ABB Endura AZ series User Manual page 45

Endura AZ series integral and remote transmitter
Combustion oxygen monitor
Parameter
...Calibrate
...Cal. Diagnostics
...Cell Diagnostics
Slow Recovery
Diag.
Disabled
Enabled
Recovery Rate
Limit
High Impedance
Diag.
Disabled
Enabled
Measure
Impedance
Table 5.7 Calibrate Menu (Continued)
IM/AZ20E–EN Rev. F
Comment / [Range]
Warns if the probe's recovery rate is slower than
expected after a calibration or accuracy check is
measured.
Note. The recovery rate is measured only if the
difference between the test gas and process gas values
is > 10 % of the oxygen range.
Sets the limit to be used with the slow recovery
rate diagnostic function.
[0.1 to 10.0 % O / s]
2
Warns if the cell's impedance goes above a preset limit
(a high impedance can indicate a faulty or ageing cell).
Performs an impedance check when a Two point
calibration is selected – see page 39.
With a stable output from the cell, a cell impedance
check can be performed:
Note. The cell impedance cannot be calculated if the cell
output is less than 20 mV (test gas value greater than
approximately 8 % O
2
@ 700 ºC [1292 °F])
5 Programming
Default
Disabled
10.0 % O2 /
s
Disabled
100 K
43