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Model MG8E Paramagnetic Oxygen Analyzer

1. IM 11P03A05 01E jos Function Factory Default 00 Entering password 01 Executing calibrations 02 Setting calibration gas concentrations ZERO key 0 000 SPAN key 20 95 03 Checking calibration coefficients 04 Setting output hold function during calibration 0 enabled 05 Initializing calibration coefficient 10 Setting remote range switching contact input 1 disabled 11 Selecting range 3 range 3 12 Setting span for range 1 Minimum range of the specified measuring range 13 Setting span for range 2 010 0 to 10 range 14 Setting span for range 3 025 0 to 25 range 16 Fixed analog output 20 Setting low limit alarm 00 00 21 Setting high limit alarm 25 00 22 Setting high low limit alarm function 0 disabled 23 Setting low auxiliary gas pressure alarm function 0 disabled 30 Checking temperature C of constant temperature chamber 31 Checking sensor emf mV 40 Executing error check 41 Resetting sensor emf error status 42 Resetting calibration coefficient error status 43 Setting output hold function when error occurs 1 enabled at last measured value 44 Setting preset value 00 00 45 Setting contact output status when error occurs 0 contact closes when error occurs 50 Setting initial wait time for automatic calibration 00 00 0 day 0 hour 51 Setting interval for automatic calibration 30 00 30 days 0 hour 52 Setting zero calibration time 10
2. 25 ple Cable inlet port Cable inlet port Cable inlet port Mounting holes Note that the instrument s weight is approximately 38kg If the wall for mounting the instrument is not sufficiently sturdy use an angle steel support 3 M8 depth12 320 4 10 holes 360 Position of holes for installation F4 1E ai Figure 4 1 Mounting of Analyzer IM 11P03A05 01E 5 NAMES OF COMPONENTS 5 1 9 NAMES OF COMPONENTS Displays and Indicators Sensor Angle Adjustment Screw Not provided for instrument with measuring range of 0 596 O2 Operation Keys F5 1E ai Figure 5 1 Operation Panel Sensor Angle Adjustment Knob External Connection Terminals Sensor Unit Auxiliary Gas Pressure Gauge Note Fuses in Constant Temperature Chamber F5 2E ai Figure 5 2 Inside of Analyzer AN NOTE Note The auxiliary gas pressure gauge reads the secondary pressure of the pressure regulator in the sensor unit and needs no adjustment IM 11P03A05 01E 6 PIPING gt 6 1 6 PIPING ZN caution Before connecting pipes to the MG8E including the gas sampling unit thoroughly purge the pipes and make sure that there are no moist air and other contaminants trapped inside 1 Figure 6 1 shows the standard piping diagram Connect metal piping tubes of approximately 16 44 mm so that no leakage occurs 2 Apressure regulator and pre
3. 3 Press the SPAN key 4 Setthe oxygen concentration of the span gas using the SHIFT INCR and DP keys Press the EXEC key to accept The setting range is 0 5 to 25 O2 10 5 3 Manual Calibration Azero calibration should be performed first and then a span calibration Zero and span calibrations must be conducted in the first calibration after start up and after the initialization of the calibration coefficient 1 Switch to MAINT mode and enter the password 2 Change the Function Number to 01 The DATA display shows the current oxygen concentration 3 Press the ZERO key Turn off the sample gas flow and apply the zero gas at the specified flow rate in the sample gas line When solenoid valves for automatic calibration are installed pressing the ZERO key closes the solenoid valve in sample gas line and opens the solenoid valve in zero gas line 4 The oxygen concentration on the DATA display changes When the reading has stabilized completely press the EXEC key The instrument is now calibrated to that value as the zero point b Press the SPAN key Turn off the zero gas flow and apply the span gas at the specified flow rate When solenoid valves for automatic calibration are installed pressing the SPAN key closes the solenoid valve in zero gas line and opens the solenoid valve in span gas line 6 The oxygen concentration on the DATA display changes When the reading has stabilized completely press the EXEC key
4. 10 START UP 10 2 Warm up After power up the instrument goes through a warm up period and then reaches steady state where itis ready for measurement This section describes how the instrument behaves during the warm up period The instrument controls the temperature so that the temperature in the sensor unit is kept at 55 C It may take approximately 2 5 hours until the temperature in the sensor unit has stabilized at 55 C The required time varies depending on the temperature in the sensor unit at start up or ambient temperature At first the heater temperature rises to 60 C to warm the sensor unit quickly and then the heater temperature goes down to 55 C as the sensor unit gets warmer When the temperature in the sensor unit approaches 55 C the DATA display shows oxygen concentrations and the MAINT lamp starts to blink At the same time the instrument provides analog outputs corresponding to the output range This period is called a stabilization period and in this period a temperature drift may occur since the temperature in the sensor unit has not completely stabilized A calibration cannot be executed in this period When the temperature in the sensor unit stabilized completely the MAINT lamp stops blinking and the MEAS lamp turns on This is a steady state During a warm up period the analog output is fixed at 4 mA During warm up and stabilization periods the maintenance status contact is activated Figure 10 1 shows the temp
5. 10 minutes 53 Setting span calibration time 10 10 minutes 54 Setting purge time 10 10 minutes 55 Executing span calibration 1 executes span calibration 56 Setting the number of times of skipping span calibrations 00 no skipping 57 Starting automatic calibration function 0 OFF 58 Manual operations of solenoid valves 67 Checking error status 98 Checking firmware revision 99 Initialization 14 INSPECTION AND MAINTENANCE 14 1 14 INSPECTION AND MAINTENANCE This chapter describes the inspection and maintenance procedures to ensure optimum performance of the instrument and to keep it in good operating condition NWARNING Open circuit at non hazardous location before removing the MG8E cover The nameplate of the MG8E says Open circuit at non hazardous location before removing cover because the internal energy does not decrease below the specified value According to USERS GUIDELINES for Electrical Installations for Explosive Gas Atmospheres in General Industry published by Tecnology Institution of Industrial Safety in Japan the expression a non hazardous area is defined as A non hazardous area is considered a place where no occurrence of explosive gas atmosphere is guaranteed by the foreperson and confirmed by a written document Therefore if a non hazardous area is secured the work can be done on site 14 4 Checking the Auxiliary Gas Check that the needle on the auxiliary g
6. Oz enter 025 Now range 1 is set to 0 to 25 In the same manner set the upper range values for ranges 2 and 3 in Function Numbers 13 and 14 respectively Change the Function Number to 11 Select the desired range 1 for range 1 2 for range 2 or 3 for range 3 using the SHIFT and INCR keys Press the EXEC key to accept AN NOTE The setting range is determined by the measuring range specified in the Model and Suffix Codes IM 11P03A05 01E 10 4 10 START UP 10 5 Executing Calibrations 10 5 1 After start up and switching to MEAS mode zero and span calibrations must be executed Always a zero calibration should be performed prior to a span calibration Chapter 12 Calibration explains the calibration principle in detail This section describes how to set the concentrations of calibration gases and how to perform zero and span calibrations manually Calibration Gas Requirements As the zero gas use nitrogen gas of 99 999 purity or more when the measuring range is under 0 to 5 O or use nitrogen gas of 99 99 or more when the measuring range is 0 to 5 O2 or more As the span gas use a gas with an oxygen concentration of 80 to 9096 of the upper range value of set range e g for the range of 0 to 25 the span gas should be 20 to 25 oxygen 10 5 2 Setting Calibration Gas Concentrations 1 Switch to MAINT mode and enter the password 2 Change the Function Number to 02
7. opens solenoid valve in span gas line 67 Checking error status For service O O 98 _ Checking firmware revision O O 99 Initialization O Data can only be viewed Data can be changed or functions can be executed Note Setting ranges depend on Model and Suffix Codes IM 11P03A05 01E 10 START UP 10 1 10 START UP This chapter describes the procedures for supplying power setting operation parameters and manual calibration 10 1 Supplying Power Before supplying power to the instrument make sure that 1 2 3 4 5 ma a the installation piping and wiring have been done correctly the auxiliary gas is being supplied at the specified pressure the supply voltage meets the instrument specifications and no sample gas has been introduced the case cover is securely closed and the six cover bolts are firmly tightened Then supply power to the instrument Upon power up the instrument displays show as follows Display Description DATA All segments on both DATA and FUNC displays turn on for about two seconds DATA m 1 The firmware revision appears for about three seconds The number shown at left is an example DATA LJ LJ DATA The instrument enters a warm up period As shown at left the DATA display alternates between uuuu and the current heater temperature during the warm up IM 11P03A05 01E 10 2
8. 11P03A05 01E 7 2 7 WIRING 7 2 Wiring Precautions For external cable wiring use only the flameproof cable glands specified by Yokogawa Table 7 1 For details about wiring for the flameproof or explosionproof equipment refer to the relevant guides of the local and international standards to ensure proper wiring The following instructions must be observed when wiring 6 7 7 3 1 Turn off all the power before wiring Do not route electrical wiring and wiring for large capacity converters and motors or power wiring in the same wiring duct The thread parts must be waterproofed Non hardening silicone sealant is recommended To prevent errors due to noise do not route signal cables and power cables in the same cable hole When running cables in a place where ambient temperature is high or low use cables suited for that condition When running cables in an atmosphere where hazardous gas or liquid or oil or solvent is present use cables made of materials that can withstand such aggressive conditions For wire termination use crimp terminals M4 screws with insulating sleeves Cable Specifications For the wiring use PVC insulated PVC sheathed control cables CVV PVC insulated PVC sheathed shielded control cables CVVS or other suitable cables If necessary run the cable in a steel conduit or other suitable tube or duct for protection against damage The thread parts must be waterproofed with a
9. 35 ml min 55 ml min when sample gas contains H gas of 3 or greater and O in He Power supply 100 115 V AC 50 60 Hz Language Japanese English Option Note 1 Balance gas CO 20 N T3 2 ai For wiring to the MG8E paramagnetic oxygen analyzer always use the specified external cable lead in cable grands shown in the table below Note 2 Two pressure packing adapters part number G9601AE are mounted on the MG8E cable inlet ports for power supply and output signal Blind plugs are mounted on the remaining four cable inlet ports Note 3 If wiring to other than the power supply and output signal is necessary prepare the following additional items as required The number of external cable lead in cable grands possible for mounting is as follows Cable grounding Up to 6 pieces Note 4 Material of measurement gas seal is Daielperfrow tetrafluoroethylene perfluoro methyl vinyl ether rubber when cell material is organic solvent resistant Note 5 Consult Yokogawa for balance gas other than option code B1 External Cable Lead in Cable Grands Part No Part Name Specification G9601AE Cable grands ud E K9356AG Cable grands Gable ee ann T3 3 ai STANDARD ACCESSORIES Item Parts No Qty Description Fuse A1111EF 2 250V 2A Hex headwrench User s Manual 1 T3 4ai IM 11P03A05 01E 3 6 3 S
10. All outputs are voltage free dry contacts mechanical relay contacts and rated 3A at 250 V AC or 30 V DC High Low limit alarm contact output or Maintenance mode FAIL Auxiliary gas pressure range contact output contact output contact output lowering contact output CONTACT ia RANGE OUT HL ALM MAIT CAL FAIL LO AUX GAS R3 HI A R2 LO lolojolo Higher Level Devices Annunciators etc F7 4E ai Figure 7 4 Contact Output Wiring IM 11P03A05 01E 7 WIRING 7 5 7 4 4 4 Wiring for High Low Alarm Contact Output Range Answerback Contact Output Either high low alarm contact output or range answerback contact output can be selected For their detailed functions and setting procedures refer to Chapter 11 Parameter Settings Terminal 12 is a common terminal and the contact between terminals 10 and 12 and the one between terminals 11 and 12 will open or close in response to the instrument status For external connections to higher level devices or other instruments refer to Figure 7 1 Both contacts are open when the instrument is not powered Terminal No High Low Alarm Contact Output Range Answerback Contact Output i High Alarm Low Alarm Range 1 Range 2 Range 3 10 12 Closed Open Open Closed 11 12 Closed Open Closed Open 7 4 4 2 Wiring for Maintenance Status Contact Output The contact between terminals 13 and 14 is closed during maintenance For its functions refer to Chapter 11 Pa
