ABB Endura AZ series User Manual page 92

Endura AZ series integral and remote transmitter
Combustion oxygen monitor
Parameter
Recovery Rate
Calibration /
Accuracy Check
New probe / cell Not applicable –
Time Since Last Cal
Table 8.8 Performance Log Fields
90
Comment / Range
The maximum recorded rate of change of the calculated oxygen value when the
test gas is removed and the measurement returns to the process value.
Notes: A valid recovery rate cannot be calculated if:

a manual calibration / accuracy check is performed

either of the test valves are set to manual mode before the test is complete

a subsequent calibration or accuracy check is started before the test is
complete

the difference between the test gas value and process value is less than
10 % of the oxygen range

the maximum rate of recovery is not achieved within 3 minutes of removal of
the test gas
The elapsed time between the last successful calibration and this entry.
is displayed
8 Troubleshooting
IM/AZ20E–EN Rev. F