5 Troubleshooting the Gas Analyzer Troubleshooting
78
Troubleshooting
If the measurement accuracy is in doubt or if an INOP indicates a technical problem, please perform
the tests listed below. They are described in detail in the chapter Checking and Calibrating the Gas
Analyzer.
Please perform the tests in the following order:
1 Zero Calibration
2 Leak Check
3 Pump Test
4 Flow Rate Check
5 Pressure Sensor Test
6 Component Status Check
7 Gas Calibration Test
If the flow rate cannot be adjusted or if any of the other tests fails, the gas analyzer needs to be
exchanged. Please order the appropriate exchange unit.
NOTE An exchange instrument always comes without the top mounting. Please remove and keep the
mounting from the top of the instrument including the screws for use with the exchange instrument.
O
2
CHANGE SCALE The O
2
wave is clipped. Select a more appropriate wave scale to display
the whole wave.
O
2
OVERRANGE
Numerics replaced by -?-, INOP tone
The O
2
value is higher than the measurement range. If you suspect a
false high value, follow the troubleshooting procedure described in this
chapter.
O
2
UNABLE TO MEAS
Numerics replaced by -?-, INOP tone
The Gas Analyzer currently cannot measure O
2
. If this INOP persists,
follow the troubleshooting procedure described in this chapter.
O
2
ZERO FAILED
Numerics replaced by -?-, INOP tone
An O
2
zero calibration failed. Follow the troubleshooting procedure
described in this chapter.
INOP Message, Indication What to do
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