Teledyne 200AH 9.3.8. NOX Sensor Module

Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2

9-58

9.3.8. NOX Sensor Module

Figure 9-9 and Figure 9-10 show the assembly of the NOX sensor module.

9.3.8.1. PMT

The PMT detects the light emitted by the reaction of NO with ozone. It has a gain of about

500,000 to 1,000,000. Because of its high sensitivity to light, it is not possible to test the detector

outside of the instrument in the field. The best way to determine if the PMT is working is by

using Optic test. OT operation is described in Section 9.1.3.3.

The basic method to diagnose a PMT fault is to eliminate the other components using ET, OT

and specific tests for other sub-assemblies.

9.3.8.2. Reaction Cell Temperature

The reaction cell temperature is controlled by the CPU. It operates by reading a thermistor

amplifier on the Status/Temp board. The CPU controls the temperature by toggling a bit on the

V/F board. The V/F board TTL logic controls a solid state switch on the Switch Board in the

PSM. The switched 115 VAC comes out of the PSM to a connector near the underside of the

reaction cell. A warning message may be present during initial warm-up due to the temperature

being below the 50C setpoint.

9.3.8.3. Preamp Board

The NOx Preamp Board is a multifunction board providing circuitry to support the following

functions.

1. Preamp, buffer amplifier, physical range control hardware for the PMT detector.

2. Precision voltage reference and voltage generation, and control for the PMT - HVPS inside

the sensor module.

3. Constant current generator and adjustment for the Optic Test LED.

4. Voltage generation and adjustment for Electric Test.

5. Thermistor amplifier, control signal generation for the PMT cooler.

The setup and adjustment of items 1-4 above is covered in the Factory Calibration procedure in

Section 9.1.6. Item 5 has no adjustable features.