11. Hold During Calibration 1 Switch to MAINT mode and enter the password 2 Change the Function Number to 04 3 Setthe output hold function during calibration using the SHIFT and INCR keys To enable the function i e the analog output is held at the last measured value set to 0 or to disable the function set to 1 Press the EXEC key to accept IM 11P03A05 01E 11 2 11 PARAMETER SETTINGS 11 1 2 Setting the Output Hold Function When an Error Occurs The output hold function when an error occurs is selectable to enabled the analog output is held at the last measured value or at a preset value or disabled the analog output continues to provide concentration values 1 Switch to MAINT mode and enter the password 2 Change the Function Number to 43 3 Setthe output hold function when an error occurs using the SHIFT and INCR keys To enable the function and hold the analog output at the last measured value set to 1 to enable the function and hold the analog output at a preset value set to 3 or to disable the function set to 2 Press the EXEC key to accept 4 Toseta preset value change the Function Number to 44 b Setthe desired preset value using the SHIFT INCR and DP keys Press the EXEC key to accept A preset value is expressed as a percentage where 4 mA is 0 and 20 mA is 100 Enter 0 to set the preset value to 4 mA or enter 100 to set to 20
12. IMPORTANT If the fuse blows again soon after replacement there may be a malfunction in the circuit or in the external connections Immediately turn off power to the instrument and investigate the cause Flat Head Socket Screwdriver Fuse F14 1E ai Figure 14 1 Fuse Removal IM 11P03A05 01E 14 4 14 INSPECTION AND MAINTENANCE 14 5 Other Instructions 1 Forinspection and maintenance of sampling systems read corresponding user s manuals 2 Forthe cleaning and overhaul of the sensor unit consult Yokogawa 14 6 Replacing the Limited Life Component The following component has a limited life It is recommended that it should be replaced approximately every five years As for the replacement ask Yokogawa Power unit located on the back of the terminal block and normally not visible IM 11P03A05 01E 15 TROUBLESHOOTING 15 1 15 TROUBLESHOOTING This chapter describes errors detected by the self diagnostic function and troubles during measurement such as output fluctuations NWARNING Open circuit at non hazardous location before removing the MG8E cover The nameplate of the MG8E says Open circuit at non hazardous location before removing cover because the internal energy does not decrease below the specified value According to USERS GUIDELINES for Electrical Installations for Explosive Gas Atmospheres in General Industry published by Tecnology Institution of Indus
13. Location The following conditions must be observed in selecting the location 1 2 3 4 A place that meets the explosion proof specifications Minimum influence from shock or vibration The least corrosive atmosphere A daytime variation in the ambient temperature of less than 15 C In particular avoid installing the analyzer in a location where the temperature may abruptly change No exposure to rain drop and direct sunlight In a place where exposed to direct sunlight provide a shade No exposure to high radiant heat steam or heat convection from a process plant Minimum influence from an electromagnetic field Avoid as much as possible parallel wiring with power supply cables or areas close to motors electromagnetic relays or pumps Easy implementation of maintenance and inspection IM 11P03A05 01E 4 2 4 INSTALLATION 4 2 Mounting Procedure The standard mounting of the analyzer is a wall mounting Attach the mounting bracket to the back of the body using bolts M8x 14 lock washers and flat washers Using the four mounting holes fix the body to the wall in such a way that there is no gap between the body and the wall Note In consideration of the instruments weight approximately 38kg use a channel steel support if necessary Securely fix the analyzer so that the mounting angle does not change Vibration or fluctuation in the position of the analyzer may cause errors Unit mm
14. MAINT mode The following describes how to change the Function Number Key Operation FUNC DATA Procedure GU PUG Switch to MAINT mode Enter the password US Press the left FUNC key to increase the tens digit and press the right FUNC key to increase the ones digit on FUNC display When the Function Number is displayed the assigned parameter is shown on DATA display The Function Number can be changed even if the password is not effective in MAINT mode However in some functions parameters are not shown unless the password is effective In this case the DATA display shows For details refer to Table 9 3 Inthe Function Number to which no function is assigned the DATA display shows 9 3 4 Returning to MEAS Mode from MAINT mode The instrument can be returned to MEAS mode from anywhere in MAINT mode by pressing the EXEC key while holding the MEAS MAINT key IM 11P03A05 01E 9 5 9 OPERATIONS 9 3 5 Entering Values This section explains how to enter values As an example the procedure for changing oxygen concentration value in Function No 02 is shown below The concentration of span gas is changed from 20 95 to 0 980 Key Operation FUNC DATA Procedure Switch to MAINT mode Enter the password Uc UUUU Press FUNC keys to show 02 on FUNC display ZERO lamp turns on DATA display shows 0 000 Uc egs
15. The instrument is now calibrated to that value as the span point 7 Turn off the span gas flow Apply the sample gas and switch to MEAS mode IM 11P03A05 01E 10 START UP 10 5 10 6 Adjustment for Interference Gas Compensation Using Process Gas This adjustment is usually not required If necessary the sensor angle should be adjusted using the actual process gas by turning the adjustment screw on the case door The adjustment screw is not provided if the instrument has a measuring range of 0 to 596 O2 by the Model and Suffix Codes Therefore the sensor angle of the instrument cannot be adjusted externally 1 After manual calibration introduce the process gas 2 Afterthe output has stabilized turn the sensor angle adjustment screw in the center of the door until the output agrees with the oxygen concentration of the process gas 3 If the composition of the process gas has changed this adjustment should be conducted after zero and span calibrations AY NOTE The sensor angle is adjusted at the factory before shipment Upon installation on site the factory adjustment can be reproduced by the level adjustment in accordance with the procedure described in Section 8 1 Adjustment of the Level in the Sensor Unit Only if the factory adjustment is not sufficient due to strong interference the adjustment using the accrual process gas is needed For details refer to Chapter 16 Measurement Principle IM 11P03A05 01E 1
16. after warm up period H ALM Lights when measured oxygen concentration exceeds high limit alarm value L ALM Lights when measured oxygen concentration falls below low limit alarm value ENABLE Lights when password entered is effective in MAINT mode INHIBIT Lights when password is not effective in MAINT mode Lights when span calibration is selected in calibration SPAN Lights when span gas is selected in calibration gas concentration setting Blinks when span calibration is required Lights when zero calibration is selected in calibration ZERO e Lights when zero gas is selected in calibration gas concentration setting Turns on and off in response to power on off status of heater for constant temperature HEATER chamber AUTO CAL Lights when automatic calibration function is enabled RMT RANGE Lights when range switching function at contact input is enabled LCL RANGE Lights when range switching function at contact input is disabled IM 11P03A05 01E 9 OPERATIONS 9 3 Basic Operations This section describes the basic operations of the MG8E paramagnetic oxygen analyzer In this section X pointer in the key operation fields indicates the key to be pressed and light gray characters in DATA fields indicate blinking characters on the display 9 3 1 Switching from MEAS Mode to MAINT Mode In MEAS mode the DATA display on the instrument shows oxygen concentrations in steady state and in MAINT mode operation pa
17. ann nn nnnnn nenn nun 5 1 6 PIRING ei a nenne ehren 6 1 T joe 7 1 7 1 External Connection Terminals eene 7 1 7 2 Wiring Precautlons erret Renee Einen Bananen nee 7 2 7 3 Cable Specifications irte ani 7 2 7 4 External WirIND lt lt lt o lt o osas 7 3 7 4 1 Power Wiring and Grounding eec 7 3 7 4 2 Analog Output Winn Gs vitrina tia edo Eas 7 3 7 4 3 Wiring for Solenoid Valves for Automatic Calibration 7 4 7 44 Contact Output Wi ae 7 4 7 4 5 Contact Input Wirllig 5 5 6 n ee 7 6 8 PREPARATIONS aan a 8 1 8 1 Adjustment of the Level in the Sensor Unit eese 8 1 8 2 Checking the Auxiliary Gas Pressure eene 8 2 8 3 Checking Sample s inire trien olaa alas olla xaxa E cate 8 2 IM 11P03A05 01E vi 10 11 12 IM 11P03A05 01E lt CONTENTS gt OPERATIONS cun 9 1 9 1 Operation Keys a 9 1 9 2 Displays and Indicators eee eren 20000000 ains ains anna anna are 9 2 9 3 Basic Operations iii ras 9 3 9 3 1 Switching from MEAS Mode to MAINT Mode en 9 3 9 3 2 Entering the Password sesssssseeeeenenemenns 9 3 9 3 3 Changing the Function Number essen 9 4 9 3 4 Returning to MEAS Mode from MAINT
18. at 55 C during a stabilization period and in steady state When a constant temperature chamber error occurs turn the power off and on again to restart and after the instrument enters a stabilization period check the temperature of the constant temperature chamber in Function No 30 If the temperature fluctuates possible causes are 1 The power supply voltage fluctuates 2 The ambient temperature is outside the specification range 5 to 50 C 15 1 2 3 Constant Temperature Chamber Errors E 22 E 23 A constant temperature chamber error E 22 or E 23 occurs while the instrument is in a warm up period Turn the power off and on again After the constant temperature chamber has cooled down sufficiently restart the instrument If the same error occurs there may be a failure in components for temperature control Contact Yokogawa Service 1 E 22 A possible cause is heater disconnection or action of the internal thermostat for over temperature protection 2 E 23 A possible cause is a failure in of parts for heater power control When an E 23 error occurs the internal thermostat may be activated at the same time The internal thermostat is activated when the temperature reaches approximately 70 C but is not reset automatically even when the temperature drops 15 1 2 4 Analog Errors E 30 E 31 E 32 E 33 An analog error occurs when there is a failure in the analog circuit Turn the power off and on again to restart the i
19. blinking indicating that the change has been accepted IM 11P03A05 01E 9 OPERATIONS 9 7 9 3 7 Functions Numbers The functions assigned to the Function Numbers are listed in Table 9 3 In some functions parameters are not shown unless the password is effective in MAINT mode Table 9 3 Function Numbers Func Password Function Setting and Range ot No Effective Effective 00 _ Entering password TRES ZERO key executes zero calibration 01 Executing calibrations SPAN key executes span calibration d 02 Setting calibration gas ZERO key for zero gas concentration 0 to 6 O o concentrations SPAN key for span gas concentration 0 5 to 25 03 Checking calibration ZERO key displays zero calibration coefficient O o coefficients SPAN key displays span calibration coefficient Setting output hold function Ti 04 during calibration 0 enabled 1 disabled O Initializing calibration 05 coefficient UT 9 Setting remote range E 10 switching contact input 1 disabled 2 enabled O 11__ Selecting range 1 range1 2 range2 3 range 3 O O 12 Setting span for range 1 1 to 25 O2 O 13 Setting span for range 2 1 to 2576 O2 O O 14 Setting span for range 3 1 to 25 O2 O O ZERO key 4 mA 16 Fixed analog output SPAN key 20 mA O 20 Setting low limit alarm 0 to 25 O2 O O 21 S
20. calibration time Function No 53 and purge time Function No 54 refer to Section 12 3 2 Semiautomatic Calibration Initial wait time Function No 50 The amount of time until the first calibration is executed after the automatic calibration function was started The setting range is from O day 0 hour to 99 days 24 hours When the time is set to 00 day 00 hour the initial wait time is equal to the time set as the calibration interval Function No 51 Calibration interval Function No 51 Set the time interval for automatic calibration The setting range is from O day 1 hour to 99 days 24 hours Execution of span calibration Function No 55 Set whether or not to execute span calibration To execute only zero calibration and not to execute span calibration set to 0 To execute both zero and span calibrations set to 1 The number of times of skipping span calibrations Function No 56 The number of times of skipping span calibrations can be set only when 1 is set in Function No 55 Setting to 0 here means that span calibration is not skipped i e both zero and span calibrations are executed each time Setting to 1 or greater means that span calibration is skipped the set number of times after the first zero and span calibrations The setting range is from 0 to 99 times Starting automatic calibration function Function No 57 Set to 1 to start the automatic calibration function After the set init
