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Teledyne API T801 NDIR CO2 Analyzer Operation Manual Table of Contents
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9.2.2. Performing a Manual Calibration Check..............................................................................................163
9.2.3. Performing a Manual Calibration.........................................................................................................164
9.3. Assessing Calibration Quality.....................................................................................................................166
9.4. Calibrating the Electronic Subsystems.......................................................................................................166
9.4.1. Pressure Calibration............................................................................................................................166
9.4.2. Flow Calibration...................................................................................................................................168
Part III – Maintenance and Service ...................................................................................................................169
10. MAINTENANCE SCHEDULE & PROCEDURES...........................................................171
10.1. Maintenance Schedule .............................................................................................................................171
10.2. Predictive Diagnostics ..............................................................................................................................175
10.3. Maintenance Procedures..........................................................................................................................175
10.3.1. Replacing the Sample Particulate Filter ............................................................................................175
10.3.2. Rebuilding the Sample Pump............................................................................................................176
10.3.3. Performing Leak Checks ...................................................................................................................177
10.3.4. Performing a Sample Flow Check.....................................................................................................178
10.3.5. Cleaning Exterior Surfaces of the T801 ............................................................................................178
11. TROUBLESHOOTING AND SERVICE ..........................................................................179
11.1. General Troubleshooting..........................................................................................................................179
11.1.1. Fault Diagnosis with WARNING Messages ......................................................................................180
11.1.2. Fault Diagnosis with TEST Functions ...............................................................................................183
11.1.3. DIAG SIGNAL I/O: Using the Diagnostic Signal I/O Function .....................................................184
11.2. Using the Internal Electronic Status LEDs ...............................................................................................186
11.2.1. CPU Status Indicator.........................................................................................................................186
11.2.2. Relay PCA Status Indicators.............................................................................................................186
11.3. Gas Flow Problems ..................................................................................................................................187
11.3.1. T801 Internal Gas Flow Diagrams.....................................................................................................188
11.3.2. Typical Sample Gas Flow Problems .................................................................................................188
11.4. Calibration Problems ................................................................................................................................190
11.4.1. Miscalibrated .....................................................................................................................................190
11.4.2. Non-Repeatable Zero and Span .......................................................................................................190
11.4.3. Inability to Span – No SPAN Button..................................................................................................191
11.4.4. Inability to Zero – No ZERO Button...................................................................................................191
11.5. Other Performance Problems...................................................................................................................191
11.5.1. Temperature Problems......................................................................................................................192
11.6. Subsystem Checkout................................................................................................................................192
11.6.1. AC Mains Configuration ....................................................................................................................192
11.6.2. DC Power Supply ..............................................................................................................................192
11.6.3. I
2
C Bus...............................................................................................................................................193
11.6.4. Touch Screen Interface .....................................................................................................................194
11.6.5. LCD Display Module..........................................................................................................................194
11.6.6. Relay Board.......................................................................................................................................194
11.6.7. Sensor Assembly...............................................................................................................................194
11.6.8. Pressure/Flow Sensor Assembly ......................................................................................................195
11.6.9. Motherboard ......................................................................................................................................196
11.6.10. CPU.................................................................................................................................................197
11.6.11. RS-232 Communications ................................................................................................................198
11.6.12. CO
2
Sensor STATUS LED’s............................................................................................................199
11.7. Repair Procedures....................................................................................................................................199
11.7.1. Repairing Sample Flow Control Assembly........................................................................................199
11.7.2. Disk-On-Module Replacement Procedure ........................................................................................200
11.8. FRequently Asked Questions (FAQ’s)......................................................................................................201
11.9. Technical Assistance................................................................................................................................202
12. PRINCIPLES OF OPERATION ......................................................................................203
12.1. NDIR Measurement of CO
2
......................................................................................................................203
12.2. Operation within the T801 Analyzer .........................................................................................................204
07274B DCN6418