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Teledyne API –Operation Manual - Model 300E Family CO Analyzers Table of Contents
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13.2.2. Typical Sample Gas Flow Problems................................................................................................. 282
13.2.2.1. Flow is Zero ............................................................................................................................... 282
13.2.2.2. Low Flow ................................................................................................................................... 282
13.2.2.3. High Flow................................................................................................................................... 282
13.2.2.4. Displayed Flow = “Warnings” .................................................................................................... 283
13.2.2.5. Actual Flow Does Not Match Displayed Flow ........................................................................... 283
13.2.2.6. Sample Pump............................................................................................................................ 283
13.3. Calibration Problems................................................................................................................................ 283
13.3.1. Miscalibrated..................................................................................................................................... 283
13.3.2. Non-Repeatable Zero and Span....................................................................................................... 284
13.3.3. Inability to Span – No SPAN Key...................................................................................................... 284
13.3.4. Inability to Zero – No ZERO Key ...................................................................................................... 284
13.4. Other Performance Problems .................................................................................................................. 285
13.4.1. Temperature Problems ..................................................................................................................... 285
13.4.1.1. Box or Sample Temperature ..................................................................................................... 285
13.4.1.2. Bench Temperature................................................................................................................... 285
13.4.1.3. GFC Wheel Temperature .......................................................................................................... 286
13.4.1.4. IR Photo-Detector TEC Temperature........................................................................................ 286
13.4.2. Excessive Noise................................................................................................................................ 287
13.5. Subsystem Checkout ............................................................................................................................... 288
13.5.1. AC Mains Configuration.................................................................................................................... 288
13.5.2. DC Power Supply.............................................................................................................................. 288
13.5.3. I
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C Bus .............................................................................................................................................. 289
13.5.4. Keyboard/Display Interface............................................................................................................... 289
13.5.5. Relay Board ...................................................................................................................................... 290
13.5.6. Sensor Assembly .............................................................................................................................. 291
13.5.6.1. Sync/Demodulator Assembly .................................................................................................... 291
13.5.6.2. Electrical Test............................................................................................................................ 291
13.5.6.3. Opto Pickup Assembly .............................................................................................................. 292
13.5.6.4. GFC Wheel Drive ...................................................................................................................... 292
13.5.6.5. IR Source................................................................................................................................... 292
13.5.6.6. Pressure/Flow Sensor Assembly .............................................................................................. 293
13.5.7. Motherboard...................................................................................................................................... 294
13.5.7.1. A/D Functions............................................................................................................................ 294
13.5.7.2. Test Channel / Analog Outputs Voltage.................................................................................... 294
13.5.7.3. Analog Outputs: Current Loop................................................................................................... 295
13.5.7.4. Status Outputs........................................................................................................................... 296
13.5.7.5. Control Inputs – Remote Zero, Span......................................................................................... 297
13.5.8. CPU................................................................................................................................................... 297
13.5.9. RS-232 Communications.................................................................................................................. 297
13.5.9.1. General RS-232 Troubleshooting.............................................................................................. 297
13.5.9.2. Troubleshooting Analyzer/Modem or Terminal Operation ........................................................ 298
13.5.10. The Optional CO
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Sensor ............................................................................................................... 298
13.6. Repair Procedures ................................................................................................................................... 299
13.6.1. Repairing Sample Flow Control Assembly ....................................................................................... 299
13.6.2. Removing/Replacing the GFC Wheel............................................................................................... 300
13.6.3. Checking and Adjusting the Sync/Demodulator, Circuit Gain (CO MEAS) ..................................... 302
13.6.3.1. Checking the Sync/Demodulator Circuit Gain........................................................................... 302
13.6.3.2. Adjusting the Sync/Demodulator, Circuit Gain .......................................................................... 303
13.6.4. Disk-On-Module Replacement Procedure........................................................................................ 304
13.7. Technical Assistance ............................................................................................................................... 304
14. A PRIMER ON ELECTRO-STATIC DISCHARGE......................................................... 305
14.1. How Static Charges are Created ............................................................................................................. 305
14.2. How Electro-Static Charges Cause Damage........................................................................................... 306
14.3. Common Myths About ESD Damage ...................................................................................................... 307
14.4. Basic Principles of Static Control ............................................................................................................. 307
14.4.1. General Rules ................................................................................................................................... 307
14.4.2. Basic anti-ESD Procedures for Analyzer Repair and Maintenance ................................................. 309
04288D DCN5752