21. is changed Flow rate and pressure is added Description with CAUTION is added Chapter 6 Descriptions with WARNING p6 1 6 2 6 7 or CAUTION p6 8 are added Fig 6 3 description about Fail contact output is changed Note 5 description of 3rd paragraph is changed Table 6 1 Connection size and Part Number is changed Chapter 7 Figure 7 1 Explanation about Cell angle adjustment is added Chapter 8 Descriptions with WARNING p8 1 and CAUTION p8 3 8 4 8 8 are added Section 8 1 Arrangement of subsection Subsection 8 1 3 description is changed Subsection 8 2 2 Procedure and Status of Item 2 is changed Chapter 9 Section 9 1 Item 3 is added to the description of FUNCTION No 02 Section 9 3 Item 4 is added to the description of E 2 About E 5 description of item 1 is changed Chapter 10 Arrangement of sections and subsections Description with CAUTION p10 4 is added Parts of description are changed or added in subsection 10 2 5 10 7 2 10 7 4 and 10 7 5 Chapter 11 Description with WARNUNG p11 1 is added Section 11 2 Description is added and changed Chapter 12 Description with WARNUNG p12 1 is added Section 12 1 12 2 12 5 12 6 12 7 Description is added and changed Section 12 8 is newly added CMPL On page 2 parts No of item 3 is changed Revision Information is newly added Apr 1994 1st Edition Newly published IM 11P03A05 01E W f you want have more information about Yokogawa produc
22. mA The setting range is from 10 2 4 mA to 110 21 6 mA The minus sign will appear by pressing the INCR key repeatedly when the leftmost digit is blinking The number increases 0 1 2 9 7 and returns to 0 IM 11P03A05 01E 11 PARAMETER SETTINGS 11 3 11 2 Setting the Fail Contact The Fail contact terminals 15 and 16 is activated when an error occurs The contact can be configured to open or close when an error occurs The contact is open when the instrument is not powered For details about errors refer to Chapter 15 Troubleshooting Switch to MAINT mode and enter the password Change the Function Number to 45 Set the Fail contact state using the SHIFT and INCR keys To set the contact to close when an error occurs enter 0 or to open when an error occurs enter 1 Press the EXEC key to accept 11 3 Action of the Maintenance Status Contact The maintenance status contact terminals 13 and 14 is closed during the following states and is otherwise open The contact is open when the instrument is not powered 1 2 Warm up period Stabilization period MAINT mode The MAINT lamp is lit while the instrument is in MAINT mode MAINT mode starts when the MEAS MAINT key is pressed and held then the EXEC key is pressed and ends when the same key operations are done to return to MEAS mode Semiautomatic or automatic calibration The maintenance status contact is closed during calibratio
23. name and serial number and a description of the problem Any diagrams or data explaining the problem would also be appreciated If we replace the product with a new one we won t provide you with a repair report Yokogawa warrants the product for the period stated in the pre purchase quotation Yokogawa shall conduct defined warranty service based on its standard When the customer site is located outside of the service area a fee for dispatching the maintenance engineer will be charged to the customer In the following cases customer will be charged repair fee regardless of war ranty period Failure of components which are out of scope of warranty stated in instruction manual Failure caused by usage of software hardware or auxiliary equipment which Yokogawa Electric did not supply Failure due to improper or insufficient maintenance by user Failure due to modification misuse or outside of specifications operation which Yokogawa does not authorize Failure due to power supply voltage frequency being outside specifications or abnormal Failure caused by any usage out of scope of recommended usage Any damage from fire earthquake storms and floods lightning disturbances riots warfare radiation and other natural changes Yokogawa does not warrant conformance with the specific application at the user site Yokogawa will not bear direct indirect responsibility for damage due to a specific applica
24. sensor emf at the initial span calibration sensor emf at zero calibration sensor emf at span calibration 0 cz c Oxygen Concentration 02 F12 1E ai Figure 12 1 Sensor emf vs Oxygen Concentration The ratio of the oxygen concentration to the sensor emf is calculated from the sensor emf values p1 and p2 obtained in calibration c p2 pl Assuming that the sensor emf when sample gas is applied is ps the concentration of the sample gas cs is obtained from the following equation cs k x ps pl Calibration is for obtaining k When only a zero calibration is performed the instrument is calibrated to the zero gas s value and the ratio of the oxygen concentration to the sensor emf k that was obtained from the previous calibration is used IM 11P03A05 01E 12 2 12 CALIBRATION 12 2 Calibration Coefficient The calibration coefficient is a deviation from the initial calibration value 12 2 1 Zero Calibration Coefficient The zero calibration coefficient is the deviation between the sensor emf obtained when a zero calibration is performed and the initial calibration value and is expressed as the one corrected for oxygen concentration It is cz 96 Oz in Figure 12 1 When the zero calibration coefficient cz is outside of 1 25 O a zero calibration coefficient error will occur 12 2 2 Span Calibration Coefficient The span calibration coefficient is the deviation between the ratio of the ox
25. unaffected by other gases It is highly sensitive and offers excellent response Its detector has a sturdy construction to protect against vibration and shock Gas flow ratio detection ensures long term stability and reliable measurement because sample gases do not directly come into contact with the sensor and thus components in sample gases do not stick to the sensor Its analog output signals are isolated from the internal circuit In addition to these features its one touch calibration function and self diagnosis function provide high operability maintainability and reliability Standard System Configuration The standard system configuration of the MG8E paramagnetic oxygen analyzer is shown in Figure 2 1 Vent to atmosphere Model MG8E Analog is output Stop Valve ae Contact output Zero gas Contact ontac Flow rate mmm 300 to 800 Span gas 3 input ml min _ _ Power supply Pressure 7 kPa or more Sample gas Filter 350 to 500kPa Auxiliary gas 3 Pressure Pressure regulator gauge F2 1 ai Figure 2 1 System Configuration Diagram A IMPORTANT Auxiliary gas N2 gas is required in accordance with the measurement principle of the instrument Before supplying power to the instrument be sure to introduce the auxiliary gas IM 11P03A05 01E 2 2 2 OVERVIEW 2 2 System Configuration with Automatic Calibration The system configuration that includes an automatic calibration option is shown in Figure
26. 1 PARAMETER SETTINGS 11 1 11 PARAMETER SETTINGS 11 1 Output Hold 11 1 1 Analog output is held at a constant value when the instrument is in the following conditions During a warm up period analog output is held at 4 mA During calibration analog output is held at the last measured value or is not held user selectable When an error occurs analog output is held at the last measured value or at a preset value or is not held user selectable If more than one condition above occurs simultaneously the output hold are prioritized in the following order 1 When an error occurs 2 During calibration 3 During a warm up period Setting the Output Hold Function During Calibration The output hold function during calibration can be set to enabled or disabled When the function is set to enabled the analog output is held at the last measured value during calibration when set to disabled the instrument outputs measured values during calibration The hold function deactivated after the purge time has elapsed in calibration The purge time is the amount of time for sample gas to flow through the sensor unit to purge calibration gas in the unit after calibration and it is user configurable For the setting of the purge time refer to Chapter 12 Calibration Calibration Time Span Calibration Time I Output Hold Time I I I lt gt Purge Time I F11 1E ai Figure 11 1 Output
27. 2 2 Vent to atmosphere Model MG8E Analog gt output Contact output Solenoid valve Zero gas gt Contact input _ Power supply Span gas gt Sample gas 350 to 500kPa Auxiliary gas gt V Stop valve Pressure Pressure regulator 98uge Note 1 Use a deenergize to open energized closed solenoid valve for the sample gas and a deenergized to close solenoid valve for the others Note 2 These valves are used upon failure of the solenoid valve F22 ai Figure 2 2 System Configuration with Automatic Calibration A IMPORTANT Auxiliary gas N gas is required in accordance with the measurement principle of the instrument Before supplying power to the instrument be sure to introduce the auxiliary gas IM 11P03A05 01E 3 SPECIFICATIONS gt 3 1 3 SPECIFICATIONS 3 1 Standard Specifications Measurement Object Oxygen concentration in gaseous mixture Measurement System Paramagnetic system Measurement Range 0 1 to 0 25 vol O2 3 ranges can be programmed arbitrarily within the above specified range Self diagnostic content Sensor unit error Constant temperature chamber error Analog error Memory error Calibration coefficient error Analog output signal 4 to 20mA DC load resistance Maximum 5500 Contact output Contact rating 3A at 250 VAC or 30 VDC dry contacts Fail 1 point open or closed when error occurs user configurable Contact is activated whe
28. 5 11 6 Setting the Range Switching Answerback Contact Output 11 6 11 7 Setting the Low Auxiliary Gas Pressure Alarm Function 11 7 CALIBRATION scsssscessessesessessessessssessessesecsssessesessussessessesevaesacseesesseensees 12 1 12 1 el MC H 12 1 12 2 Calibration Coefficient erret tenera mann 12 2 12 2 1 Zero Calibration Coefficient ssnenene 12 2 12 2 2 Span Calibration Coefficient espeuta ani aana 12 2 12 2 3 Checking the Calibration Coefficients 4444 een 12 2 12 2 4 Initializing the Calibration Coefficients esses 12 2 lt CONTENTS gt vii 12 3 Executing Calibrations eere nnne 12 3 12 3 1 Manual CallDFatiOli ot eee ttn ene ge an 12 3 12 3 2 Semiautomatic Calibration esse 12 4 12 3 3 Automatic Calibration sse 12 5 T4 OTHERFUNCTIONS an sen 13 1 13 1 Checking the Temperature of the Constant Temperature Chamber Function No 30 otro iaa 13 1 13 2 Checking the Sensor EMF Function No 31 eene 13 1 13 3 Manual Operation of the Solenoid Valves for Automatic Calibration FunctioniNo 58 reete eterne eres 13 1 13 4 Checking the Firmware Revision Function No 98 13 1 13 5 Initializing Parameters Function
29. A display or to move blinking digit in setting A INCR Each press increases the active value by one increment in setting EXEC Used to confirm data entry or to execute function IM 11P03A05 01E 9 2 9 OPERATIONS 9 2 Displays and Indicators The displays and indicators and their functions are summarized in Table 9 2 Also refer to Figure 9 2 Operation Panel OUTPUT FUNC O FAIL vol960 O H ALM LALM HEATER OMEAS OMAINT O ENABL OINHIBIT O AUTO CAL OSPAN OZERO RMT RANGE O LCL RANGE F9 2E ai Figure 9 2 Displays and Indicators Table 9 2 Displays and Indicators Display Indicator Function Shows oxygen concentration in MEAS mode DATA Shows 0 00 when measured concentration is below zero regardless of value 2 Shows blinking value if auxiliary gas pressure falls below the setpoint when low 4 digit number e at auxiliary gas pressure alarm function is enabled Shows setting parameters in MAINT mode FUNC Shows Function No in MAINT mode 2 digit number Blank in MEAS mode OUTPUT Indicates analog output value in 10 level indicator bar Indicator runs showing actual output value even while the analog output is being held FAIL Lights when error occurs MEAS Lights when instrument is in MEAS mode Blinks when built in atmospheric sensor failed MAINT Lights when instrument is in MAINT mode Blinks when instrument is in stabilization period
30. NOTE The calibration coefficients disolayed in Function No 03 are still the previous ones after the initialization They will be updated only after zero and span calibrations after the initialization When the concentration of the zero gas is changed in Function No 02 the zero reference will be changed Accordingly the calibration coefficients will be initialized this is the same action as the initialization by the above procedure IM 11P03A05 01E 12 CALIBRATION 12 3 12 3 Executing Calibrations 12 3 1 Zero and span calibrations must be performed after the power is turned off and restarted Without valid calibration oxygen concentration cannot be measured accurately Before calibration the following should be checked 1 The auxiliary gas is being supplied at the specified pressure 1 2 Auxiliary gas and zero gas with proper nitrogen purities are used 3 The span gas concentration set in the instrument agrees with the actual gas concentration 4 Calibration gases flow at the specified flow rate without fluctuation Manual Calibration A zero calibration should be performed first and then a span calibration A span calibration cannot be executed before a zero calibration It is allowed to perform only a zero calibration but not allowed to perform only a span calibration 1 Switch to MAINT mode and enter the password 2 Change the Function Number to 01 The DATA display shows the current oxygen c
