Teledyne 9110E - Nitrogen Oxides Analyzer - Manual (Page 7)

Model 9110E Instruction Manual M9110E Documentation
M9110E Rev B vii
10.3.4. Relay Board....................................................................................................... 182
10.3.4.1. Heater Control ............................................................................................ 182
10.3.4.2. Valve Control .............................................................................................. 182
10.3.4.3. Status LEDs ................................................................................................ 182
10.3.5. Motherboard...................................................................................................... 183
10.3.5.1. A to D Conversion........................................................................................ 183
10.3.5.2. Sensor Inputs ............................................................................................. 183
10.3.5.3. Thermistor Interface .................................................................................... 184
10.3.5.4. Analog Outputs ........................................................................................... 184
10.3.5.5. External Digital I/O ...................................................................................... 185
10.3.5.6. I 2 C Data Bus ............................................................................................... 185
10.3.5.7. Power-up Circuit.......................................................................................... 185
10.3.6. Power Supply/ Circuit Breaker ............................................................................. 185
10.3.7. Communications Interface................................................................................... 186
10.3.7.1. Front Panel ................................................................................................. 187
10.3.7.2. Display....................................................................................................... 187
10.3.7.3. Keypad....................................................................................................... 188
10.3.7.4. Front Panel States LED’s............................................................................... 188
10.3.7.5. Display / Keyboard Interface Electronics......................................................... 188
10.4. Software Operation................................................................................................... 189
10.4.1. Adaptive Filter ................................................................................................... 189
10.4.2. Calibration - Slope and Offset .............................................................................. 190
10.4.3. Temperature/Pressure Compensation (TPC) .......................................................... 191
10.4.4. NO
2
Converter Efficiency Compensation ................................................................ 192
10.4.5. Internal Data Acquisition System (iDAS) ............................................................... 192
11. TROUBLESHOOTING & REPAIR ....................................................................................193
11.1. General Troubleshooting............................................................................................ 193
11.1.1. Warning Messages ............................................................................................. 194
11.1.2. Fault Diagnosis with Test Functions ...................................................................... 194
11.1.3. Using the Diagnostic Signal I/O Function............................................................... 195
11.1.4. Status LED’s...................................................................................................... 196
11.1.4.1. Motherboard Status Indicator (Watchdog) ...................................................... 196
11.1.4.2. CPU Status Indicator.................................................................................... 197
11.1.4.3. Relay Board and Status LEDs ........................................................................ 197
11.2. Gas Flow Problems ................................................................................................... 199
11.2.1. Zero or Low Flow Problems ................................................................................. 200
11.2.1.1. Sample Flow is Zero or Low .......................................................................... 200
11.2.1.2. Ozone Flow is Zero or Low ............................................................................ 201
11.2.2. High Flow.......................................................................................................... 202
11.2.3. Sample Flow is Zero or Low But Analyzer Reports Correct Flow................................ 202
11.3. Calibration Problems ................................................................................................. 202
11.3.1. Negative Concentrations ..................................................................................... 202
11.3.2. No Response ..................................................................................................... 203
11.3.3. Unstable Zero and Span...................................................................................... 204
11.3.4. Inability to Span - No SPAN Key........................................................................... 204
11.3.5. Inability to Zero - No ZERO Key ........................................................................... 205
11.3.6. Non-Linear Response.......................................................................................... 205
11.3.7. Discrepancy Between Analog Output and Display ................................................... 206
11.3.8. Discrepancy between NO and NO
X
slopes .............................................................. 206
11.4. Other Performance Problems...................................................................................... 206
11.4.1. Excessive noise.................................................................................................. 206
11.4.2. Slow Response .................................................................................................. 207
11.4.3. Auto-zero Warnings............................................................................................ 207
11.5. Subsystem Checkout................................................................................................. 208
11.5.1. Simple Vacuum Leak and Pump Check.................................................................. 208
11.5.2. Detailed Pressure Leak Check .............................................................................. 208
11.5.3. Performing a Sample Flow Check ......................................................................... 209
11.5.4. AC Power Configuration ...................................................................................... 210
11.5.5. DC Power Supply ............................................................................................... 210
11.5.6. I 2 C Bus ............................................................................................................. 211