Contents

Main INSTRUCTION MANUAL MODEL 200AH NITROGEN OXIDES ANALYZER Page SAFETY MESSAGES Page Table of Contents 3. SPECIFICATIONS, WARRANTY.................................................................. 3-1 4. THE M200AH NOX ANALYZER................................................................... 4-1 6. OPTIONAL HARDWARE AND SOFTWARE................................................ 6-1 7. CALIBRATION AND ZERO/SPAN CHECKS ...............................................7-1 9. TROUBLESHOOTING AND ADJUSTMENTS.............................................. 9-1 Page Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 vii LIST OF FIGURES Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 viii LIST OF TABLES Page Page 1. HOW TO USE THIS MANUAL Page 2. GETTING STARTED 2.1. Unpacking 2.2. Electrical and Pneumatic Connections Page Page Page Page Page 2.3. Initial Operation Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 2-8 Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 2-9 Step 2 - Calibrate the instrument for NOX: Zero/Span Calibration Procedure Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 2-10 Zero/Span Calibration Procedure (Continued) Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 2-11 Step 3 - Review Quality of calibration: Calibration Quality Check Procedure Step 4 - The M200AH is now ready to measure sample gas. Page Page Page Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 2-15 Table 2-1: Final Test and Calibration Values (table continued) Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 2-16 Table 2-1: Final Test and Calibration Values (Continued) Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 3-1 3. SPECIFICATIONS, WARRANTY 3.1. Specifications NOX Specifications O2 Option 3.2. Warranty 4. THE M200AH NOX ANALYZER 4.1. Principle of Operation 4.1.1. NOX Measurement hv NO * NO 4.1.2. Oxygen Measurement (Option) Page Page 4.2. Operation Summary 4.2.1. NOX Sensor Module, Reaction Cell, Detector 4.2.2. Oxygen Sensor Module (Option) 4.2.3. Pneumatic Sensor Board 4.2.4. Computer Hardware and Software 4.2.5. V/F Board 4.2.6. Front Panel 4.2.7. Power Supply Module 4.2.8. Pump, Valves, Pneumatic System Page Page 4.2.9. Ozone Generator 4.2.10. NO2 - NO Converter Page 5. SOFTWARE FEATURES 5.1. Index to Front Panel Menus Page Page Page Page Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 5-6 5.1.1. Sample Menu Table 5-1: M200AH Sample Menu Structure Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 5-7 5.1.2. Set-Up Menu Table 5-2: M200AH Setup Menu Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 5-8 Table 5-2: M200AH Setup Menu (Continued) Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 5-9 Table 5-3: M200AH Setup Menu Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 5-10 Table 5-4: M200AH Setup Menu 5.2. Sample Mode 5.2.1. Test Functions Page Page Page 5.2.2. CAL, CALS, CALZ, Calibration Functions Page 5.3. Set-Up Mode 5.3.1. Configuration Information (CFG) 5.3.2. Automatic Calibration (AutoCal) 5.3.3. Data Acquisition System (DAS) Page 5.3.4. Range Menu Page Page 5.3.5. Password Enable 5.3.6. Time of Day Clock 5.3.7. Diagnostic Mode Page 5.4. M200AH Operating Modes 5.4.1. NO/NOx/NO2 Switching Mode 5.4.2. NOX Only Mode 5.4.3. NO Only Mode 5.5. 4-20 mA Current Loop 5.6. Status Output 5.7. RS-232 Interface 5.7.1. Setting up the RS-232 Interface Page Page 5.7.2. Command Summary Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 5-32 Table 5-12: RS-232 Command Summary Page Page Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 5-35 5.7.3. TEST Commands and Messages Table 5-15: RS-232 Test Messages 5.7.4. WARNING Commands and Messages 5.7.5. CALIBRATION Commands and Messages 5.7.6. DIAGNOSTIC Commands and Messages 5.7.7. DAS Commands and Messages Page 5.7.8. VARIABLES Commands and Messages Page 6. OPTIONAL HARDWARE AND SOFTWARE 6.1. Rack Mount Options 6.2. Zero/Span Valves Option Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 6-3 6.2.1. Autocal - Setup Zero/Span Valves Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 6-4 Table 6-3: Action of MODE Field in AutoCal 6.3. Oxygen Sensor Option 6.4. Isolated 4-20 mA Current Loop Option 6.5. Molybdenum Converter Option 6.6. External Desiccant Canister Option 6.7. Alternate Bypass Flow Orifice Option 6.8. M501 External Converter Option Page 7. CALIBRATION AND ZERO/SPAN CHECKS Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 7-2 Table 7-1: Types of Zero/Span Check and Calibration 7.1. Manual NOX Zero/Span Check or Cal With Zero/Span Gas in the Sample Port Page Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 7-5 Table 7-4: Manual Span Calibration Procedure - Span Gas Thru Sample Port 7.2. Manual O2 Zero/Span Check or Cal With Zero/Span Gas in the Sample Port 7.3. Manual Zero/Span Check with Zero/Span Valves Option Page 7.4. Dynamic Zero/Span Calibration Using AutoCal 7.5. Use of Zero/Span Valves with Remote Contact Closure 7.6. NO Only Mode Calibration 7.7. NOX Only Mode Calibration 7.8. Calibration Requirements for AutoRange or Remote Range 7.9. Calibration Requirements for Independent Range 7.10. Calibration Quality 7.11. Converter Efficiency Compensation 7.12. Recommendations for CEM Applications 7.12.1. Calibration Gasses 7.12.2. Calibration Frequency 7.12.3. Converter Efficiency Page 8. MAINTENANCE 8.1. Maintenance Schedule 8.2. Replacing the Sample Particulate Filter Page 8.3. Replacing the Converter Page 8.4. Cleaning the Reaction Cell Page Page 8.5. Pneumatic Line Inspection Page Page Page 8.6. Leak Check Procedure 8.7. Light Leak Check Procedure 8.8. Prom Replacement Procedure 9. TROUBLESHOOTING AND ADJUSTMENTS 9.1. Operation Verification - Diagnostic Techniques 9.1.1. Fault Diagnosis with TEST Variables Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 9-3 Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 9-4 Table 9-1: Test Functions (Continued) Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 9-5 Table 9-1: Test Functions (Continued) Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 9-6 Table 9-1: Test Functions (Continued) Test Function Factory Set-Up Comment Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 9-7 Table 9-1: Test Functions (Continued) Test Function Factory Set-Up Comment 9.1.2. Fault Diagnosis with WARNING Messages Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 9-9 Table 9-2: Front Panel Warning Messages 9.1.3. Fault Diagnosis using DIAGNOSTIC Mode Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 9-11 Table 9-3: Summary of Diagnostic Modes Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 9-12 9.1.3.1. Signal I/O Diagnostics Table 9-4: Diagnostic Mode - Signal I/O Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 9-13 Table 9-4: Diagnostic Mode - Signal I/O (Continued) Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 9-14 Table 9-4: Diagnostic Mode - Signal I/O (Continued) Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 9-15 Table 9-4: Diagnostic Mode - Signal I/O (Continued) Page 9.1.4. M200AH Internal Variables Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 9-18 Table 9-5: Model 200AH Variables Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 9-19 9.1.5. Test Channel Analog Output 9.1.6. Factory Calibration Procedure Page Page Page 9.2. Performance Problems 9.2.1. AC Power Check 9.2.2. Flow Check 9.2.3. No Response to Sample Gas 9.2.4. Negative Output 9.2.5. Excessive Noise 9.2.6. Unstable Span 9.2.7. Unstable Zero 9.2.8. Inability to Span 9.2.9. Inability to Zero 9.2.10. Non-Linear Response 9.2.11. Slow Response 9.2.12. Analog Output Doesn't Agree With Display Concentration 9.3. Subsystem Troubleshooting and Adjustments 9.3.1. Computer, Display, Keyboard Page Page 9.3.2. RS-232 Communications Page Page 9.3.3. Voltage/Frequency (V/F) Board Page Page Page Page Page 9.3.4. Status/Temp Board Page 9.3.5. Power Supply Module Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 9-46 Table 9-9: Power Supply Module Subassemblies Page Page 9.3.6. Ozone Generator Page Page Page 9.3.7. Flow/Pressure Sensor Page Page Page Page 9.3.8. NOX Sensor Module Page Page Page Page 9.3.9. Z/S Valves 9.3.10. Pneumatic System Teledyne API Model 200AH NOX Analyzer Instruction Manual, 06492, Rev. G2 A-1 APPENDIX A ELECTRICAL SCHEMATICS Table A-1: Electrical Schematics Page APPENDIX B SPARE PARTS AND EXPENDABLES Page Page SPARE PARTS LIST LEVEL 1 SPARES KIT (WITH MINI-HICON CONVERTER) LEVEL 1 SPARES KIT (WITH MOLYBDENUM CONVERTER)