31. No 99 eene 13 2 14 INSPECTION AND MAINTENANCE eeeeeeeeeeeeeernnnnnnn nn 14 1 14 1 Checking the Auxiliary Gas esee 14 1 14 2 Checking the Sample Gas eese nennen nennen nnn 14 1 14 3 Precautions When Stopping and Restarting the Operation 14 2 14 4 Fuse Replacement ice eterne niue hann dabaa aiaia RE CARES 14 3 14 5 Other Instructions 5 ERRARE ERIRERIAE ERR E RRISERNSEEARSEKTREER Eae aa EEEE 14 4 14 6 Replacing the Limited Life Component eese 14 4 15 TROUBLESHOOTING ertet treten tnnt 15 1 15 1 Errors and Remedies rre iaa 15 2 15 1 1 Checking the Error Code sii irat ter t e een ga 15 2 15 1 2 Error Descriptions c sere beet s bee i e ade 15 3 15 2 Faulty Readings During Measurement eene 15 5 15 2 1 Fluctuations in Readings seeee 15 5 15 2 2 Driftin Readings entere tei n t e d m P Lg tg 15 5 15 2 3 Short Term Shift in Readings eee 15 5 15 3 When Calibration Cannot Be Executed eese 15 5 15 4 In the Event of Power Failure eeeeeseeeesseeeeeeeeeeee entente 15 5 15 4 1 Instantaneous Power Failure sse 15 5 15 4 2 When the Power Returns cccccceseeeeeeeeeeeeeese
32. PECIFICATIONS gt 3 4 External Dimensions Unit mm 1 Cable inlet port G3 4 2 Cable grand Cable O D 10 13 5 3 Cable grand Cable O D 10 13 5 4 Cable inlet port G3 4 5 Cable inlet port G3 4 6 Cable inlet port G3 4 7 Measurement gas inlet port Rc1 4 8 Auxiliary gas inlet port Rc1 4 9 Gas outlet port Rc1 4 F3 1 ai IM 11P03A05 01E 4 4 INSTALLATION 4 1 INSTALLATION This chapter describes installation for the analyzer and procedures and precautions for wiring and piping work Follow the procedures outlined in this chapter as much as possible NWARNING Open circuit at non hazardous location before removing the MG8E cover The nameplate of the MG8E describes Open circuit at non hazardous location before removing cover because the internal energy does not decrease below the specified value According to USERS GUIDELINES for Electrical Installations for Explosive Gas Atmospheres in General Industry published by Tecnology Institution of Industrial Safety in Japan the expression a non hazardous area is defined as A non hazardous area is considered a place where no occurrence of explosive gas atmosphere is guaranteed by the foreperson and confirmed by a written document Therefore if a non hazardous area is secured the work can be done on site 4 1 Installation
33. Press SPAN key SPAN lamp turns on DATA display shows 20 95 the default of span gas concentration The default is dependent on the specifications Uc cgs Press SHIFT key The leftmost digit of 2 blinks indicating that the digit can be changed Uc 035 Press INCR key repeatedly until 0 is displayed Uc 0195 Press SHIFT key to move the blinking digit to the right Uc 0395 Press INCR key repeatedly until 9 is displayed Uc 0980 In the same manner change the remaining digits Press DP key to move the decimal point to the desired position Uc 0980 Press EXEC key to accept The digit stops blinking indicating that the change has been accepted IM 11P03A05 01E 9 6 9 OPERATIONS 9 3 6 Selecting Data This section explains how to select and set one of parameters As an example selection of the range is shown below Key Operation FUNC DATA Procedure Switch to MAINT mode Enter the password j Press FUNC keys to show 11 on FUNC display DATA display shows 1 the currently selected range j j Press SHIFT key 1 blinks indicating that the digit can be changed Press INCR key to change the digit to the desired range number The digit cycles through only the available values in this case 1 through 3 j Press EXEC key The digit stops
34. Structure flameproof Exd II BT4X Dimensions 440 W x 370 H x 325 D mm Color Door Munsell 2 0GY7 5 0 9 epoxy resin baked Case Munsell 2 0GY3 1 0 5 epoxy resin baked Weight Approx 38 kg IM 11P03A05 01E 3 4 3 SPECIFICATIONS gt 3 2 Characteristics Repeatability 11 or less of span Linearity 11 or less of span Response Time 90 response within 3 sec measured by analog output signal change after gas is fed through the analyzer inlet Drift and Influence in Ambient Temperature Item Drift Influence in Ambient Range zero span Temperature Variation of 296 or less of span 10 C Variation of 1 596 or less of span 10 C Variation of 196 or less of span 10 C 0 1 O 296 or less of span week 0 2 to 4 O 1 5 or less of span week 0 5 to 25 Oz 1 or less of span week T3 1 ai Influence in Measurement Gas Flow 11 or less of span 10 of set value Influence in Atmospheric Pressure 1 or less of span 10 hPa IM 11P03A05 01E 3 SPECIFICATIONS gt 3 5 3 3 Model and Suffix Code Model MG8E Paramagnetic Oxygen Analyzer Flameproof Option Code Specification Paramagnetic oxygen analyzer Measure ment range 0 1 to 25 vol O 0 2 to 25 vol O2 0 5 to 25 vol O2 Cell material Standard Organic solvent resistant Auxiliary gas N gas Flow rate of auxiliary gas
35. User s Manual Model MG8E Paramagnetic Oxygen Analyzer IM 11P03A05 01E vigilantplant YOKOGAWA 4 IM 11P03A05 01E f 3rd Editi Yokogawa Electric Corporation E INTRODUCTION i INTRODUCTION m Safety Protection and Modification of the Product In order to protect the system controlled by the product and the product itself and ensure safe operation observe the safety precautions described in this user s manual We assume no liabil ity for safety if users fail to observe these instructions when operating the product If this instrument is used in a manner not specified in this user s manual the protection provided by this instrument may be impaired If any protection or safety circuit is required for the system controlled by the product or for the product itself prepare it separately Be sure to use the spare parts approved by Yokogawa Electric Corporation hereafter simply referred to as YOKOGAWA when replacing parts or consumables Modification of the product is strictly prohibited The following symbols are used in the product and user s manual to indicate that there are pre cautions for safety Media No IM 11P03A05 01E CD 3rd Edition Jan 2009 YK IM 11P03A05 01E All Rights Reserved Copyright 2007 Yokogawa Electric Corporation ii INTRODUCTION B Notes on Handling User s Manuals Please hand over the user s manuals to your end users so that they can keep the user s manu als on hand for
36. and 00 00 will be rejected Set the desired interval using the SHIFT and INCR keys Press the EXEC key to accept Change the Function Number to 55 to set whether or not to execute span calibration Set to 0 not to execute span calibration or set to 1 to execute span calibration using the SHIFT and INCR keys Press the EXEC key to accept When 1 is set in Function No 55 the number of times of skipping span calibrations should be set in Function No 56 Set the desired number of times of skipping span calibrations using the SHIFT and INCR keys Press the EXEC key to accept When 0 is set in Function No 55 appears on the display and the number of times of skipping span calibrations cannot be set Change the Function Number to 57 Set to 1 to start the automatic calibration function Press the EXEC key The timer starts counting and the AUTO CAL lamp turns on TE For automatic calibration wiring and piping for automatic calibration are required If the time to start a calibration is reached while the instrument is in MAINT mode the automatic calibration will be canceled Likewise if the time to start a calibration is reached during manual calibration or semiautomatic calibration including the purge time the automatic calibration will be canceled If the instrument is switched to MAINT mode by key operation while an automatic calibration is being conducted the automatic calibration is a
37. as must be less than a mixture of air with a flammable gas Exd II BT4X However this is an exception if it is ascertained that the gas explosion characteristics are safer than the equivalent gas Auxiliary Gas Type N2 gas not containing O2 gas equal to or greater than 0 1 of the maximum concentration of the measurement range Pressure 350 to 500 kPa average flow rate of approx 35 ml min When sample gas contains hydrogen of 396 or greater flow rate is approx 55 ml min Calibration gas Zero gas Nz gas Note Zero gas should not contain O2 gas with a concentration equal to or greater than 0 1 of the upper range value Span gas Dry air instrument air Oz 20 95 vol or standard gas containing O gas with a concentration of 80 to 10096 of the span value balance nitrogen Calibration methods 1 Automatic calibration at set intervals by internal timer 2 Semiautomatic calibration started by external contact input 3 Manual calibration in the field Warm up Time Approx 2 5 hours Installation Conditions Ambient temperature 5 to 55 C Humidity 10 9595 RH No condensing Vibration 5to9Hz Vibration amplitude 1 5 mm or less 9 to 150 Hz Acceleration 2 m s2 or less Power Supply 100 to 115 V AC 10 50 or 60 Hz IM 11P03A05 01E 3 SPECIFICATIONS gt Power Consumption 170 VA maximum approx 25 VA normally Materials in Contact with Gas JIS SUS316 stainless steel Fluorocarbon rubber Hard glass
38. as pressure gauge that is installed in the instrument is in the center of the green zone When the gas is supplied from a gas cylinder check the pressure gauge attached to the cylinder If the pressure is low replace the gas cylinder The primary pressure of the built in pressure regulator for auxiliary gas must be at least 300 kPa A low auxiliary gas pressure alarm will occur when the pressure drops below approximately 300 kPa When using a 47 liter gas cylinder replace it within 24 hours after the alarm A IMPORTANT After the gas cylinder is replaced zero and span calibrations should be conducted If air is trapped in the auxiliary gas line during replacement the reading will fluctuate and it will take long time for the reading to stabilize After the reading has stabilized completely perform the calibrations 14 2 Checking the Sample Gas Check the flow rate of the sample gas on a timely basis IM 11P03A05 01E 14 2 14 INSPECTION AND MAINTENANCE 14 3 Precautions When Stopping and Restarting the Operation The most common failure or trouble occurs when stopping or restarting the operation Extreme care should be taken 1 When sample gas contains corrosive components turn off the sample gas flow with the auxiliary gas being supplied After turning off the sample gas flow allow nitrogen gas or instrument air to flow to purge the sample gas line 2 If possible it is recommended that the auxiliary gas be allowed to flo
39. azardous area is defined as A non hazardous area is considered a place where no occurrence of explosive gas atmosphere is guaranteed by the foreperson and confirmed by a written document Therefore if a non hazardous area is secured the work can be done on site External Connection Terminals The external connection terminals are located inside the operation panel To open the panel loosen the two screws on the panel Figure 7 1 shows the diagram of the external connection terminals of the MG8E The terminal numbers are indicated on the instrument Be sure to make all connections correctly The terminal Screw thread is M4 Appropriate crimp terminals should be used The FG terminals are connected to the case Make sure that terminals G 26 and FG 27 should remain connected by a supplied jumper plate Automatic calibration Remote range Ground Output signal contact input contact input FG ANALOG OUTPUT s INPUT 4 20mA DC CAL START adig E COM High Low limit alarm contact output or Maintenance mode FAIL Auxiliary gas pressure range contact output contact output contact output lowering contact output CONTACT UTPUT RANGE OUT HL ALM MAIT CAL FAIL LO AUX GAS R3 HI ala Of a al fk K fk We Automatic calibration solenoid valve drive signal Power supply AC JUMPER PLATE SV POWER OUTPUT AUTO CAL POWER SUPPLY G K Jo Je Jo af o K Jole 26 27 F7 1E ai Figure 7 1 External Connection Terminals IM
40. been installed each Solenoid valve can be operated manually The DATA display shows oxygen concentrations This manual operation can be used for checking readings 1 Switch to MAINT mode and enter the password 2 Change the Function Number to 58 The DATA display shows an oxygen concentration 3 Press the ZERO key to open the solenoid valve in zero gas line and close the solenoid valve in sample gas line 4 Press the SPAN key to open the solenoid valve in span gas line and close the solenoid valve in sample gas line 5 Change the Function Number to the one other than 58 to close the solenoid valves for calibration gas lines and open the solenoid valve in sample gas line 13 4 Checking the Firmware Revision Function No 98 The revision of the firmware installed on the instrument can be checked in Function No 98 IM 11P03A05 01E 13 2 13 5 13 OTHER FUNCTIONS Initializing Parameters Function No 99 All parameters are initialized to the factory default settings which are summarized in Table 13 1 1 2 3 4 Switch to MAINT mode and enter the password Change the Function Number to 99 The DATA display shows rES Press the EXEC key This has not yet changed the settings settings Table 13 1 Factory Default Settings Turn the power off and on again Now the instrument has been initialized to the factory default
41. borted If the sum of the zero calibration time span calibration time and purge time is longer than the calibration interval the next calibration will be canceled When the automatic calibration function is enabled the internal timer runs even if the power supply to the instrument is interrupted After power is restored calibrations will be executed on schedule there is no delay due to the power interruption Note that the internal timer does not run when the power supply is interrupted during the calibration time Once the automatic calibration function is turned off by setting in Function No 57 the timer will be reset It is recommended that after the settings for the automatic calibration have been completed manual calibration should be conducted once to verify whether the calibration is conducted properly 13 OTHER FUNCTIONS 13 1 13 OTHER FUNCTIONS 13 4 Checking the Temperature of the Constant Temperature Chamber Function No 30 The temperature C in the sensor unit can be checked in Function No 30 It is stable at 55 C after the instrument entered MEAS mode 13 2 Checking the Sensor EMF Function No 31 The sensor emf mV can be checked in Function No 31 When the instrument is in a warm up period the DATA display will show 13 3 Manual Operation of the Solenoid Valves for Automatic Calibration Function No 58 When wiring and piping for the solenoid valves for automatic calibration have
