Teledyne 100AH 10.3.8 PMT Cooler

Teledyne API Model 100AH SO2 Analyzer Instruction Manual, 02417, Rev. D

10.3.8 PMT Cooler

The PMT cooler uses a Thermal Electric Cooler (TEC) supplied with DC current from the

switching power supply in the Power Supply Module. An overall view is shown in Figure 10-8.

The temperature is controlled by a temperature controller circuit located on the Preamp board.

Voltages applied to the cooler element vary from 0.1 to 12 VDC. The input voltage from the

supply is 15 VDC and LED indicates the presence of the voltage. Typical control voltage to the

FET is about 4.5 VDC when PMT temperature is at the 7°C setpoint. At normal room

temperatures the 7°C set point should be maintained within 0.1°C. These voltages can be

measured from the PCB mounted in the fan shroud. The control voltage from the Preamp can be

measured between TP18 and TP11 of the Preamp PCB. Also under normal room temperature

and at the 7°C PMT set point the voltage between TP1 and TP2 will typically measure between

0.15 V - 0.2 V which translates to about 1.5-2 Amp DC current flowing through the Thermal

Electric Cooler (TEC). Following procedures show how to replace the TEC assembly.

1. Remove three screws that hold the sensor assembly (Refer to Figure 2-1. They are located

adjacent to the shipping screws).

2. Remove four screws that hold the fan duct and unplug cable plugs from the fan duct

assembly.

3. Remove four screws holding the heatsink assembly from the PMT housing assembly and

separate these two assembly carefully by pulling heatsink assembly slowly out of the PMT

housing until HVPS module is completely out of the PMT housing (refer to Figure 10-8).

4. Remove two screws from the HVPS module to separate HVPS module from the cooler

block.

5. Pull out PMT, LED, and thermistor carefully from the cooler block. Be careful not to

contaminate the window of the PMT with thermal compound from the thermistor. The PMT

is fragile, so handle carefully.

