Teledyne Model 300EU manual Theory Of Operation, Measurement Method, Auto-Reference Ratio, M300EU

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10.THEORY OF OPERATION

M300EU	THEORY OF OPERATION
(Addendum to M300EU Manual - P/N 04145)

10.THEORY OF OPERATION

10.1. MEASUREMENT METHOD

The information found in Section 10.1 of the M300E/EM Operators Manual (P/N 04288) is applicable to the M300EU with the following addition. It is recommended that you read that section before continuing.

10.1.1. AUTO-REFERENCE RATIO

The higher resolution of the M300EU makes it more susceptible then the M300E/EM to the effects of a variety of environmental conditions such as:

•Drift related to the age of the optical bench components ( e.g. the IR lamp, the IR detector, etc.)

•Variations in the temperature of the sample gas (affecting it density).

•Interferents, specifically CO2 and H2O.

The M300EU accounts for these issues by adding an additional component to the CO concentration calculation call the Auto-reference ratio.

This ratio is arrived at in the same manner as the measure/reference ratio (described in Section 10.1.3.2 of the M300E/EM Operators Manual) with the difference that that during the measurements that are to calculate the A- REF ratio, the gas stream is switched to pass through a scrubber that completely removes all CO from the sample gas. Therefore the measured difference between CO MEAS and CO REF represents the exact state of the sample gas and the optical bench’s sensors without CO present.

Figure 10-1: M300EU Gas flow during Auto-Reference Measurements

The analyzer averages the last five A-REFratios and multiplies this average by a constant and the result is included in the final CO calculation as a positive or negative offset.

Whenever an A-REFis manually initiated either by using the AREF submenu via the front panel (see Section 6.4.2) or by activating pin-7 of the instrument’s digital control input connector, all previously stored A-REF ratios are erased and the new ratio inserted. This allows the user to correct for a bad A-REF reading (e.g. the oven temperature during the A-REF cycle was too high/low)