42. convenient reference Please read the information thoroughly before using the product The purpose of these user s manuals is not to warrant that the product is well suited to any par ticular purpose but rather to describe the functional details of the product No part of the user s manuals may be transferred or reproduced without prior written consent from YOKOGAWA e YOKOGAWA reserves the right to make improvements in the user s manuals and product at any time without notice or obligation f you have any questions or you find mistakes or omissions in the user s manuals please con tact our sales representative or your local distributor B Warning and Disclaimer The product is provided on an as is basis YOKOGAWA shall have neither liability nor responsibil ity to any person or entity with respect to any direct or indirect loss or damage arising from using the product or any defect of the product that YOKOGAWA can not predict in advance B Notes on Hardware Appearance and Accessories Check the following when you receive the product Appearance Standard accessories Contact our sales representative or your local distributor if the product s coating has come off it has been damaged or there is shortage of required accessories Model and Suffix Codes The name plate on the product contains the model and suffix codes Compare them with those in the general specification to make sure the product is the c
43. d as A non hazardous area is considered a place where no occurrence of explosive gas atmosphere is guaranteed by the foreperson and confirmed by a written document Therefore if a non hazardous area is secured the work can be done on site Precaution in Unpacking This analyzer is a precision instrument Beware of the effect of shock on the analyzer especially while unpacking and avoid dropping it or letting it hit another object IM 11P03A05 01E 1 2 1 NOTICE ON HANDLING 1 2 Check of Model Name and Specifications Check that the model number and main specifications on the name plate of the analyzer match the specifications of your purchase order Installation Site Sample Gas wi Class C Applicable Non 9 Mixed gases of 4 hazardous gas MG8 Hazardous or gt Range hazardous to 100 hydrogen excluding Area 2 Mixed gases of less 3 Area hydrogen than 4 hydrogen Atmosphere Sample gas Atmosphere Sample gas Atmosphere Sample gas MG8E used as 0 1 to 25 O flameproof Not applicable OK OK OK OK NA NA NA NA Exd II BT4X 4 for 21 25 Oz MG8E used as non flameproof MG8G used as non flameproof 0 1 to 25 O2 NA OK NA OK NA OK NA NA 0 5 to 25 O2 NA OK NA OK NA NA NA NA 1 Refer to the Users Guide to Installing Explosionproof Electrical Apparatus at Plants issued by the Technology Institution of Industrial Safety Japan 2 The definition of th
44. de in about 30 seconds This applies only when the instrument was in steady state before the power failure IM 11P03A05 01E 16 MEASUREMENT PRINCIPLE 16 1 16 MEASUREMENT PRINCIPLE 16 1 Measurement Principle A diagram of the principle is shown in figure 16 1 When the sample gas contains no oxygen molecules the right and left flow rates of the auxiliary gas N2 QL and Qr are equal or Qs QL If oxygen molecules are included in the gas flow rate Qu on the magnetic field generating side is less than Qn due to the force with which the magnetic field acts on the oxygen molecules establishing Qr gt Q The difference in the flow rate AQ Qr Q is proportional to the percentage of oxygen molecules in the measuring gas The thermister sensor is operated in the constant resistance circuit to convert the flow rates velocity into electric signals the difference of which is obtained by amplifier A as an oxygen signal ier Cu resistance O Ossignal posce M IN Sample gas inlet Va Qs flow signal R IN Auxiliary gas inlet VL Q flow signal OUT Gas outlet F Magnetic force acting on oxygen molecules Magnetic Field Thermistor Thermistor reied Figure 16 1 Measurement Principle IM 11P03A05 01E 16 2 16 MEASUREMENT PRINCIPLE 16 2 Principle of Interference gas Compensation Although measurements by the magnetic oxygen analyzer utilize the intense paramagnetic property of oxygen gase
45. during the calibration including the purge time The zero calibration time span calibration time and purge time can be set in Function Nos 52 53 and 54 respectively 1 2 3 N No IM 11P03A05 01E Switch to MAINT mode and enter the password Change the Function Number to 52 Set the zero calibration time using the SHIFT and INCR keys Press the EXEC key to accept In the same manner set the span calibration time in Function No 53 and the purge time in Function No 54 TE For semiautomatic calibration wiring and piping for automatic calibration are required to be made If the calibration start contact remains closed after calibration the instrument will not accept the next calibration start contact input The contact should be opened once and then closed again for the next calibration During MAINT mode the calibration start contact input signal is not accepted During manual calibration or automatic calibration the calibration start contact input signal is not accepted If the instrument is switched to MAINT mode by key operation while a semiautomatic calibration is being conducted the calibration will be aborted 12 CALIBRATION 12 5 12 3 3 Automatic Calibration Calibration can be automatically executed for preprogrammed calibration times at preprogrammed intervals For the automatic calibration the following should be set For the zero calibration time Function No 52 span
46. e non hazardous area is followed by the description in the Users Guide to Installing Explosionproof Electrical Apparatus at Plants issued by the Technology Institution of Industrial Safety Japan As a non hazardous area is considered a place where no occurrence of explosive gas atmospheres is guaranteed by the foreperson and confirmed by a written document 3 Acetylene carbon disulfide hydrogen and ethyl nitrate 4 Exd Il BT4X a Structure Flameproof b Scope of area Plants excluding hazardous areas in mining districts or hazardous areas in offices c Scope of sample gas or vapor c 1 Class A and B hazardous gases or vapor c 2 Gas or vapor with ignition temperature of 135 C or greater c 3 Hydrogen concentration must be below 4 Not applicable for gases containing acetylene carbon disulfide and ethyl nitrate d Operating conditions d 1 Before opening the cover remove power and make sure of non hazardous atmospheres d 2 Do not use for measuring oxygen concentration of gases other than those containing air or oxygen equivalent to or less than air or those mixed with flammable gas or vapor T1 1 ai IM 11P03A05 01E 2 OVERVIEW 2 1 2 2 1 OVERVIEW The model MG8E paramagnetic oxygen analyzer continuously and selectively measures the oxygen concentration in sample gases Its detector and converter are integrated together The analyzing cell in the detector has a special construction which is designed to be
47. e of the auxiliary gas was lower than the specified one Zeroorspan gas was not being supplied n manual calibration a zero calibration was conducted with span gas flowing or vice versa Remove the causes and reset the error status by performing zero and span calibration again If the calibration coefficient is outside the specification range due to a sensor drift or characteristics change with time initialize the calibration coefficients and perform zero and span calibration again When the error occurs during semiautomatic or automatic calibration remove the causes and reset the error status using the following procedure 1 Switch to MAINT mode and enter the password 2 Change the Function Number to 42 The DATA display shows rES 3 Press the EXEC key to reset the calibration coefficient error status IM 11P03A05 01E 15 TROUBLESHOOTING 15 5 15 2 Faulty Readings During Measurement This section describes faulty readings during measurement and possible causes 15 2 1 Fluctuations in Readings Check that the flow rate of the sample gas is the specified one and is stable Check the piping joints or connections in the line between the auxiliary gas cylinder and the analyzer for leaks Check that the temperature of the constant temperature chamber is stable Check the power supply voltage for fluctuations e Check that the analyzer is not exposed to direct sunlight or radiant heat from a heat so
48. ecalibrate the instrument coefficient alt emor automatic calibration or reset the error status in E 51 Span calibration coefficient is below Fail contact is Function No 42 0 9 or above 1 09 activated and FAIL lamp turns on MEAS lamp blinks Atmospheric Tum the power off and on compensation is Atmospheric Atmospheric sensor output exceeds again to restart E 60 disabled sensor error the normal range If error occurs again contact Yokogawa Service When a calibration coefficient error occurs during manual calibration the Fail lamp dose not turn on and the Fail contact is not activated IM 11P03A05 01E 15 TROUBLESHOOTING 15 3 15 1 2 Error Descriptions 15 1 2 1 Sensor Unit Errors E 10 E 11 A sensor unit error occurs when the sensor emf is outside the range of 50 mV to 400 mV Possible causes are 1 The pressure of the auxiliary gas dropped Check the auxiliary gas pressure 2 The flow rate of the sample gas was greater than the specified one Check the sample gas flow rate Remove the causes and then reset the error status using the following procedure 1 Switch to MAINT mode and enter the password 2 Change the Function Number to 41 The DATA display shows rES 3 Press the EXEC key to reset the sensor emf error status 15 1 2 2 Constant Temperature Chamber Errors E 20 E 21 The temperature of the constant temperature chamber of the MG8E is normally stable
49. eeeseeeeseneeseneesenees 15 5 16 MEASUREMENT PRINCIPLE ccccsseceessseeceeeesseeeeeeseeeeeeseseeeeeeeees 16 1 16 1 Measurement Principle isiaiccsicccsacecsceeatececatecassescacedecscecasasecnsndecaeecatevnesentascnexs 16 1 16 2 Principle of Interference gas Compensation 16 2 Customer Maintenance Parts List CMPL 11P03A01 01E A Rt i IM 11P03A05 01E 1 NOTICE ON HANDLING 1 1 1 1 1 NOTICE ON HANDLING It is highly recommended that you read this instruction manual carefully before using this analyzer so that the analyzer an operate in the best condition Instruments certified for their explosion protected construction flameproof instruments are provided with a certification label and nameplate which describes their required specifications All installation conditions should be provided in compliance with these specifications WARNING Open circuit at non hazardous location before removing the MG8E cover The nameplate of the MG8E says Open circuit at non hazardous location before removing cover because the internal energy does not decrease below the specified value According to USERS GUIDELINES for Electrical Installations for Explosive Gas Atmospheres in General Industry published by Tecnology Institution of Industrial Safety in Japan the expression a non hazardous area is define
50. eratures of the heater and in the sensor unit during warm up and stabilization periods Temperature Heater Temperature shown on DATA display Temperature in Sensor Unit i i i i I I I I I I 1 i I Time I I Closed Open Maintenance Status Contact Action i i 1 C O Warm up Period Stabilization Power Up p Period Steady State MAINT Lamp Blinking F10 1E ai Figure 10 1 Temperatures of the Heater and in the Sensor Unit During Warm up and Stabilization Periods IM 11P03A05 01E 10 START UP 10 3 10 3 Analog Output Loop Check A loop check is for checking wiring between the analog output terminals 3 and 4 of the instrument and the terminals of a higher level device 1 2 3 4 Ca Aa a Switch to MAINT mode and enter the password Change the Function Number to 16 Press the ZERO key to provide 4mA output from the output terminals Press the SPAN key to provide 20 mA output from the output terminals 10 4 Setting the Output Range The three ranges should be preset to range 1 2 and 3 respectively and one of the three ranges should be selected The following describes how to set each range and how to select a range 1 2 8 4 5 Switch to MAINT mode and enter the password Change the Function Number to 12 Set the upper range value for range 1 using the SHIFT and INCR keys Press the EXEC key to accept For example for the range of 0 to 25
51. etting high limit alarm 0 to 25 Oz O O 22 petting high low limitalarm 9 disabled 1 enabled O o Setting low auxiliary gas Ai 23 pressure alarm function 0 disabled 1 enabled O Checking temperature C 30 of constant temperature O O chamber 31 Checking sensor emf mV O O 40 _ Executing error check Resetting sensor emf error 41 status D Resetting calibration 42 coefficient error status ES 9 Setting output hold function 1 enabled output is held at last measured value 43 when error occurs 2 disabled 9 2 3 enabled output is held at preset value 44 Setting preset value 10 to 110 O O 45 Setting contact output 0 contact closes when error occurs O status when error occurs 1 contact opens when error occurs Setting initial wait time for 50 automatic calibration 0 day 0 hour to 99 days 24 hours O Setting interval for 51 automatic calibration 0 day 1 hour to 99 days 24 hours O 52 Setting zero calibration time 1 to 99 minutes O e 53 Setting span calibration time 1 to 99 minutes O O 54 Setting purge time 0 to 99 minutes O nom 0 not execute span calibration 55 Executing span calibration 1 executes span calibration O Setting the number of 56 times of skipping span 0 to 99 times O calibrations Starting automatic f 57 calibration function 0 OFF 1 ON o 9 58 Manual operations of ZERO key opens solenoid valve in zero gas line E o solenoid valves SPAN key
