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Table of Contents Teledyne API T703 Calibrator Operation Manual
xii
9.2.4.2. Sensor Inputs .............................................................................................................................. 159
9.2.4.3. Thermistor Interface .................................................................................................................... 159
9.2.4.4. Analog Outputs............................................................................................................................ 159
9.2.4.5. External Digital I/O....................................................................................................................... 160
9.2.4.6. I
2
C Data Bus................................................................................................................................ 160
9.2.4.7. Power-up Circuit.......................................................................................................................... 160
9.2.5. Power Supply and Circuit Breaker...................................................................................................... 160
9.2.6. AC Power Configuration ..................................................................................................................... 161
9.2.6.1. AC configuration – Internal Pump (JP7)...................................................................................... 162
9.3. Front Panel Touchscreen/Display Interface.............................................................................................. 163
9.3.1.1. Front Panel Interface PCA .......................................................................................................... 164
9.4. Software Operation................................................................................................................................... 164
9.5. O
3
generator operation............................................................................................................................. 165
9.5.1. Principle of Photolytic O
3
Generation ................................................................................................. 165
9.5.2. Generator Pneumatic Operation......................................................................................................... 166
9.5.3. O
3
Generator Electronic Operation ..................................................................................................... 166
9.5.3.1. O
3
Generator Temperature Control............................................................................................. 168
9.6. Photometer Operation............................................................................................................................... 169
9.6.1. Measurement Method......................................................................................................................... 169
9.6.1.1. Calculating O
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Concentration ...................................................................................................... 169
9.6.1.2. The Measurement / Reference Cycle.......................................................................................... 170
9.6.1.3. The Absorption Path.................................................................................................................... 172
9.6.1.4. Interferent Rejection .................................................................................................................... 173
9.6.2. Photometer Layout.............................................................................................................................. 174
9.6.3. Photometer Pneumatic Operation ...................................................................................................... 174
9.6.4. Photometer Electronic Operation........................................................................................................ 175
9.6.4.1. O
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Photometer Temperature Control .......................................................................................... 175
9.6.4.2. Pneumatic Sensors for the O
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Photometer ................................................................................. 176
10. MAINTENANCE SCHEDULE & PROCEDURES .......................................................... 177
10.1. Maintenance Schedule ........................................................................................................................... 177
10.2. Performing Leak Checks ........................................................................................................................ 181
10.2.1. Pressure Leak Check ....................................................................................................................... 181
10.3. Cleaning or replacing the Absorption Tube............................................................................................ 184
10.4. Rebuilding the Dry Air Pump .................................................................................................................. 184
10.5. Photometer UV Source Lamp Adjustment.............................................................................................. 185
10.6. Photometer UV Source Lamp Replacement .......................................................................................... 186
10.7. Adjustment or Replacement of Ozone Generator UV Lamp .................................................................. 187
11. GENERAL TROUBLESHOOTING & REPAIR .............................................................. 189
11.1. General Troubleshooting ........................................................................................................................ 189
11.1.1. Fault Diagnosis with WARNING Messages...................................................................................... 190
11.1.2. Fault Diagnosis With Test Functions ................................................................................................ 193
11.1.3. Using the Diagnostic Signal I/O Function......................................................................................... 195
11.2. Using the Analog Output Test Channel.................................................................................................. 196
11.3. Using the Internal Electronic Status LEDs.............................................................................................. 197
11.3.1. CPU Status Indicator ........................................................................................................................ 197
11.3.2. Relay PCA Status LEDs ................................................................................................................... 197
11.3.2.1. I
2
C Bus Watchdog Status LEDs ................................................................................................ 197
11.3.2.2. O
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Status LEDs ......................................................................................................................... 198
11.4. Subsystem Checkout.............................................................................................................................. 199
11.4.1. Verify Subsystem Calibration............................................................................................................ 199
11.4.2. AC Main Power................................................................................................................................. 199
11.4.3. DC Power Supply.............................................................................................................................. 200
11.4.4. I
2
C Bus.............................................................................................................................................. 201
11.4.5. Touchscreen Interface ...................................................................................................................... 201
11.4.6. LCD Display Module......................................................................................................................... 201
11.4.7. Relay PCA ........................................................................................................................................ 202
11.4.8. Photometer O
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Generator Pressure /Flow Sensor Assembly........................................................... 202
07223B DCN6378