05514 Rev A1

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Contents MODEL 300EU CO ANALYZER WITH AUTO-REFERENCE ADDENDUM TO M300E/EM MANUAL P/NTELEDYNE INSTRUMENTS ADVANCED POLLUTION INSTRUMENTATION DIVISION TAPI 9480 CARROLL PARK DRIVE SAN DIEGO, CALIFORNIA USAPage USER NOTES SAFETY MESSAGESM300EU GENERAL SAFETY HAZARDAddendum to M300E/EM Manual P/N TABLE OF CONTENTS LIST OF TABLES LIST OF FIGURESAPPENDIX A-4 Model 300EU Signal I/O Definitions, Revision K.6 LIST OF APPENDICESM300EU 1.1. REFERENCE NUMBERING CONVENTION 1. INTRODUCTION1.2. M300EU OVERVIEW any time the instrument is in SETUP modeM300EU 2.1. SPECIFICATIONS 2. SPECIFICATIONS, APPROVALS AND WARRANTYM300EU Basic Unit Specifications 05514 Rev A12.2. EPA EQUIVALENCY DESIGNATION 2.4. WARRANTY2.3. CE MARK COMPLIANCE 05831 Rev3.1. UNPACKING THE M300EU 3. GETTING STARTED3.2. M300EU ANALYZER LAYOUT OPTICAL BENCH3.3. ELECTRICAL CONNECTIONS 3.3.1. POWER CONNECTIONM300EU Figure 3-2 M300EU Internal Gas Flow3.3.2. ANALOG OUTPUT Connections Analog Output Data Type Default SettingsFigure 3-3 M300EU Analog Output Connector Analog Output Pin Outs 3.3.3. CONNECTING THE STATUS OUTPUTSTable 3-3 Status Output Pin Assignments Output #3.4.1. STARTUP AND WARM UP OF THE M300EU 3.4. INITIAL OPERATION OF THE M300EU3.4.2. WARNING MESSAGES MESSAGEThe Test functions available from the front panel of the M300EU are 3.4.3. FUNCTIONAL CHECK3.5. INITIAL CALIBRATION 3.5.2. BASIC CO CALIBRATION SETUP3.5.1. PRE-CALIBRATION STABILIZATION 3.5.2.1. Calibration GasesSTEP 1 - SET LIMITS 3.5.3. BASIC CO CALIBRATION PROCEDURESTEP 2 - DILUTION RATIO STEP 3 - SET CO SPAN GAS CONCENTRATION4. FREQENTLY ASKED QUESTIONS & GLOSSARY M300EU OPTION 5. OPTIONAL HARDWARE AND SOFTWAREDESCRIPTION 300E5.1.1. ZERO SPAN VALVES OPT 50A 5.1. CALIBRATION VALVE OPTIONS FOR THE M300EUTOLL-FREE FAX TEL E-MAIL api-sales@teledyne.com M300EU Internal Pneumatic Flow- Zero/Span Valves OPT 50A5.1.2. ZERO SPAN VALVES WITH IZS OPT 51B SAMPLE CHAMBERScrubber 5.1.3. Zero Span Valves with IZS and Shutoff VALVE OPT 51B 6. M300EU OPERATING INSTRUCTIONS M300EU Operating Modes 6.2. OPERATING MODESsample gas stream is being routed through the CO scrubber of the auto reference gas pathSETUP 6.2.1. AUTO-REFERENCE MODE AREFMode Field AUTO-REF RANGE = 50.000 PPMUnits 6.2.2. TEST FUNCTIONSTable 6-2 Test Functions Defined Parameter6.3.1. PHYSICAL RANGE VERSUS ANALOG OUTPUT REPORTING RANGES 6.3. SETUP Æ RNGE ANALOG OUTPUT REPORTING RANGE CONFIGURATION6.3.2. ANALOG OUTPUT RANGES FOR CO CONCENTRATION ANALOG OUTSNGL DEFAULT SETTINGSDUAL AUTOThis is the default reporting range mode for the analyzer To set the ranges press following keystroke sequence M300EU OPERATING INSTRUCTIONS weight/volume units CO ppb x 1.25 = CO ug/m3 CO ppm x 1.25= CO mg/m3 6.3.6. SETUP Æ RNGE Æ UNIT SETTING THE REPORTING RANGE UNIT TYPEPressure STP Consult your local regulations for the STP used by your agency6.4.1. ADJUSTING THE A-REF MODE CYCLE TIME To manually start an auto-reference measurement cycle, press 6.4.2. FORCING AN AUTO-REFERENCE MEASUREMENT05514 Rev A1 Table 6-3 Test Functions Defined 6.5. SETUP Æ MORE Æ VARS INTERNAL VARIABLES VARSVARIABLE DESCRIPTIONDIAG I/O 6.6. SETUP Æ MORE Æ DIAG USING THE DIAGNOSTICS FUNCTIONSDIAG AOUT DIAG AIO6.7.1. ANALOG I/O CONFIGURATION 6.7. ANALOG OUTPUT CONFIGURATIONTHE ANALOG I/O CONFIGURATION SUBMENU DIAG - Analog I/O Functions4. Choose a Test Channel parameter to be output on the channel TURNING THE ANALOG OUTPUT OVER-RANGE FEATURE ON/OFF ANALOG OUTPUT SIGNAL TYPE AND RANGE SELECTION6.13.5.7 SETTING THE REPORTING RANGE SCALE FOR AN ANALOG OUTPUT 6.13.5.8 SETTING DATA UPDATE RATE FOR AN ANALOG OUTPUTMANUAL CALIBRATION OF ANALOG OUTPUT CONFIGURED FOR VOLTAGE RANGES 6.7.2. CALIBRATION OF THE ANALOG OUTPUTSENABLING OR DISABLING THE AUTO-CAL FOR AN INDIVIDUAL ANALOG OUTPUT AUTOMATIC ANALOG OUTPUT CALIBRATIONTest Channels Functions Available on the M300EU’s Analog Output 6.7.3. SELECTING A TEST CHANNEL FUNCTION FOR OUTPUT A4TEST