52. ge 3 Closed Closed Previous range IM 11P03A05 01E 11 6 11 PARAMETER SETTINGS 11 6 Setting the Range Switching Answerback Contact Output The range switching answerback function enables the currently selected range to be output by the contact output terminals 10 11 and 12 Since either the range switching answerback function or the high low limit alarm function can be assigned to this contact the range switching answerback function cannot be used when the high low limit alarm function is enabled 1 Switch to MAINT mode and enter the password 2 Change the Function Number to 22 3 Set to 0 to disable the high low limit alarm function using the SHIFT and INCR keys Press the EXEC key to accept Now the range switching answerback function is enabled The range answerback contact states and ranges are shown in Table 11 2 Table 11 2 Range Answerback Contact States and Ranges Terminal Number 40 12 R3 11 12 R2 Range Selected Open Open Range 1 Open Closed Range 2 Closed Open Range 3 N NOTE When the range answerback function is enabled the high low limit alarm function is disabled IM 11P03A05 01E 11 PARAMETER SETTINGS 11 7 11 7 Setting the Low Auxiliary Gas Pressure Alarm Function Auxiliary gas is used in accordance with the measurement principle of the instrument The pressure of the auxiliary gas is reduced to 180 kPa by a build in pressure regulator If
53. ial wait time has elapsed the first calibration starts Figure 12 2 shows the timing diagram when the number of times of skipping span calibrations Function No 56 is set to 2 E ir l Time Zero Calibration Span Calibration Initial Wait Time Calibration Interval Calibration Interval Calibration Interval 1 Zero Calibration i I k Span Calibration Time Output Hold Maintenance Status a Contact Action Automatic Calibration Function Starts F12 2E ai Figure 12 2 Timing Diagram for Automatic Calibration IM 11P03A05 01E 12 6 12 CALIBRATION The following describes how to set the automatic calibration For the settings of the zero calibration time span calibration time and purge time refer to Section 12 3 2 Semiautomatic Calibration N no IM 11P03A05 01E Switch to MAINT mode and enter the password Change the Function Number to 50 to set the initial wait time The DATA display shows xx xx The two left digits represent days 00 to 99 days and the two right digits time 00 to 24 hours Set the desired day and time using the SHIFT and INCR keys Press the EXEC key to accept Change the Function Number to 51 to set the calibration interval The DATA display shows xx xx The two left digits represent days 00 to 99 days and the two right digits time 00 to 24 hours Note that the minimum interval is one hour
54. ion 2 m s2 or less IM 11P03A05 01E 3 SPECIFICATIONS gt 3 3 Power Supply Power supply Voltage 100 to 115 V AC Rated voltage range 100 to 115 V AC Allowable voltage range 90 to 127 V AC Rated frequency 50 to 60 Hz Allowable frequency range 48 to 63 Hz Power Consumption 170 VA maximum approx 25 VA normally KC Marking Korea Electromagnetic Conformity Standard Materials in Contact with Gas JIS SUS316 stainless steel Fluorocarbon rubber Hard glass Structure flameproof Exd II BT4X Dimensions 440 W x 370 H x 325 D mm Color Door Munsell 2 0GY7 5 0 9 epoxy resin baked Case Munsell 2 0GY3 1 0 5 epoxy resin baked Weight Approx 38 kg IM 11P03A05 01E
55. mode esses 9 4 9 3 5 Entering Values red ei ec aaa 9 5 9 3 6 Selecting Data ic tiet eere aan 9 6 9 3 7 Functions Numbers sessesseseeeeeeeeeeneen mener 9 7 STARTUP m 10 1 10 1 SUPPLYING POWER 4 em 10 1 10 2 lc 10 2 10 3 Analog Output Loop Check cccseceeseceseseeeeeeeeseeeeseeeeseeeeseeeeseeeeseeeeeanenee 10 3 10 4 Setting the Output Range unnssnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnannnannnannnanen 10 3 10 5 Executing Calibrations cunc rnnt 40 10 4 10 5 1 Calibration Gas Requirements sese 10 4 10 5 2 X Setting Calibration Gas Concentrations sssesss 10 4 10 5 3 Manual Calibration u teet c te e da 10 4 10 6 Adjustment for Interference Gas Compensation Using Process Gas 10 5 PARAMETER SETTINGS nun ein 11 1 11 1 Output Hold ront a 11 1 11 1 1 Setting the Output Hold Function During Calibration 11 1 11 1 2 Setting the Output Hold Function When an Error Occurs 11 2 11 2 Setting the Fail Contact 11 3 11 3 Action of the Maintenance Status Contact eee 11 3 11 4 Setting the High Low Limit Alarms eee 11 4 11 5 Setting the Remote Range nuesnnssanennnnnnnnnnnnnnnnnnnnnnnnnnnnnannnnnnnannnannnannnannnanen 11
56. n including the purge time IM 11P03A05 01E 11 4 11 PARAMETER SETTINGS 11 4 Setting the High Low Limit Alarms The contact is activated to give an alarm when the measured oxygen concentration is outside the limit High and low alarm limit values can be set respectively When the measured value exceeds the high limit alarm value the H ALM lamp on the operation panel will turn on and the high limit alarm contact terminals 10 and 12 will close When the measured value falls below the low limit alarm value the L ALM lamp will turn on and low limit alarm contact terminals 11 and 12 will close The contacts are open when alarm is not generated and when the instrument is not powered The following describes how to set the limit values 1 2 3 4 5 Switch to MAINT mode and enter the password For the setting of the low limit alarm value change the Function Number to 20 and for the setting of the high limit alarm value change to 21 Set the desired value using the SHIFT INCR and DP keys Press the EXEC key to accept The setting range is 0 to 100 Oz Change the Function Number to 22 Set to 1 using the SHIFT and INCR keys and press the EXEC key to accept Now the high low limit alarm function is enabled When setting the high low limit alarms note that The alarm contact is activated when the measured value is equal to or higher than the high alarm setpoint or when the measured
57. n sensor unit error constant temperature chamber error analog error memory error or calibration coefficient error when automatic or semiautomatic calibration is enabled occurs Low auxiliary gas pressure alarm 1 point closed when pressure drops Factory default low limit pressure 300kPa Maintenance status 1 point closed during maintenance Range answerback or high low alarm 2 points normally deenergized open Range answerback or high low alarm contact output user selectable Output to Operate Solenoid Valve 3points Switching between zero and span calibration gas and measured gas Maximum load AC 1A Contact input Input specification Contact ON 2000 or less Contact OFF 100 kO or greater Remote range switching 2 points Output ranges 1 to 3 can be switched by external contact signal Calibration start 1 point calibration start command by external contact signal IM 11P03A05 01E 3 2 3 SPECIFICATIONS gt Measurement Gas Conditions Gas Flow Setting range 300 to 800 ml min standard 600 ml min Allowable range 10 of a set value Pressure Approx 7 kPa approx 700 mmH20 in Analyzer inlet Temperature 0 to 50 C Humidity No moisture condensation in the flow path or the sensor Operating Conditions Measurement gas must be an explosive gas which has T4 ignition temperature and must be a hazardous gas less than or equal to the gas vapor air mixtures Oxygen concentration in the measurement g
58. non hardening sealant Flameproof cable glands for cable wiring must be the ones specified by Yokogawa Flameproof cable glands are available in two types for different port sizes see table below Measure the outside diameter of a cable to be used in two different directions in millimeters and take the average From Table 7 1 select the cable gland with a diameter closest to the average Analog output cables must have a shield wire which should be connected to the FG terminal of the instrument For the grounding use 600 V PVC insulated wires Table 7 1 Types of Flameproof Packing Adapters and Appropriate Outside Diameters of Cable Conduit Connection Appropriate Outside Identification Size Diameters of Cable mm Mark on Packing Part Number 8 5 to 9 9 1 to 10 K9356AG 10 1 to 11 10 to 11 11 1 to 12 G9601AE 12 1 to 13 5 For conduit connection sizes see Section 3 4 External Dimensions IM 11P03A05 01E T7 1E ai 7 WIRING 7 3 7 4 External Wiring 7 4 4 Power Wiring and Grounding Connect a power line to terminals L 24 and N 25 of the instrument and a grounding wire to terminal FG 27 or the external grounding terminal at the bottom of the case The ground resistance should be 100 Q or less The jumper plate between terminals G 26 and FG 27 must remain connected 7 4 2 Analog Output Wiring Connect an analog output cable to the ANALOG OUTPUT terminals 3 and 4 and the
59. nstrument If the error occurs again contact Yokogawa Service 15 1 2 5 Memory Error E 40 A memory error occurs if there is a failure in reading or writing the memory device Turn the power off and on again to restart the instrument If the error occurs again contact Yokogawa Service IM 11P03A05 01E 15 4 15 TROUBLESHOOTING 15 1 2 6 Calibration Coefficient Errors E 50 E 51 A calibration coefficient error occurs if the calibration coefficient obtained in zero or span calibrations is outside the normal range A zero calibration coefficient error occurs if the zero calibration coefficient is outside of 1 25 Oz A span calibration coefficient error occurs if the span calibration coefficient is outside the rage of 0 9 to 1 09 For details refer to Chapter 12 Calibration Error notification and remedial actions are different when the error occurs during manual calibration and when it occurs during semiautomatic or automatic calibration When the error occurs during manual calibration the DATA display shows the error code but the FAIL lamp does not turn on and the Fail contact is not activated When the error occurs during semiautomatic or automatic calibration the DATA display shows no error code but the FAIL lamp turns on and the Fail contact is activated Possible causes are The calibration gas concentration set in the instrument does not agree with the actual concentration of the calibration gas used The pressur
60. ntact Input The range will be switched externally by the state of the contacts between 7 and 9 and between 8 and 9 For the setting and functions refer to Chapter 11 Parameter Settings Remote Range Contact Input Terminal No Range 1 Range 2 Range 3 7 9 Open Open Closed 8 9 Open Closed Open IM 11P03A05 01E 8 PREPARATIONS gt 8 1 8 PREPARATIONS 8 1 Adjustment of the Level in the Sensor Unit After the installation is complete adjust the angle of the sensor unit The level adjustment is not needed here if the adjustment is conducted using the actual process gas when the instrument has reached a steady state after power up 1 Remove the four screws and remove the constant temperature chamber cover 2 Turn the adjustment knob until the air bubble is centered in the level that is installed in front of the sensor unit Turn the knob clockwise to move the bubble to the right 3 Replace the constant temperature chamber cover Be sure that cables are not caught in the cover Make sure that the cover is installed securely Otherwise the temperature in the constant temperature chamber may become unstable causing measurement errors Screws Holding Constant Temperature Chamber Cover 4 Sensor Angle Adjustment Knob F8 1E ai Figure 8 1 Level Adjustment IM 11P03A05 01E 8 2 8 PREPARATIONS gt 8 2 Checking the Auxiliary Gas Pressure Suppl
61. oncentration The display may show the minus sign The instrument determines the value even if the measured concentration is below zero The measured concentration when zero gas is applied may be a negative value 3 Press the ZERO key Turn off the sample gas flow and apply the zero gas at the specified flow rate in the sample gas line When solenoid valves for automatic calibration are installed pressing the ZERO key closes the solenoid valve in sample gas line and opens the solenoid valve in zero gas line 4 The oxygen concentration on the DATA display changes When the reading has stabilized completely press the EXEC key The instrument is now calibrated to the value as the zero point 5 Press the SPAN key Turn off the zero gas flow and apply the span gas at the specified flow rate When solenoid valves for automatic calibration are installed pressing the SPAN key closes the solenoid valve in zero gas line and opens the solenoid valve in span gas line 6 The oxygen concentration on the DATA display changes When the reading has stabilized completely press the EXEC key The instrument is now calibrated to the value as the span point 7 Turn offthe span gas flow Apply the sample gas and switch to MEAS mode IM 11P03A05 01E 12 4 12 CALIBRATION 12 3 2 Semiautomatic Calibration In the semiautomatic calibration zero and span calibrations are carried out under the preprogrammed conditions using the calibration start c
