Teledyne 300E - Page 6

M300E DOCUMENTATION Model 300E Carbon Monoxide Analyzer
Instruction Manual
6 P/N 04288 Rev: A
9.3.3. Performing Leak Checks ................................................................................................ 150
9.3.4. Performing a Sample Flow Check .................................................................................. 152
9.3.5. Flow Calibration.............................................................................................................. 153
9.3.6. Cleaning the Optical Bench ............................................................................................ 154
9.3.7. Cleaning Exterior Surfaces of the M300E ....................................................................... 154
10. THEORY OF OPERATION ....................................................................... 155
10.1. MEASUREMENT METHOD......................................................................................................... 156
10.1.1. Beer’s Law ................................................................................................................... 156
10.1.2. Measurement Fundamentals........................................................................................ 156
10.1.3. Gas Filter Correlation ................................................................................................... 157
10.2. PNEUMATIC OPERATION .......................................................................................................... 161
10.2.1. Sample Gas Flow......................................................................................................... 161
10.2.2. Critical Flow Orifice ...................................................................................................... 162
10.2.3. Sample Pressure Sensor.............................................................................................. 162
10.2.4. Sample Flow Sensor .................................................................................................... 163
10.2.5. Particulate Filter ........................................................................................................... 163
10.2.6. Valve Options............................................................................................................... 163
10.3. ELECTRONIC OPERATION ........................................................................................................ 164
10.3.1. Overview ...................................................................................................................... 164
10.3.2. CPU ............................................................................................................................. 166
10.3.3. Optical Bench & GFC Wheel ........................................................................................ 166
10.3.4. Synchronous Demodulator (Sync/Demod) Assembly ................................................... 169
10.3.5. Relay Board ................................................................................................................. 173
10.3.6. Mother Board ............................................................................................................... 175
10.3.7. Power Supply/ Circuit Breaker...................................................................................... 178
10.4. INTERFACE ............................................................................................................................. 179
10.5. SOFTWARE OPERATION .......................................................................................................... 182
10.5.1. Adaptive Filter .............................................................................................................. 183
10.5.2. Calibration - Slope and Offset ...................................................................................... 184
10.5.3. Measurement Algorithm ............................................................................................... 184
10.5.4. Internal Data Acquisition System (iDAS) ...................................................................... 185
11. TROUBLESHOOTING & REPAIR PROCEDURES .................................. 187
11.1. GENERAL TROUBLESHOOTING HINTS ....................................................................................... 187
11.1.1. Interpreting WARNING Messages................................................................................ 188
11.1.2. Fault Diagnosis with TEST Functions........................................................................... 191
11.1.3. Using the Diagnostic Signal I/O Function ..................................................................... 193
11.1.4. Internal Electronic Status LED’s ................................................................................... 195
11.2. GAS FLOW PROBLEMS ............................................................................................................ 199
11.2.1. Typical Flow Problems ................................................................................................. 199
11.3. CALIBRATION PROBLEMS......................................................................................................... 201
11.3.1. Miss-Calibrated ............................................................................................................ 201
11.3.2. Non-Repeatable Zero and Span................................................................................... 202
11.3.3. Inability to Span – No SPAN Key.................................................................................. 202
11.3.4. Inability to Zero – No ZERO Key .................................................................................. 203
11.4. OTHER PERFORMANCE PROBLEMS .......................................................................................... 203
11.4.1. Temperature Problems................................................................................................. 203