CHANNEL ZEROTable 6-7 M300EU Hessen GAS ID List 6.7.4. HESSEN PROTOCOLDefault Hessen Status Bit Assignments manual for troubleshooting tips MANUAL CALIBRATION 7. CALIBRATION PROCEDURESREQUIRED EQUIPMENT, SUPPLIES AND EXPENDABLES STEP3 - ZERO/SPAN CALIBRATION7.9.2 CO2 SENSOR CALIBRATION PROCEDURE 7.9.1 SECTION O2 SENSOR CALIBRATION PROCEDUREMANUAL CALIBRATION WITH ZERO/SPAN VALVES MANUAL CALIBRATION CHECKS WITH ZERO/SPAN VALVES8. EPA PROTOCOL CALIBRATION M300EU 9.1. PERFOMING AN AUTO-REFERENCE MEASUREMENT AFTER MAINTENANCE 9. INSTRUMENT MAINTENANCEM300EU STABILITY Table 9-1 M300EU Test Function RecordCO MEAS MR RATIOM300EU 10.1. MEASUREMENT METHOD 10. THEORY OF OPERATION10.1.1. AUTO-REFERENCE RATIO Figure 10-1 M300EU Gas flow during Auto-Reference Measurements10.2.1. THE A-REF CARBON MONOXIDE SCRUBBER 10.2. PNEUMATIC OPERATIONFigure 10-2 Auto-Reference Measurement Cycle This includes calibration gases such as zero air and span gas10.2.3. THE NAFION→ DRYER 10.2.2. THE A-REF VALVE ASSEMBLYAuto-Reference Valve Operating States Figure 10-3 Semi-Permeable Membrane Drying ProcessThe dryer consists of a bundle of 0.030 O.D. Nafion→ tubes housed within a single large tube shell. Sample gas flows within the Nafion tubes while water vapor absorbs into the tubular membrane walls and is removed. Moisture permeating the tubing is carried away by a dry purge gas within the shell that flows countercurrent to the sample gas 10.3.1. OVERVIEW 10.3. ELECTRONIC OPERATIONFigure 10-4 M300EU Electronic Overview Block Diagram Aout10.3.2. THE RELAY PCA 10.3.2.1. Temperature Control of the Convection OvenFigure 10-5 M300EU Heating Control Block Diagram 115 VAC Configuration 10.3.2.2. Oven Heaters AC Power Configuration230 VAC Configuration Figure 10-6 M300EU Oven Heater Configuration Jumpers10.3.2.3. Status LED’s 10.3.3. MOTHERBOARD10.3.3.1. A to D Conversion 10.3.3.2. Sensor Inputs10.3.4. POWER DISTRIBUTION RELAY PCAFigure 10-8 M300EU Distribution Block Diagram Page 11.1. GENERAL NOTES 11. TROUBLESHOOTING & REPAIRMAINTENANCE PERSONNEL ONLY PROCEDURES11.2. FAULT DIAGNOSIS WITH WARNING MESSAGES Warning Messages - Indicated FailuresTable continued on next page Sample flow rate is Warning Messages - Indicated Failures contTable 11-2 Test Functions - Indicated Failures 11.2.1. FAULT DIAGNOSIS WITH TEST FUNCTIONStable continued INDICATED FAILURESValues outside range indicate Test Functions - Indicated FailuresFaulty Connectors/Wiring 11.2.2. RELAY BOARD STATUS LED’STable 11-3 Relay Board Status LED Failure Indications Voltage displayed should change. If not11.3. GAS FLOW PROBLEMS 11.4. OTHER PERFORMANCE PROBLEMS11.4.1. Unexplained DRIFT 11.5.1. RELAY BOARD 11.5. SUBSYSTEM CHECHOUT11.5.2. MOTHERBOARD 11.5.2.1. A/D Functions11.6. TECHNICAL ASSISTANCE M300EU APPENDIX A-2 M300EU Setup Variables Available Via Serial I/O APPENDIX A - Version Specific Software DocumentationAPPENDIX A-4 M300EU Signal I/O Definitions M300EU Addendum to M300E/EM ManualCLR1 TEST1MSG1 Figure A-2 Primary Setup Menu Except iDAS Figure A-3 Primary Setup Menu Æ iDAS Submenu Figure A-4 Secondary Setup Menu Æ COMM and VARS Submenus Figure A-5 Secondary Setup Menu Æ Hessen Protocol Submenu Auto Cal feature is OFF or the range is set for ENTER PASSWORDFigure A-6 DIAG Menu Press ENTRAPPENDIX A-2 Setup Variables For Serial I/O, Revision K.6 APPENDIX A-2 Setup Variables For Serial I/O, Revision K.6Table continues CO2FILTPCT A-10 O2FILTPCTSTDO2CELLTEMP NAME APPENDIX A-3 Warnings and Test Functions, Revision K.6MESSAGE TEXT A-11A-12 Table A-5These gases not applicable to the M300EU These gases not applicable to the M300EUBit or Channel Signal NameDescription NumberAPPENDIX A-5 M300EU iDAS Parameters Revision K.6 OVTMPW Internal box temperature #2/oven warningA-14 CO2OFS A-15O2SLPE O2OFSTA-16 APPENDIX A-6 Terminal Command Designators, Revision K.6APPENDIX B - M300EU SPARE PARTS & EXPENDABLES APPENDIX B - M300EU SPARE PARTS & EXPENDABLESEuropean standard EN 05925 Rev AM300EU Addendum to M300E/EM Manual