62. ontact input terminals 5 and 6 The instrument will start calibration when the dry voltage free contact connected to the input is closed For the semiautomatic calibration the following should be set Zero calibration time Function No 52 The amount of time for zero gas to flow The timer starts when the solenoid valve in zero gas line opens to allow the zero gas to flow through the sensor unit Set the amount of time it takes for the reading to stabilize sufficiently The setting range is from 1 to 99 minutes Span calibration time Function No 53 The amount of time for span gas to flow The timer starts when the solenoid valve in zero gas line closes and the solenoid valve in span gas line opens to allow the span gas to flow through the sensor unit Set the amount of time it takes for the span gas to purge the zero gas in the sensor and for the reading to stabilize sufficiently The setting range is from 1 to 99 minutes Purge time Function No 54 The amount of time for sample gas to flow through the sensor unit to purge calibration gas after calibration Set the amount of time it takes for the sample gas to purge the sensor unit completely The setting range is from 0 to 99 minutes The purge time is valid for manual calibration When the output hold function during calibration is set to enabled the analog output will be held during the calibration including the purge time Also the maintenance status contact will be closed
63. orrect one If you have any questions contact our sales representative or your local distributor IM 11P03A05 01E INTRODUCTION iii B Symbol Marks Throughout this user s manual you will find several different types of symbols are used to identify dif ferent sections of text This section describes these icons NWARNING Indicates a potentially hazardous situation which if not avoided could result in death or serious injury A CAUTION Indicates a potentially hazardous situation which if not avoided may result in minor or moderate injury It may also be used to alert against unsafe practices A IMPORTANT Indicates that operating the hardware or software in this manner may damage it or lead to system failure AN NOTE Draws attention to information essential for understanding the operation and features TIP Identifies additional information ALSO Identifies a source to be referred to Clicking a reference displayed in green can call up its source while clicking a reference dis played in black cannot IM 11P03A05 01E iv INTRODUCTION After sales Warranty B Do not modify the product B During the warranty period for repair under warranty carry or send the prod uct to the local sales representative or service office Yokogawa will replace or repair any damaged parts and return the product to you Before returning a product for repair under warranty provide us with the model
64. ow ratio due to gas susceptibility cancels out the flow ratio change due to the density difference the interference error can be compensated The model MG8 magnetic oxygen analyzer is shipped after adjusting the cell inclination in the final adjustment stage using the magnetic characteristics and density of the measuring gas of the user In this case the inclination is stored using a built in level containing a bubble in a glass tube When this analyzer is installed at the user s site turning the rotary knob so that the bubble of this level returns to the center reproduces the adjustment when shipped Measurement gas inlet Stream B Stream A Magnetic field Auxiliary gas inlet Thermistor Gas outlet F16 2E ai Figure 16 2 Top of Cell IM 11P03A05 01E 16 MEASUREMENT PRINCIPLE 16 3 Stream B Stream A Thermistor Inclination Auxiliary gas F16 3E ai Figure 16 3 Cross Section of Cell e How to adjust the sensor angle If necessary for example if the composition of the process gas has changed the sensor angle should be adjusted using the procedure described in Section 10 6 Adjustment for Interference Gas Compensation Using Process Gas On the MG8E analyzer the sensor angle can be adjusted externally without compromising the explosionproof integrity of the enclosure i e the sensor angle can be adjusted using the adjustment screw on the case door without opening the case However the adjustment scre
65. rameter Settings The contact is open when the instrument is not powered 7 4 4 3 Wiring for Fail Contact Output The contact between terminals 15 and 16 will be activated when an error occurs The output contact is user configurable to open or close when an error occurs For the setting and functions refer to Chapter 11 Parameter Settings The contact is open when the instrument is not powered 7 4 4 4 Wiring for Low Auxiliary Gas Pressure Alarm Contact Output The contact between terminals 17 and 18 will close when the pressure of the auxiliary gas being supplied to the instrument drops to the specified pressure or below For its functions refer to Chapter 11 Parameter Settings The contact is open when the instrument is not powered IM 11P03A05 01E 7 6 7 WIRING 7 4 5 Contact Input Wiring The input is designed to accept a voltage free contact The contact will open or close in response to the resistance detected on the input Note that the resistance includes wiring resistance Contact closes at 200 O or less Contact opens at 100 kO or more Automatic calibration Remote range Ground Output signal contact input contact input FG ANALOG OUTPUT s INPUT 4 20mA DC CAL START ps m Figure 7 5 Contact Input Wiring 7 4 5 1 Wiring for Calibration Start Contact Input A calibration will start when the contact between terminals 5 and 6 closes For the setting and functions refer to Chapter 12 Calibration 7 4 5 2 Wiring for Remote Range Co
66. rameters are set and confirmed or calibration is performed When the instrument moves into steady state after a warm up period it is in MEAS mode The instrument can be switched into MAINT mode from a warm up period stabilization period or steady state MEAS mode Key Operation FUNC DATA Procedure Press EXEC key while holding MEAS os EEE E MAINT key MAINT and INHIBIT lamps turn on Maintenance status contact is activated 9 3 2 Entering the Password A password is required when setting data or performing calibration in MAINT mode A password for the instrument is O07 which cannot be changed The following describes how to enter the password Key Operation FUNC DATA Procedure Ut PUDUU Press FUNC keys to show 00 on FUNC display DATA display shows P000 where the password is entered UU PUDU Press SHIFT key repeatedly to move the blinking digit to the rightmost digit UU PUL Press INCR key repeatedly until 7 is displayed BU PUB Press EXEC key to accept The digit stops blinking ENABLE lamp turns on indicating that the password has become effective IM 11P03A05 01E 9 4 9 OPERATIONS 9 3 3 Changing the Function Number Each function is assigned to the Function Numbers Parameters can be viewed and set in the relevant Function Number The Function Number can be changed using the FUNC keys when the instrument is in
67. re condensation in the flow path or the sensor Operating Conditions Measurement gas must be an explosive gas which has T4 ignition temperature and must be a hazardous gas less than or equal to the gas vapor air mixtures Oxygen concentration in the measurement gas must be less than a mixture of air with a flammable gas Exd II BT4X However this is an exception if it is ascertained that the gas explosion characteristics are safer than the equivalent gas Auxiliary Gas Type N2 gas not containing O2 gas equal to or greater than 0 1 of the maximum concentration of the measurement range Pressure 350 to 500 kPa average flow rate of approx 35 ml min When sample gas contains hydrogen of 3 or greater flow rate is approx 55 ml min Calibration gas Zero gas N2 gas Note Zero gas should not contain Oz gas with a concentration equal to or greater than 0 1 of the upper range value Span gas Dry air instrument air Oz 20 95 vol or standard gas containing Oe gas with a concentration of 80 to 100 of the span value balance nitrogen Calibration methods 1 Automatic calibration at set intervals by internal timer 2 Semiautomatic calibration started by external contact input 3 Manual calibration in the field Warm up Time Approx 2 5 hours Installation Conditions Ambient temperature 5 to 50 C Humidity 10 95 RH No condensing Vibration 5to9Hz Vibration amplitude 1 5 mm or less 9 to 150 Hz Accelerat
68. s in error E 11 Sensor emf continues to fall below Function No 41 50 mV for at least 10 seconds Su In stabilization period or steady state E 20 heater temperature continues to fall below 50 C for at least 10 seconds Turn off power to Constant In stabilization period or steady state heater Remove the causes Turn N ons d E 21 heater temperature continues to the power off and on again a exceed 60 C for atleast 10 seconds to restart eor p 22 n warm up period heater If error occurs again temperature fails to rise Error code blinks on contact Yokogawa Service In warm up period heater DATA display Turn off E 23 temperature continues to exceed power to heater 65 C for at least 10 seconds E 30 Failure occurs in A D converter on Turn off power to circuit heater Turn the power off and on in to restart Analog error E 31 again mu E 32 Voltage of sensor unit exceeds input If error occurs again ES range of A D converter contact Yokogawa Service Turn the power off and on Memory E 40 Failure occurs in memory device on Turn off power to again to restart error circuit heater If error occurs again contact Yokogawa Service Zero calibration coefficient is outside In manual calibration error code appears FAIL lamp does not turn on and Fail contact is not activated E 50 of 1 25 O on DATA display Remove the causes Calibration n In semiautomatic or R
69. s other than oxygen also have a slight paramagnetic property Hence a small indication error occurs due to their magnetic susceptibilities for various process gases This error may become a problem at low concentration ranges The model MG8 magnetic oxygen analyzer cancels this error caused by paramagnetism of the process gas by utilizing the difference in density between the measuring and reference gases The error is compensated by changing the cell angle inclination The measuring gas stream is divided into stream A and stream B as shown in Figure 16 2 The auxiliary gas normally nitrogen gas is introduced from the center of the cell and its stream is divided into the right and left Since a magnetic field exists at only the one auxiliary gas outlet if there is a gas other than nitrogen having a different magnetic susceptibility then an error occurs because it affects the auxiliary gas flow ratio of the two streams The analyzer compensates for this interference by changing the cell angle For example if carbon dioxide which has a smaller susceptibility than nitrogen is passed through the cell the indication deflects to a negative value If the cell is tilted angled to compensate the indication as shown in Figure 16 3 a counterforce acts to supply more auxiliary gas into path A due to the higher density of carbon dioxide thus changing the flow ratio of the auxiliary gas By changing the cell angle so that the change in the auxiliary gas fl
70. shield wire to the FG terminal 1 or 2 of the instrument The load resistance including wiring resistance on the output should be 550 Q or less Automatic calibration Remote range Ground Output signal contact input contact input FG ANALOG OUTPUT HA INPUT 4 20mA DC CAL START Saas eee C Receiver Recorder F7 2E ai Figure 7 2 Analog Output Wiring IM 11P03A05 01E 7 4 7 WIRING 7 4 3 Wiring for Solenoid Valves for Automatic Calibration This wiring is for the solenoid valves that switch zero span and sample gas lines in automatic or semiautomatic calibration The power sources for solenoid valves are provided internally Use solenoid valves that have the same power supply voltage and frequency specifications as the instrument Use a normally open solenoid valve in sample gas line and normally closed solenoid valves for zero and span gas lines Automatic calibration solenoid valve drive signal Power supply AC FG SV POWER OUTPUT POWER SUPPLY AUTO CAL ZERO A SPAN A SMPL yy COM L N G FG Solenoid Valve in Zero Gas Line Normally Closed Solenoid Valve in Sample Gas Line Normally Open Solenoid Valve in Span Gas Line Normally Closed F7 3E ai Figure 7 3 Solenoid Valve Wiring A IMPORTANT The power sources for solenoid valves are provided internally Use solenoid valves that have the same power supply voltage and frequency specifications as the instrument 7 4 A Contact Output Wiring
71. ssure gauge range 0 to 1MPa should be provided on the auxiliary gas line to set the desired pressure For pressure setting see 3 of Section 8 2 Setting the Auxiliary Gas Pressure 3 Calibration gases are required for zero and span calibrations Piping should be arranged to enable the inlet to switch between the sample gas and the calibration gas 4 Gas from the instrument should be vented to the atmosphere The gas outlet should be designed so that the ingress of wind rain and drain is prevented Gas outlet must be vented to the atmosphere Model MG8E 3 Analog output gt Contact output Zero gas Contact input Flow rate Span gas gt 300 to 800ml min Pressure Provide a pressure of about 7 kPa Power supply Sample gas 350 to 500kPa Auxiliary gas F6 1E ai Pressure gauge Pressure regulator Figure 6 1 Piping Diagram IM 11P03A05 01E 7 WIRING 7 1 T WIRING NWARNING 7 1 Open circuit at non hazardous location before removing the MG8E cover The nameplate of the MG8E says Open circuit at non hazardous location before removing cover because the internal energy does not decrease below the specified value According to USERS GUIDELINES for Electrical Installations for Explosive Gas Atmospheres in General Industry published by Tecnology Institution of Industrial Safety in Japan the expression a non h
