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Thermocouple Failure ................................................................................ 6-4
Zero Gas Range Error
................................................................................. 6-4
Diagnostics Checks
............................................................................................ 6-5
Wiring Checks
.............................................................................................. 6-6
Interconnecting Wiring P
roblem .............................................................. 6-6
Thermocouple Checks
................................................................................ 6-6
Shorted/Failed Ther
mocouple
................................................................... 6-6
Reversed Thermocouple W
ires
................................................................. 6-6
Thermocouple Compensation
.................................................................. 6-6
Circuit Check
................................................................................................ 6-6
Calibration/Aspirator Setup Checks
......................................................... 6-8
AC P
ower Checks
........................................................................................ 6-9
Fur
nace Checks
............................................................................................ 6-9
Process P
ressure Checks ........................................................................... 6-10
Cell Checks
................................................................................................. 6-10
General Troubleshooting
................................................................................ 6-11
Leak Check
................................................................................................. 6-11
Plugged Plumbing Check
........................................................................ 6-12
Aspirator Air Not Pulling Sample from P
rocess
................................... 6-12
Series 2000 LEDs
............................................................................................... 6-13
Auto Calibration Card LEDs
.................................................................... 6-13
Combustibles Card LEDs
......................................................................... 6-13
Combustibles and Methane Card LEDs
................................................ 6-14
Sensor Board (80471SE) LEDs
................................................................. 6-14
Chapter 7 Service and Parts
Cell Replacement/Cleaning .............................................................................. 7-4
Thermocouple Replacement
............................................................................ 7-6
Fur
nace Replacement
........................................................................................ 7-8
Combustibles Detector Replacement
............................................................ 7-10
Hot-W
ire Combustibles Detector Replacement .................................... 7-10
Box Heater Diagram
.................................................................................. 7-13
Replacement Parts List .................................................................................... 7-14
Appendix A Serial Communications
Communication Protocols ..........................................................................A-1
General Serial Communication Commands
...........................................A-3
Development Serial Communication Commands
.................................A-4
Responses
.....................................................................................................A-6
Variable Table
......................................................................................................A-7
Sample Program
...............................................................................................A-24
Starting/Monitoring a Calibration: An Example
.........................................A-25
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