Teledyne M300EM operation manual Maintenance Schedule & Procedures, Troubleshooting & Repair

Table of Contents	Teledyne API – Technical Manual - Model 300E Family CO Analyzers
11.5.4.1. Overview		242
11.5.4.2. Signal Synchronization and Demodulation		243
11.5.4.3. Sync/Demod Status LED’s		244
11.5.4.4. Photo-Detector Temperature Control		244
11.5.4.5. Dark Calibration Switch		244
11.5.4.6. Electric Test Switch		245
11.5.5. Relay Board		245
11.5.5.1. Heater Control		245
11.5.5.2. GFC Wheel Motor Control:		245
11.5.5.3. Zero/Span Valve Options		245
11.5.5.4. IR Source		245
11.5.5.5. Status LED’s		246
11.5.5.6. I2C Watch Dog Circuitry		246
11.5.6. MotherBoard		247
11.5.6.1. A to D Conversion		247
11.5.6.2. Sensor Inputs		247
11.5.6.3. Thermistor Interface		247
11.5.6.4. Analog Outputs		248
11.5.6.5. Internal Digital I/O		248
11.5.6.6. External Digital I/O		248
11.5.7. I2C Data Bus		249
11.5.8. Power Supply/ Circuit Breaker		249
11.5.9. Communication Interface		251
11.5.10. Front Panel Interface		252
11.5.10.1. Analyzer Status LED’s		252
11.5.10.2. Keyboard		252
11.5.10.3. Display		253
11.5.10.4. Keyboard/Display Interface Electronics		253
11.5.11. Software Operation		256
11.5.12. Adaptive Filter		256
11.5.13. Calibration - Slope and Offset		257
11.5.14. Measurement Algorithm		257
11.5.15. Temperature and Pressure Compensation		257
11.5.16. Internal Data Acquisition System (iDAS)		257
12. MAINTENANCE SCHEDULE & PROCEDURES		259
12.1. Maintenance Schedule		259
12.2. Predicting Failures Using the Test Functions		263
12.3. Maintenance Procedures		264
12.3.1. Replacing the Sample Particulate Filter		264
12.3.2. Rebuilding the Sample Pump		264
12.3.3. Performing Leak Checks		265
12.3.3.1. Vacuum Leak Check and Pump Check		265
12.3.3.2. Pressure Leak Check		265
12.3.4. Performing a Sample Flow Check		266
12.3.5. Cleaning the Optical Bench		266
12.3.6. Cleaning Exterior Surfaces of the M300E/EM		266
13. TROUBLESHOOTING & REPAIR		267
13.1. General Troubleshooting		267
13.1.1. Fault Diagnosis with WARNING Messages		268
13.1.2. Fault Diagnosis with TEST Functions		270
13.1.3. DIAG  SIGNAL I/O: Using the Diagnostic Signal I/O Function		273
13.1.4. Internal Electronic Status LED’s		274
13.1.4.1. CPU Status Indicator		274
13.1.4.2. Sync Demodulator Status LED’s		275
13.1.4.3. Relay Board Status LED’s		276
13.2. Gas Flow Problems		278
13.2.1. M300E/EM Internal Gas Flow Diagrams		278

xiv 04288D DCN5752