Troubleshooting | 5-11
WARNINGS
Cell Life Nearing Its End The ZrO
2
cell is nearing its end of life. This
is based on calibration history.
Low cell output
Comb Detector Life Nearing
Its End
The combustible detector sensitivity is near
its end of life. This is based on calibration
history.
Low detector output
Methane Detector Life Nearing
Its End
The methane detector sensitivity is near
its end of life. This is based on calibration
history.
Low Detector output
High Cell Mv The combustible measurement is no longer
valid (set to full scale) due to lack of O
2
Hydrocarbon upset
Analog Output 1 Out Of Range The analog output value is saturated (high
or low)
Improperly set range
Analog Ouptut 2 Out Of Range The analog output value is saturated (high
or low)
Improperly set range
Analog Ouptut 3 Out Of Range The analog output value is saturated (high
or low)
Improperly set range
Last O
2
Span Calibration
Failed
The last oxygen span calibration failed Tank Empty, bad solenoid,
didn’t wait long enough,
Bad Cell
Last O
2
Zero Calibration Failed The last oxygen zero calibration failed Tank Empty, bad solenoid,
didn’t wait long enough,
Bad Cell
Last Comb Calibration Failed The last combustible calibration failed Tank Empty, bad solenoid,
didn’t wait long enough,
bad detector
Last CH
4
Calibration Failed The last methane calibration failed Tank Empty, bad solenoid,
didn’t wait long enough,
bad detector
Last Flow Calibration Failed The last ow sensor calibration failed Plugged sample system or
bad sensor
Oxygen Calibration Required O
2
Calibration is required Last Calibration failed or
unit has never been cali-
brated
Comb Calibration Required Combustible Calibration is required Last Calibration failed or
unit has never been cali-
brated
Methane Calibration Required CH
4
Calibration is required Last Calibration failed or
unit has never been cali-
brated
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