ABB Endura AZ series User Manual page 68

Endura AZ series integral and remote transmitter
Combustion oxygen monitor
...Calibration Procedures
<Cal Type>
Connect Test Gas 2
Air
1.00 %O2
Abort
• Close test gas • Continue
valve calibration
procedure
• Return to
Sensor Cal.
•
<Cal Type>
O2 1.00 % O2
Settling-Please Wait
Abort
• Close test gas
valve
• Return to
Sensor / Cal.
66
Waiting for Application of Test Gas (2
Note. The test gas used for this stage of the calibration is always Test
Gas 2.
Continue
Calibration In Progress (2
Note. The test gas used for this stage of the procedure is always test
gas 2.
Test gas detection is monitored and, if no test gas is detected, the
calibration fails. Otherwise the test gas valve is opened and the
procedure continues (not applicable if the Test Gas Type is Process
Air – see page
Test Gas Response Time monitored – if no response to the
application of the test gas is detected, the test gas valve is closed and
the calibration fails.
At this point the calibration procedure remains idle while the test gas
delay timer runs (AutoCal only).
Oxygen value is monitored for stability, if the stability criteria are not
met, the test gas valve is closed and the calibration fails.
Once the stability criteria have been met a cell impedance check is
performed and the test gas valve is closed.
Once the stability criteria have been met, a cell impedance check is
performed, the test gas valve is closed and, finally, the process values
are collated with those retained following the 1
stage and the calibration coefficients (Offset and Factor) are
re-calculated.
If either or both of the new coefficients are outside the permitted limits
(defined by Offset Limit and Factor Limit – see page
calibration fails and a
Performance Log.
nd
Point)
37
).
calibration entry is added to the
6 Calibration
nd
Point)
st
-point calibration
42
), the
IM/AZ20E–EN Rev. F