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TABLE OF CONTENTS Teledyne API – T101 Operation Manual
xii
7.5. Dynamic Multipoint Span Calibration ...................................................................................... 195
7.6. Special Calibration Requirements for Independent Range or Auto Range...................................... 196
7.7. References ......................................................................................................................... 196
8. INSTRUMENT MAINTENANCE ................................................................................................... 197
8.1. Maintenance Schedule.......................................................................................................... 197
8.2. Predictive Diagnostics .......................................................................................................... 201
8.3. Maintenance Procedures....................................................................................................... 202
8.3.1. Changing the Sample Particulate Filter ............................................................................. 202
8.3.2. Changing the IZS Permeation Tube.................................................................................. 203
8.3.3. Maintaining the SO
2
Scrubber ......................................................................................... 203
8.3.3.1. Predicting When the SO
2
Scrubber Should Be Replaced. ............................................... 203
8.3.3.2. Checking the Function of the SO
2
Scrubber................................................................. 204
8.3.3.3. Changing the SO
2
Scrubber Material.......................................................................... 204
8.3.4. Changing the External Zero Air Scrubber .......................................................................... 205
8.3.5. Maintaining the H
2
S SO
2
Converter .............................................................................. 206
8.3.5.1. Predicting When the Converter Catalyst Should Be Replaced. ........................................ 206
8.3.5.2. Checking the Efficiency of the H
2
S SO
2
Converter..................................................... 206
8.3.5.3. Changing the H
2
S SO
2
Converter Catalyst Material ................................................... 207
8.3.6. Checking for Light Leaks ................................................................................................ 209
8.3.7. Changing the Critical Flow Orifice .................................................................................... 209
9. TROUBLESHOOTING & SERVICE............................................................................................... 211
9.1. General Troubleshooting....................................................................................................... 211
9.1.1. Fault Diagnosis with Warning Messages............................................................................ 212
9.1.2. Fault Diagnosis with Test Functions.................................................................................. 216
9.1.3. Using the Diagnostic Signal I/O Function .......................................................................... 217
9.1.4. Status LEDs ................................................................................................................. 218
9.1.4.1. Motherboard Status Indicator (Watchdog) .................................................................. 219
9.1.4.2. CPU Status Indicator ...............................................................................................219
9.1.4.3. Relay Board Status LEDs.......................................................................................... 219
9.2. Gas Flow Problems .............................................................................................................. 220
9.2.1. Zero or Low Sample Flow ............................................................................................... 221
9.2.2. High Flow..................................................................................................................... 221
9.3. Calibration Problems............................................................................................................ 221
9.3.1. Negative Concentrations ................................................................................................ 221
9.3.2. No Response ................................................................................................................ 222
9.3.3. Unstable Zero and Span................................................................................................. 222
9.3.4. Inability to Span - No SPAN Button.................................................................................. 222
9.3.5. Inability to Zero - No ZERO Button .................................................................................. 223
9.3.6. Non-Linear Response..................................................................................................... 223
9.3.7. Discrepancy Between Analog Output and Display ............................................................... 224
9.4. Other Performance Problems................................................................................................. 224
9.4.1. Excessive Noise ............................................................................................................ 224
9.4.2. Slow Response ............................................................................................................. 224
9.4.3. The Analyzer Doesn’t Appear on the LAN or Internet .......................................................... 225
9.5. Subsystem Checkout ........................................................................................................... 225
9.5.1. Detailed Pressure Leak Check ......................................................................................... 225
9.5.2. Performing a Sample Flow Check..................................................................................... 226
9.5.3. AC Power Configuration ................................................................................................. 226
9.5.4. DC Power Supply .......................................................................................................... 227
9.5.5. I
2
C Bus........................................................................................................................ 228
9.5.6. Touchscreen Interface ................................................................................................... 228
9.5.7. LCD Display Module....................................................................................................... 228
9.5.8. Relay Board ................................................................................................................. 228
9.5.9. Motherboard................................................................................................................. 229
9.5.9.1. A/D functions......................................................................................................... 229
9.5.9.2. Analog Output Voltages ........................................................................................... 229
9.5.9.3. Status Outputs....................................................................................................... 230
9.5.9.4. Control Inputs........................................................................................................ 230
9.5.10. CPU........................................................................................................................... 230
9.5.11. RS-232 Communication................................................................................................ 231
9.5.11.1. General RS-232 Troubleshooting ............................................................................. 231
9.5.11.2. Modem or Terminal Operation................................................................................. 231
07266B DCN6485