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Teledyne API T703 Calibrator Operation Manual Table of Contents
xiii
11.4.9. Motherboard...................................................................................................................................... 204
11.4.9.1. A/D Functions............................................................................................................................ 204
11.4.9.2. Test Channel / Analog Outputs Voltage.................................................................................... 204
11.4.9.3. Status Outputs........................................................................................................................... 205
11.4.9.4. Control Inputs ............................................................................................................................ 206
11.4.9.5. Control Outputs ......................................................................................................................... 207
11.4.10. CPU ................................................................................................................................................ 207
11.4.11. RS-232 Communications................................................................................................................ 208
11.4.11.1. General RS-232 Troubleshooting............................................................................................ 208
11.4.11.2. Troubleshooting Calibrator/Modem or Terminal Operation..................................................... 208
11.4.12. Temperature Problems................................................................................................................... 209
11.4.12.1. Box / Chassis Temperature..................................................................................................... 209
11.4.12.2. Photometer Sample Chamber Temperature........................................................................... 209
11.4.12.3. UV Lamp Temperature............................................................................................................ 209
11.4.12.4. Ozone Generator Temperature............................................................................................... 210
11.5. Troubleshooting the O
3
photometer........................................................................................................ 210
11.5.1. Dynamic Problems with the O
3
photometer...................................................................................... 210
11.5.1.1. Noisy or Unstable O
3
Readings at Zero .................................................................................... 210
11.5.1.2. Noisy, Unstable, or Non-Linear Span O
3
Readings .................................................................. 211
11.5.1.3. Slow Response to Changes in Concentration........................................................................... 211
11.5.1.4. The Analog Output Signal Level Does Not Agree With Front Panel Readings......................... 211
11.5.1.5. Cannot Zero............................................................................................................................... 211
11.5.1.6. Cannot Span.............................................................................................................................. 211
11.5.2. Checking Measure / Reference Valve .............................................................................................. 212
11.6. Troubleshooting the O
3
Generator.......................................................................................................... 213
11.6.1. Checking The UV Lamp Power Supply ............................................................................................ 213
11.7. Trouble Shooting the Optional O
3
generator .......................................................................................... 214
11.7.1. Checking The UV Source Lamp Power Supply................................................................................ 214
11.8. Repair Procedures.................................................................................................................................. 215
11.8.1. Repairing Sample Flow Control Assembly ....................................................................................... 215
11.8.2. Disk-On-Module Replacement Procedure........................................................................................ 216
11.9. Technical Assistance.............................................................................................................................. 216
12. A PRIMER ON ELECTRO-STATIC DISCHARGE......................................................... 217
12.1. How Static Charges are Created............................................................................................................ 217
12.2. How Electro-Static Charges Cause Damage ......................................................................................... 218
12.3. Common Myths About ESD Damage..................................................................................................... 219
12.4. Basic Principles of Static Control............................................................................................................ 219
12.4.1. General Rules................................................................................................................................... 219
12.4.2. Basic anti-ESD Procedures for Analyzer Repair and Maintenance ................................................. 221
12.4.2.1. Working at the Instrument Rack................................................................................................ 221
12.4.2.2. Working at an Anti-ESD Work Bench........................................................................................ 221
12.4.2.3. Transferring Components from Rack to Bench and Back......................................................... 222
12.4.2.4. Opening Shipments from Teledyne API Customer Service. ..................................................... 222
12.4.2.5. Packing Components for Return to Teledyne API Customer Service....................................... 223
07223B DCN6378