ADC RESP 4 9820 1 0 0000 0 0000 2 4 9820 50 150 3 0 0000 0 000 6103 SERVICE MANUAL REV 5 14 2011 ADC CALIBRATIONS CONTINUED PHOTOMETER PRESSURE TRANSDUCER The values fed back by this ADC are used to formulate the displayed photometer ozone level A certified pressure standard will be necessary
35. lowed to the MFCs This will clear out any trapped gases that would interfere with the readings in the following step Let the system run for approximately 30 seconds and press STOP If your system has an optional third MFC this must be cleared out as well by pressing EDIT You will then change the flow for GAS2 to the Max Flow for the third MFC i e 10 CC and press update You will then continue as above 5 Check the zero MFC response voltage with zero flow of each MFC by hooking up a DVM to the respective MFC test points on PC412 reference assembly drawing section and internal layout illustration for PCB and test point location Connect the ground meter lead to the test point labeled AGND analog ground Connect the positive meter lead to the response test point of each MFC1 is TP2 MFC2 isTP4 and if applicable is TP6 The zero specification is from 005VDC to 015VDC If the zero is out of specification it must be adjusted using the MFC zero potentiometer This potentiometer can be accessed through the bottom of two holes in the back of the case Reference the illustration drawing on 9 6 Connect air or nitrogen to Port 1 for MFC1 and Port 2 for 2 and if applicable Adjust the input pressure to approximately 25 PSIG Connect the OUTPUT PORT of the 6103 to a suitable flow standard Environics calibration is NIST traceable using a primary flow standard accurate to 296 of reading 61
36. meter mode and trying to read external source of ozone make sure that the vented source of ozone is connected to the SAMPLE IN port and zero air is connected to REFERENCE port at 25 PSIG pump is running all photometer diagnostic information is correct according to PHOTO section of user s manual photometer valve V2 is switching at a rate of once every 4 seconds all test points on PC415 are consistent with values indicated in PCB FUNCTION AND TEST POINT section of this manual Photometer intensities are at or close to zero Lamp is defective PC414 or PC415 lamp drive circuit is bad Replace lamp PC414 or PC415 Pump is not running Replace pump assembly Photometer valve V2 is not switching With the system power off disconnect solenoid valve connector between PC401 and V2 Measure the DC resistance of V2 The resistance should be approximately 80 ohms If resistance is good 401 high current driver circuit may be bad or solenoid valve plunger is stuck Replace PC401 or valve 6103 SERVICE MANUAL REV 5 36 OCTOBER 2011 PHOTOMETER PROBLEMS CONT SOLUTION Not reading ozone In photometer mode continued V1 is not activating With the system power off disconnect solenoid valve connector between PC401 and V1 Measure the DC resistance of V1 The resistance should be approximately 80 ohms If resistance is good PC401 high current driver circuit may be bad or solenoid valve plunger is stuck Replac
37. oint represents the lamp waveform generated by an oscillator circuit on the PC410 prior to entering the step up transformer T1 The waveform should look like the one represented in the diagram PC410 TP5 amp TP7 on page 39 This test point represents the lamp waveform exiting step up transformer T1 The waveform should look like the diagram labeled PCA10 TP6 amp TPS on page 39 Reference TP5 Reference TP6 6103 SERVICE MANUAL REV 5 21 2011 410 5 VREF 10 15V 11 15 12 13 424 14 AGND 15 TP16 PGND 17 TP18 10V VALUE 5 00 VDC steady state 15 VDC steady state 15 steady state NA 24 VDC steady state Analog ground test point for negative black meter lead This test point represents the controlled ozone block temperature After an approximate 30 minute warm up period this test point will normally measure between 4 8 and 5 1 VDC for 48 and 51 degrees C respectively This is the power 24VDC ground test point for the negative black meter lead when measuring the 24 VDC test point TP13 This test point represents the ozone generator pressure This value will read approximately 2 45 VDC for 14 7 PSIA The ozone generator pressure transducer circuit generates 0 5 VDC for 0 30 PSIA Note this value is an uncalibrated value It is fed through a calibration table ADC 11 for a more