72. the supply pressure drops below 180 kPa the auxiliary gas flow will reduce interfering with accurate measurement If the pressure drops below approximately 300 kPa when the low auxiliary gas pressure alarm function is enabled the DATA display will blink and the low auxiliary gas pressure contact terminals 17 and 18 will close The auxiliary gas cylinder should be replaced after the alarm occurs and before the pressure drops to approximately 180 kPa The contact is open when the instrument is not powered 1 Switch to MAINT mode and enter the password 2 Change the Function Number to 23 3 Setto 1 using the SHIFT and INCR keys Press the EXEC key to accept Now the low auxiliary gas pressure alarm function is enabled A IMPORTANT The secondary pressure of the build in pressure regulator varies with the instrument there are variations from 180 kPa Check the reading on the auxiliary gas pressure gauge when the gas is supplied at the specified pressure in advance IM 11P03A05 01E 12 CALIBRATION 12 1 12 CALIBRATION 12 1 Overview The instrument should be calibrated at two points using zero gas nitrogen gas with an oxygen concentration of 096 and span gas with a known oxygen concentration Figure 12 1 shows the relationship between the sensor emf and the oxygen concentration Sensor emf mV oxygen concentration of span gas zero calibration coefficient sensor emf at the initial zero calibration
73. tion Yokogawa Electric will not bear responsibility when the user configures the product into systems or resells the product Maintenance service and supplying repair parts will be covered for five years after the production ends For repair for this product please contact the near est sales office described in this instruction manual IM 11P03A05 01E lt CONTENTS gt V Model MG8E Paramagnetic Oxgen Analyzer IM 11P03A05 01E 3rd Edition CONTENTS INTRODUCTION ea i e After sales Warn ne nurun nnnnn annnm anann nnana nnnn annann ana iv 1 NOTICE ON HANDLING cocinan a 1 1 1 1 Precaution in Unpacking eres nnne nnn nnn nnne nns 1 1 1 2 Check of Model Name and Specifications eeseeesssss 1 2 2 OVERVIEW e AR 2 1 2 1 Standard System Configuration eene 2 1 2 2 System Configuration with Automatic Calibration 2 2 3 SPECIFICATIONS 3 1 3 1 Standard Specifications eroe Nin 3 1 3 2 Cliaracteristics a 3 4 3 3 Model and Suffix Code lt lt lt lt m lt im iii 3 5 3 4 SAA Ae 3 6 4 INSTALLATION mmc die 4 1 4 1 Installation Location ctr E e xl ink ERE ERO S EARS CIR E 4 1 4 2 Mounting Procedure smc 4 2 5 NAMES OF COMPONENTS 2222444442000000000000nnnnn0nnnnnnnn
74. trial Safety in Japan the expression a non hazardous area is defined as A non hazardous area is considered a place where no occurrence of explosive gas atmosphere is guaranteed by the foreperson and confirmed by a written document Therefore if a non hazardous area is secured the work can be done on site IM 11P03A05 01E 152 15 TROUBLESHOOTING 15 1 Errors and Remedies 15 1 1 Checking the Error Code An error will occur if a failure is detected in the sensor constant temperature chamber or analyzer s internal circuit When an error occurs the FAIL lamp turns on and the Fail contact is activated As for the calibration coefficient error the FAIL lamp turns on and the Fail contact is activated only when semiautomatic or automatic calibration function is enabled To check an error code follow the procedure below 1 2 displayed 3 Switch to MAINT mode and enter the password If no error is being generated the DATA display shows oooo Change the Function Number to 40 Press the EXEC key The current error code will be The types of errors detected by the self diagnostic function and remedies are summarized in Table 15 1 Table 15 1 Errors and Remedies Error Type Code Description Action Remedy 0000 No error is being generated E 10 Sensor emf continues to exceed R th d Sensor unit 400 mV for atleast 10 seconds MOVE ME CAUSES dn reset the error statu
75. ts you can visit Yokogawa s home page at the following web site Home page http www yokogawa com W Written by Environmental amp Analytical Products PMK Group IA Div Product Business Center Yokogawa Electric Corporation W Published by Yokogawa Electric Corporation 2 9 32 Nakacho Musashino shi Tokyo 180 8750 JAPAN W Printed by KOHOKU PUBLISHING amp PRINTING INC IM 11P03A05 01E User s Model MG8E Supplement Manual Paramagnetic Oxygen Analyzer E SSE ee Thank you for selecting our MG8E Paramagnetic Oxygen Analyzer In User s Manual IM 11P03A05 01E 3rd Edition supplied with the product some revisons additions have been made Please replace the corresponding pages in your copy with attached revised pages Note Revisions P 3 2 Section 3 1 Standard Specifications Installation Conditions Changed of ambient tem perature P 3 3 Section 3 1 Standard Specifications Power Supply Description changes Section 3 1 Standard Specifications Addition of KC Marking All Rights Reserved Copyright 1994 2nd Edition Apr 2013 YK YOKOGAWA Subject to change without notice IM 11 P03A05 01 E 3rd Edition Yokogawa Electric Corporatior 3 2 3 SPECIFICATIONS Measurement Gas Conditions Gas Flow Setting range 300 to 800 ml min standard 600 ml min Allowable range 10 of a set value Pressure Approx 7 kPa approx 700 mmH20 in Analyzer inlet Temperature 0 to 50 C Humidity No moistu
76. urce such as a furnace 15 2 2 Drift in Readings Check that the supply pressure of the auxiliary gas is appropriate If the auxiliary gas pressure falls below the specified supply pressure the output will drift as the pressure drops 15 2 3 Short Term Shift in Readings Check that the flow rate of the sample gas is the specified one and is stable If the flow of the sample gas containing oxygen is turned off the reading will shift toward 0 Oz 15 3 When Calibration Cannot Be Executed Check that the password has been entered correctly and that the ENABLE lamp is lit Check that the instrument is in steady state If the MAINT lamp blinks in MEAS mode the instrument is in a stabilization period and calibration cannot be executed Check that the calibration gas concentrations are set properly 15 4 Inthe Event of Power Failure 15 4 1 Instantaneous Power Failure The instrument will not be affected and will continue to work if the duration of a power failure is 80 ms or shorter Even if the duration of a power failure is the above mentioned time or less the instrument may be restarted if the power failure occurs during the warm up period because of the amount of time that the heater is turned on 15 4 2 When the Power Returns If the temperature of the constant temperature chamber remains at 50 C or higher when the power returns from a relatively short term a few minutes power failure the instrument will returns to MEAS mo
77. value is equal to or less than the low alarm setpoint The alarm contact does not operate if the high limit alarm value has been set equal to or lower than the low limit alarm value JUN NOTE Either the high low limit alarm function or the range switching answerback function can be assigned to this contact When the high low limit alarm function is set to enabled in Function No 22 the output range answerback function is disabled IM 11P03A05 01E 11 PARAMETER SETTINGS 11 5 11 5 Setting the Remote Range The remote range function enables the preprogrammed three ranges to be switched remotely by the range switching contact input terminals 7 8 and 9 When the remote range function is enabled the RMT RANGE lamp is lit the range selected in Function No 11 is invalid and the range selected externally is used The following describes how to set the remote range function 1 Switch to MAINT mode and enter the password 2 Change the Function Number to 10 3 Setto 2 using the SHIFT and INCR keys Press the EXEC key to accept Now the remote range function is enabled The remote range contact states and ranges are shown in Table 11 1 When two contacts terminals 7 9 and 8 9 are closed the previously set range remains Table 11 1 Remote Range Contact States and Ranges Terminal Number 7 9 R3 8 9 R2 Range Selected Open Open Range 1 Open Closed Range 2 Closed Open Ran
78. w is not provided if the instrument has a measuring range of 0 596 O by the Model and Suffix Codes In this case make sure that the installation site meets the requirements for nonhazardous areas Then open the door of the explosionproof enclosure and adjust the sensor angle IM 11P03A05 01E Customer MG8G Maintenance MG8E Parts List Paramagnetic Oxygen Analyzer External connection terminal Item Parts No Oty Description 1 A1111EF 2 Fuse YOKOG AWA lt gt Copyright Dec 1994 YK 2nd Edition Sep 1996 YK CMPL 11P03A01 01E Yokogawa Electric Corporation Revision Information e Title Model MG8E Paramagnetic Oxygen Analyzer User s Manual Manual No IM 11P03A05 01E Jan 2009 3rd Edition Style Change S3 and Doc No change to 11P03A05 01E from 11P3A5 01E May 2008 2nd Edition Revised and Corrected over all IM Format and Style renewal As a result of changing Data Source from paper to electric files and of applying Indesign software Outline of change Chapter Introduction is newly added Chapter 1 Description with WARNING p1 1 and Table p1 2 are added Chapter 3 Rearrangement of sections and subsections Subsection 3 1 1 Some specifications are changed or added e g Contact Output analog output signal Installation conditions color Subsection 3 1 2 Expression of each characteristic is changed Section 3 2 Model and Suffix code is added Chapter 4 Auxiliary gas pressure
79. w while the operation is suspended 3 Before restarting the operation check the sample gas line for moisture due to condensation If moisture is present remove the sample gas line from the instrument and allow instrument air to flow to purge the pipe completely Moisture in the sensor unit may result in a failure and in the worst case the instrument will need to be serviced at the factory IM 11P03A05 01E 14 INSPECTION AND MAINTENANCE 14 3 14 4 Fuse Replacement Two fuses are installed for live and neutral respectively in the power unit in the instrument If the fuse blows replace it using the following procedure 1 Before replacement turn off power to the instrument 2 Open the instrument cover Pull the fuse out from the fuse holder which is located near the power switch as shown in Figure 14 1 Turn the cap counterclockwise until it stops using a flat head screwdriver of the appropriate size Pull out the cap together with the fuse 3 Make sure that a new fuse is of the same rating Attach the new fuse to the cap and insert it into the holder Turn the cap clockwise while pushing it until it stops using the flat head screwdriver Fuse specifications Maximum rated voltage 250 V Maximum rated current 2 0A Type Time lag Standards compliance UL CSA VDE Part number A1111EF The fuse deteriorates with time It is recommended that the fuses be replaced every two years even if the fuse has not blown A
80. y the auxiliary gas at the specified pressure 350 to 00 kPa to the instrument Check that the needle on the pressure gauge that is installed in the instrument is in the center of the green zone The pressure gauge measures the secondary pressure of the pressure regulator that is installed in the instrument to stabilize the auxiliary gas pressure The pressure regulator is adjusted at the factory before shipment and needs no adjustment 8 3 Checking Sample Gas Do not introduce sample gas before the instrument has reached a steady state IM 11P03A05 01E 9 OPERATIONS 9 1 9 9 1 OPERATIONS Operation Keys The operation keys on the panel are shown in Figure 9 1 and their functions are summarized in Table 9 1 O OlO O MEAS MAINT D P SHIFT AINCR EXEC O F9 1E ai Figure 9 1 Operation Keys Table 9 1 Operation Keys and Their Functions Key Function MEAS MAINT Hold this key and press EXEC key to switch measurement MEAS mode and maintenance MAINT mode SPAN Used to execute span calibration in calibration Used to enter span gas concentration in setting Used to execute zero calibration in calibration Used to enter zero gas concentration ZERO in setting A FUNC A Used to change the Function Number Each press increases the number by one increment The ten and ones digits change independently D P Used to move the decimal point in setting gt SHIFT Used to blink digit on DAT
81. ygen concentration to the sensor emf k obtained when zero and span calibrations are performed and the initial calibration value and is expressed as the ratio to the ratio obtained at the initial calibration k 3 Span calibration coefficient E Where k theratio of the oxygen concentration to the sensor emf obtained at the initial calibration k the ratio of the oxygen concentration to the sensor emf obtained in calibration When the span calibration coefficient is outside the range of 0 9 to 1 09 a span calibration coefficient error will occur 12 2 3 Checking the Calibration Coefficients 1 Switch to MAINT mode There is no need to enter the password 2 Change the Function Number to 03 3 Press the ZERO key to check the zero calibration coefficient and press the SPAN key to check the span calibration coefficient 12 2 4 Initializing the Calibration Coefficients By initializing the calibration coefficients the zero calibration coefficient is reset to O and the span calibration coefficient to 1 Based on the sensor emf obtained in the next calibration after the initialization the calibration coefficients will be calculated The calibration after the initialization should be performed with special care 1 Switch to MAINT mode and enter the password 2 Change the Function Number to 05 The DATA display shows rES 3 Press the EXEC key to initialize the calibration coefficients JUN

Model MG8E Paramagnetic Oxygen Analyzer

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