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Operator’s Manual ACF-NT, ACF-NT V0309
42/23-572 EN Rev. 5
Oxygen Analyzer Calibration
Zero Calibration
For the zero calibration a test gas cylinder with 1 to 4 Vol% oxygen in nitrogen is
used.
Span Calibration
For the span calibration air from the air purifier with a stable content of 20.96 Vol%
oxygen is used.
Maintenance Interval
According to the officially established maintenance interval zero and span calibra-
tion have to be performed once per month.
Calibration Control
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
Common
Calculation Method
Offset
Zero Calibration Data
Test Gas Concentration
1 to 4 Vol% O
2
in N
2
Calibration Method
Common
Calculation Method
Amplification
Span Calibration Data
Test Gas Concentration
20.96 Vol% O
2
(dry air)
Manual Calibration
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.
Summary of Contents for ACF-NT
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