38. one generator will be more accurate with O3CTRL OFF Factory defaults to 3 calibration points The ozone generator can be calibrated for up to 11 points 1 Connect zero air at 25 PSIG to Port 1 and the Reference Port of the instrument The 6103 will use the internal photometer which must be within its certification period to calibrate the ozone generator 2 Vent all remaining output ports and the vent port 3 Connect a chart recorder or some other form of data acquisition to the pins labeled 1 and 1 on the rear panel analog output connector this is for charting stability 4 From one of three main menus select SYSTEM and CALIBRATE OZONE 5 If calibrating the ozone generator for the flow and ozone concentration levels identified when the system was purchased press the down arrow key four times If calibrating for some other flow or concentration level contact Environics technical services for information on the TOTAL FLOW OZONE FLOW and MAX 03 PPM parameters To identify the original calibration information refer to the calibration printouts supplied with the system or contact Environics technical services Be sure to have the system serial number when calling The serial number is identified on the rear panel of the system 6 Key down to the highest ozone point in the table and press start The photometer pump will turn on automatically If for some reason and external photometer is being used for this calibration th
39. pressure This value will read approximately 2 45 VDC for 14 7 PSIA The photometer pressure transducer circuit generates 0 5 VDC for 0 30 PSIA Note This value is an uncalibrated value It is fed through a calibration table ADC 06 for a more accurate display purposes and pressure compensation This test point represents the photometer gas temperature This value will read approximately 2 45 VDC for 14 7 PSIA The photometer pressure transducer circuit generates 0 5 VDC for 0 30 PSIA Note This value is an uncalibrated value It is fed through a calibration table ADC 11 for a more accurate display purposes and pressure compensation 5 VDC steady state The voltage represented by this test point is used in the closed loop control of the photometer block heater The voltage at this test point should measure between 4 VDC and 5 VDC for block temperatures between 25 and 50 degrees C respectively 15 VDC steady state Analog ground test point for negative black meter lead 15 VDC steady state This test point represents the controlled photometer block temperature After an approximate 30 minute warm up period this test point will normally measure between 4 9 and 5 1 VDC for 49 and 51 degrees C respectively 5 00 VDC steady state This is the power 24VDC ground test point for the negative black meter lead when measuring the 24 VDC test point 15 0 Values in parenthesis are as seen the silkscreen 6103
40. r calibration Ozone generator calibration ADC calibrations 04 photometer block temperature ADC 06 photometer gas pressure ADC 07 photometer gas temperature 11 ozone generator pressure ADC 13 ozone block temperature Password protection PCB FUNCTION AND TEST POINTS TROUBLESHOOTING TEST POINT WAVEFORMS PCB ASSEMBLY DRAWINGS PCB SCHEMATICS P amp ID PIPING AND INSTRUMENTATION DIAGRAM P amp ID WITH OPTIONAL MFC3 6103 SERVICE MANUAL REV 5 ii PAGE 1 3 10 11 12 13 14 18 14 15 16 17 18 19 20 28 29 38 39 40 42 48 49 57 59 OCTOBER 2011 LIST OF ILLUSTRATIONS ILLUSTRATION TITLE PAGE Internal layout Standard 6103 With 2 MFCs 1 Internal layout hinged panels down 3 Fan filter assembly 4 Removing photometer tube 4 MFC illustration drawing 9 Power cable 41 Piping and instrument diagram 58 Piping and instrument diagram w optional MFC3 59 6103 SERVICE MANUAL REV 5 iii OCTOBER 2011 a EE Nm io t e o 4 53 Internal layout Standard 6103 With 2 MFCs 6103 SERVICE MANUAL REV 5 OCTOBER 2011 LAYOUT STANDARD 6103 WITH 2 5 So Quo cq et 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Fan assembly Status l O solenoid valve driver PCB PC416 Solenoid valve manifold assembly Photometer Photo d