6. Replace two desiccant bags inside of the PMT housing with new bags.

7. Replace cooler assembly (P/N 01461) and assemble by reversing the above steps.

10-50

Contents

Main INSTRUCTION MANUAL MODEL 100AH SULFUR DIOXIDE ANALYZER HIGH LEVEL SAFETY MESSAGES TABLE OF CONTENTS 3 SPECIFICATIONS, AGENCY APPROVALS, WARRANTY ........................3-1 4 THE M100AH SO2 ANALYZER ................................................................... 4-1 6 OPTIONAL HARDWARE AND SOFTWARE............................................... 6-1 8 CALIBRATION AND ZERO/SPAN CHECKS ..............................................8-1 10 DIAGNOSTIC, TROUBLESHOOTING..................................................... 10-1 11 M100AH SPARE PARTS LIST ................................................................ 11-1 LIST OF FIGURES Teledyne API Model 100AH SO2 Analyzer Instruction Manual, 02417, Rev. D LIST OF TABLES viii Page Page 1 HOW TO USE THIS MANUAL Page 2 GETTING STARTED 2.1 Installation 2.2 Electrical and Pneumatic Connections Page Page Page Page 2.3 Initial Operation Page Step 3 - Review the quality of the calibration: Calibration Quality Check Procedure Step 4 - The M100AH is now ready to measure sample gas. 2-9 Page Page 2-12 PROM # Serial # Date Technician 2-13 Page Teledyne API Model 100AH SO2 Analyzer Instruction Manual, 02417, Rev. D 3 SPECIFICATIONS, AGENCY APPROVALS, WARRANTY 3-1 3.1 Specifications 3.2 Warranty Page Page 4 THE M100AH SO2 ANALYZER 4.1 Principle of Operation ()() [] Page 4.2 Instrument Description 4.2.1 Sensor Module, Reaction Cell, Detector 4.2.2 Pneumatic Sensor Board 4.2.3 Computer Hardware and Software 4.2.4 V/F Board 4.2.5 Front Panel 4-5 Page 4.2.6 Power Supply Module 4.2.7 Pneumatic System 4.3 I/O Hardware Interface 4.3.1 RS-232 Interface Page Page 4.3.2 Status Output Interface Page 4.3.3 Contact Closure Control Input Interface Page 5 SOFTWARE FEATURES 5.1 Index To Front Panel Menus Page Teledyne API Model 100AH SO2 Analyzer Instruction Manual, 02417, Rev. D 5.1.1 Sample Menu 5-3 Table 5-1: M100AH Sample Menu Structure Teledyne API Model 100AH SO2 Analyzer Instruction Manual, 02417, Rev. D 5.1.2 Set-Up Menu 5-4 Table 5-2: M100AH Setup Menu Structure 5-5 5-6 5.2 Sample Mode 5.2.1 Test Functions 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 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 5.3.8 Communications Menu 5.3.9 Variables Menu (VARS) Page 6 OPTIONAL HARDWARE AND SOFTWARE 6.1 Rack Mount Options 6.2 Zero/Span Valves 6.3 Autocal - Setup Zero/Span Valves Page Page Page 6.4 4-20 mA, Isolated Current Loop Output 7 RS-232 INTERFACE 7.1 Setting Up the RS-232 Interface 7.1.1 Setup from the Front Panel 7.1.2 Security Feature 7.1.3 Protocol of Port Communication 7.1.4 Entering Commands in Terminal Mode 7.2 Command Summary 7-6 Page Teledyne API Model 100AH SO2 Analyzer Instruction Manual, 02417, Rev. D 7.3 TEST Commands and Messages 7-8 Table 7-7: RS-232 Test Messages 7.4 WARNING Commands and Messages Page 7.5 CALIBRATION Commands and Messages Page 7.6 DIAGNOSTIC Commands and Messages 7.7 DAS Commands and Reports Page 7.8 VARIABLES Commands and Messages Page Page Teledyne API Model 100AH SO2 Analyzer Instruction Manual, 02417, Rev. D 8 CALIBRATION AND ZERO/SPAN CHECKS 8-1 Page 8.1 Manual Zero/Span Check or Calibration Through the Sample Port Page 8.2 Manual Zero/Span Check or Calibration with Zero/Span Valves Option 8.3 Automatic Zero/Span Check 8.4 Dynamic Zero/Span Calibration 8.5 Use of Zero/Span Valves with Remote Contact Closure 8.6 Special Calibration Requirements for Dual Range or Auto Range 8.7 Calibration Quality 8.8 Calibration Gases Page 9 MAINTENANCE 9.1 Maintenance Schedule 9.2 Replacing the Sample Particulate Filter Page 9.3 Replacing the Pump Scrubber 9.4 Cleaning Orifice and Orifice Filter 9.5 Cleaning the Reaction Cell 9.6 Pneumatic Line Inspection Page Page 9.7 Leak Check Procedure 9.8 Light Leak Check Procedure 9.9 EPROM Replacement Procedure 10 DIAGNOSTIC, TROUBLESHOOTING Page 10.1 Operation Verification - M100AH Diagnostic Techniques 10.1.1 Fault Diagnosis with TEST Variables (table continued) 10-4 (table continued) 10-5 (table continued) 10-6 (table continued) 10-7 10-8 10.1.2 Fault Diagnosis with WARNING Messages 10-10 10.1.3 Fault Diagnosis using DIAGNOSTIC Mode 10-12 (table continued) 10-13 (table continued) 10-14 (table continued) 10-15 Page Page 10.1.4 M100AH Internal Variables 10-19 10.1.5 Test Channel Analog Output 10.1.6 Factory Calibration Procedure (Quick Cal) Page 10.2 Performance Problems 10.2.1 AC Power Check 10.2.2 Flow Check 10.2.3 No Response to Sample Gas 10.2.4 Negative Concentration Display 10.2.5 Excessive Noise 10.2.6 Unstable Span 10.2.7 Unstable Zero 10.2.8 Inability to Span 10.2.9 Inability to Zero 10.2.10 Non-Linear Response 10.2.11 Slow Response 10.2.12 Analog Output Doesn't Agree with Display Concentration 10.3 Electronic Subsystem Troubleshooting and Adjustments 10.3.1 Computer, Display, Keyboard Page Page Page 10.3.2 Voltage/Frequency (V/F) Board Page Page Page Page 10.3.3 Status/Temp Board Page Page Teledyne API Model 100AH SO2 Analyzer Instruction Manual, 02417, Rev. D 10.3.4 Power Supply Module 10-41 Page Page Page 10.3.5 Flow/Pressure Sensor Page Page Page 10.3.6 Reaction Cell Temp 10.3.7 Preamp Board 10.3.8 PMT Cooler Page 10.3.9 HVPS (High Voltage Power Supply) Page 10.4 Optical Sensor Module Troubleshooting 10.4.1 PMT 10.4.2 UV Lamp Adjust or Replacement Page 10.5 Pneumatic System Troubleshooting 10.5.1 Leak Check 10.5.2 Pump 10.5.3 Z/S Valves 11 M100AH SPARE PARTS LIST 11-2 11.1 Model 100AH Level 1 Spares Kit Page Teledyne API Model 100AH SO2 Analyzer Instruction Manual, 02417, Rev. D APPENDIX A MAINTENANCE SCHEDULE FOR M100AH A-1 Page Teledyne API Model 100AH SO2 Analyzer Instruction Manual, 02417, Rev. D APPENDIX B ELECTRICAL SCHEMATICS B-1