AZ10 OXYGEN ANALYZER | COMBUSTION GAS ANALYSIS | OI/AZ10-EN REV. A
29
Preparation and setting up test gases
CAUTION
If the test gas connection is not sealed when not in use, air
leaking into the sensor via the connection causes
measurement errors. In a pressurized process, gases
venting to atmosphere through the connection cause
corrosion of, and/or block, the test gas tube. In a negative
pressure process, air leakage causes high O reading errors.
1 If the sensor is not connected permanently to test gas
on the sensor.
2 If the sensor is connected permanently to test gas pipework,
ensure that a valve is installed in the pipework adjacent to
the test gas connection and is closed.
3 Check the connections on both the sensor and the test gas
bottles. Test gas connections must be checked for leak tight
joints. Leaks can cause errors and drain away expensive
bottles of test gas.
4 If the ABB-supplied test gas entry is used, this section
prepares the system for manual calibration routines by
topage
28 for test gas supply configurations.
9 Start-up and operation
IM/AZ20E-EN
To Next Page