41. r troubleshooting purposes The cable lengths will allow the system to be powered on while the panels are dropped However always power down before dropping the panels 6103 SERVICE MANUAL REV 5 39 OCTOBER 2011 TEST POINT WAVEFORMS PC406 2 V div 10 TP5 amp TP7 50 V div 6103 SERVICE MANUAL REV 5 40 OCTOBER 2011 TEST POINT WAVEFORMS 415 16 amp 17 10 V div PC415 19 500 mv div SEPE PC416 TP3 2 V div 6103 SERVICE MANUAL REV 5 41 OCTOBER 2011 NOTE The information Vp p Freq and Duty cy listed on the above graphs was generated by an oscilloscope The values will vary slightly from system to system and scope to scope The object is to verify that the signal generated by these test points is similar to that seen in the graph PIN NUMBER VOLTAGE 1 15 VDC 2 15 VDC 3 GND 4 GND 5 GND 6 5 VDC 7 24 VDC 8 NC POWER CABLE DIAGRAM 6103 SERVICE MANUAL REV 5 42 OCTOBER 2011 50 op LM556CNA gt 5 406 9 a e 5 74 04 gt GLM324AN 8 5 L p 74HC123 79 gt LE 15 5 0 07524 29 al 74 541 5 6103 SERVICE MANUAL REV 5 43 OCTOBER 2011 Q OVREF AGND T5V TP5O TP8 17O PGND A 15V TP2 TP15 O 24 O TP17 100 us TP12 Q TP4 R35 R46 410 SOLDER SIDE 6103 SERVICE MANUAL R
42. ressing the VIEW key once more will bring back the main ozone calibration screen Examples For 5ppm Maximum For 1 0ppm Maximum 03 SET TRUE 03 SET TRUE 1 030 022 1 050 037 2 300 339 2 500 522 3 500 545 3 1 000 1 095 11 Once all ozone points have been run and the values recorded stop and exit the calibrate ozone mode with NO SAVE 12 Re enter the calibrate ozone mode and enter the pressure recorded in step 9 into the cal press field forth row and press the ENTER key 13 Enter all ozone points recorded in step 9 they must be entered in ascending order starting with point 1 in the table Enter the corresponding photometer reading in the second true column Fill in all unused fields set and true with zero 14 Press EXIT and SAVE 15 Exit out of the system mode and select the FLOW mode and verify 3 points 1096 5096 and 100 using the same total flow rate used during the collection of calibration data points Allow the ozone concentration level to stabilize before accepting the reading from the photometer Repeat for all verification points IMPORTANT Using the MENU key make sure 03 CTRL is OFF 6103 SERVICE MANUAL REV 5 13 OCTOBER 2011 CALIBRATION SYSTEM ADC CALIBRATIONS PHOTOMETER BLOCK TEMPERATURE Use calibrated temperature meter with surface sensing probe This ADC is used for display and troubleshooting purposes only The value fed back from this ADC does not impact the p
43. strument To use a Status Output to provide a contact output connect the inputs for the device you being controlled to the desired STATUS OUTPUT pin and to GROUND To use a Status Output to provide a powered 24 volt output to drive a relay for example connect the inputs for the device you are controlling to the desired STATUS OUTPUT pin and to 24 VOLTS 6103 SERVICE MANUAL REV 5 27 2011 PC416 FUNCTION CONTINUED Reference user s manual for more detailed instructions on the setup and operation of the status I O lines Caution Each status output can sink a maximum of 100 mA Do not connect anything to the outputs such as a solenoid valve that will draw more than 100 mA as this will result in damage to the instrument 16 TEST POINTS TP VALUE 1 5 5 VDC Steady state TP2 GND GND meter reference for TP3 100KHZ See 416 diagram on page 40 for waveform TPA PGND This is the power 24V DC ground test point for the negative black meter lead when measuring the 24 VDC test point TP5 5 24 24 VDC steady state 0 Values in parenthesis are as seen on the silkscreen 6103 SERVICE MANUAL REV 5 28 OCTOBER 2011 TROUBLESHOOTING POWER PROBLEMS System display does come and front panel power switch is not illuminated SOLUTION Check power cord connection and power source voltage Environics recommends the use of a power conditioner
44. the response voltage is changing at the same rate as the instability of the blend Verify input pressure stability Often the input gas source especially for MFC1 will be shared with another process or operation outside of the blender Although the MFC can adjust for slow changing pressure it cannot respond the pressure fluctuations that occur less than an approximate 10 second cycle Remove all output plumbing connections to verify that something downstream of the system is not causing the instability Replace the MFC Flow rate is saturated regardless of command INDICATIONS concentration is too high MFC2 saturated or concentration is to low MFC1 saturated This normally indicates a failure within the MFC However first check all PC412 steady state voltages Follow previously recommended procedure in POWER PROBLEM section if voltages are not correct Replace MFC 6103 SERVICE MANUAL REV 5 31 2011 OZONE PROBLEMS No ozone when commanded Note For all ozone related problems always check the steady state test point values on the PC410 first If there is a problem with TP10 11 or 13 measure the respective test points on the PC412 These voltages are routed from the power supply to the PC412 to the PC410 Follow the recommended procedure under POWER PROBLEM section Note If determining an ozone problem using the internal photometer also refer to the photometer problem s
