Oxygen Analyzer Calibration - ABB ACF-NT Operator's Manual

Oxygen Analyzer Calibration

Zero Calibration
Span Calibration
Maintenance Interval
Calibration Control
Zero Calibration Data
Span Calibration Data
Manual Calibration
36
For the zero calibration a test gas cylinder with 1 to 4 Vol% oxygen in nitrogen is
used.
For the span calibration air from the air purifier with a stable content of 20.96 Vol%
oxygen is used.
According to the officially established maintenance interval zero and span calibra-
tion have to be performed once per month.
The oxygen analyzer calibration is performed as externally controlled calibration.
The FTIR controller generates the control signals for zero and span alignment and
for the switching of the solenoids. The FTIR controller also controls the purging
times which are needed to ensure that the proper gas is at the analyzer sensor.
Calibration Method
Calculation Method
Test Gas Concentration
Calibration Method
Calculation Method
Test Gas Concentration
For service purposes a manual calibration is also possible. For this the zero and
span concentrations have to be entered in
Menu  Configure  Calibration Data  Manual calibration 
Test gas concentration
Never start an automatic calibration for the oxygen analyzer. As there is no need
no purging times are set for automatic calibration.
Operator's Manual ACF-NT, ACF-NT V0309
Common
Offset
1 to 4 Vol% O in N
2 2
Common
Amplification
20.96 Vol% O (dry air)
2
42/23-572 EN Rev. 5