Teledyne 200E - Page 8

Model 200E Instruction Manual M200E Documentation
10.3.5. Motherboard.................................................................................................... 178
10.3.5.1. A to D Conversion ...................................................................................... 178
10.3.5.2. Sensor Inputs............................................................................................ 178
10.3.5.3. Thermistor Interface................................................................................... 179
10.3.5.4. Analog Outputs.......................................................................................... 179
10.3.5.5. External Digital I/O .................................................................................... 180
10.3.5.6. I
2
C Data Bus ............................................................................................. 180
10.3.5.7. Power-up Circuit ........................................................................................ 180
10.3.6. Power Supply/ Circuit Breaker............................................................................ 180
10.3.7. Communications Interface ................................................................................. 181
10.3.7.1. Front Panel ............................................................................................... 182
10.3.7.2. Display..................................................................................................... 182
10.3.7.3. Keypad..................................................................................................... 183
10.3.7.4. Front Panel States LED’s ............................................................................. 183
10.3.7.5. Display / Keyboard Interface Electronics........................................................ 183
10.4. Software Operation ................................................................................................. 184
10.4.1. Adaptive Filter ................................................................................................. 184
10.4.2. Calibration - Slope and Offset............................................................................. 185
10.4.3. Temperature/Pressure Compensation (TPC) ......................................................... 186
10.4.4. NO
2
Converter Efficiency Compensation ............................................................... 187
10.4.5. Internal Data Acquisition System (iDAS) .............................................................. 187
11. TROUBLESHOOTING & REPAIR ....................................................................................189
11.1. General Troubleshooting .......................................................................................... 189
11.1.1. Warning Messages............................................................................................ 190
11.1.2. Fault Diagnosis with Test Functions..................................................................... 190
11.1.3. Using the Diagnostic Signal I/O Function.............................................................. 191
11.1.4. Status LED’s.................................................................................................... 192
11.1.4.1. Motherboard Status Indicator (Watchdog) ..................................................... 192
11.1.4.2. CPU Status Indicator .................................................................................. 193
11.1.4.3. Relay Board and Status LEDs....................................................................... 193
11.2. Gas Flow Problems.................................................................................................. 195
11.2.1. Zero or Low Flow Problems ................................................................................ 196
11.2.1.1. Sample Flow is Zero or Low......................................................................... 196
11.2.1.2. Ozone Flow is Zero or Low .......................................................................... 197
11.2.2. High Flow........................................................................................................ 198
11.2.3. Sample Flow is Zero or Low But Analyzer Reports Correct Flow ............................... 198
11.3. Calibration Problems ............................................................................................... 198
11.3.1. Negative Concentrations.................................................................................... 198
11.3.2. No Response ................................................................................................... 199
11.3.3. Unstable Zero and Span .................................................................................... 200
11.3.4. Inability to Span - No SPAN Key ......................................................................... 200
11.3.5. Inability to Zero - No ZERO Key.......................................................................... 201
11.3.6. Non-Linear Response ........................................................................................ 201
11.3.7. Discrepancy Between Analog Output and Display .................................................. 202
11.3.8. Discrepancy between NO and NO
X
slopes ............................................................. 202
11.4. Other Performance Problems .................................................................................... 202
11.4.1. Excessive noise................................................................................................ 203
11.4.2. Slow Response................................................................................................. 203
11.4.3. Auto-zero Warnings .......................................................................................... 203
11.5. Subsystem Checkout............................................................................................... 204
11.5.1. Simple Vacuum Leak and Pump Check................................................................. 204
11.5.2. Detailed Pressure Leak Check............................................................................. 204
11.5.3. Performing a Sample Flow Check ........................................................................ 205
11.5.4. AC Power Configuration..................................................................................... 206
11.5.5. DC Power Supply.............................................................................................. 206
11.5.6. I
2
C Bus ........................................................................................................... 207
11.5.7. Keyboard / Display Interface.............................................................................. 207
11.5.8. Relay Board..................................................................................................... 208
11.5.9. Motherboard.................................................................................................... 208
11.5.9.1. A/D functions ............................................................................................ 208
044100102 Rev A vii