45. to 30 minutes before stabilizing Especially if the photometer is not being used to control the ozone generator If the System is not used on a daily basis drift will be more common Environics recommends that during the power up period the system be run with ozone to help condition the plumbing and burn in the lamp A 1 hour period is recommended Make sure that the ozone block temperature is stable A drifting block temperature will cause the ozone to drift The ozone block temperature should be stable between 48 and 51 degrees C and can be monitored on TP15 on 410 The voltage should be between 4 8 and 5 1 VDC Make sure that the ozone command is not drifting TP4 on PC410 This command voltage is also impacted by pressure correction when the photometer control loop is off If TP4 is drifting check TP17 for stability as well If TP17 is drifting disable pressure correction in PREFS and run again If the ozone becomes stable then there is a false indication of pressure drift Replace PC410 If drift is consistent despite burn in replace the ozone lamp Optics have become contaminated by external contaminate EX Oil from compressor system Replace ozone generator OCTOBER 2011 OZONE PROBLEMS Ozone is present without command SOLUTION Make sure that the zero potentiometer R46 is adjusted so that the voltage at TP2 on PC410 is between 80 and 100 mv with a zero ozone command Note An
46. y adjustments to this potentiometer will affect calibration If this adjustment is set incorrectly to low it can cause the ozone lamp to light with no command Ensure that the command voltage at TP4 on 410 is zero Lamp drive circuit or photo detector circuit on the PC410 may be bad replace PC410 Note whenever replacing the 410 the ozone generator will need to be recalibrated Ozone level is high when commanding ozone and cannot be controlled Ozone level is not stable Photometer control loop is on and pump is not activated or engaged Verify the pump is on or turn the control loop off as outlined in the user s manual Verify ozone calibration data PC410 photo detector circuit has failed Replace PC410 If using the photometer control loop to control the ozone generator turn the control loop off to verify if instability is related to the photometer control If so proceed to troubleshooting section for photometer problems Check ozone block temperature and pressure test points as outlined in the ozone drift section 6103 SERVICE MANUAL REV 5 2011 OZONE PROBLEMS Ozone level is not stable PHOTOMETER PROBLEMS Not reading ozone SOLUTION Noisy lamp replace lamp 410 is generating noisy lamp signal Replace PC410 Note Whenever replacing the PC410 the ozone generator will need to be recalibrated SOLUTION If in the photo
47. y readings decrease the INTEG using the same process as outlined in step 3 above 5 Perform steps 3 and or 4 until the intensity values are within the range of 500K to 850K 6 If the locations for the sample and reference frequencies are filled with asterisks then the INTEG time is set too high Lower the INTEG TIME value to recover 6103 SERVICE MANUAL REV 5 6 OCTOBER 2011 CALIBRATION SYSTEM MODE MFC FLOW CALIBRATION PROCEDURE 1 The unit must be powered on for at least 1 hour prior to starting this procedure 2 Select the SYSTEM mode from one of three main menus From the SYSTEM mode scroll down to and select LEAK TEST Perform the leak test as outlined in the LEAK TEST section of this manual Note there are two leak test modes 1 The SYSTEM MODE LEAK TEST displays any leak using absolute zero leak as a reference 2 The leak test mode from the main menu uses the maximum factory acceptable leak of three SCCM as a reference The SYSTEM MODE LEAK TEST should be used prior to flow calibration The leak test in the main menu will show any new leaks that may have developed since calibration 3 After the leak test only remove one of the caps on the output manifold ports making sure that the two remaining outputs and the vent port remain capped 4 With no gases connected to the system start both MFC1 and MFC2 in the FLOW mode reference the user s manual for instruction on using the FLOW mode Command the maximum flow al
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