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Automatic Calibration in Air
The slope is corrected using the saturation value (100 %), similar to air satu-
ration of water. Since this analogy only applies to water-vapor saturated air
(100 % relative humidity) and often the calibration air is less humid, the relative
humidity of the calibration air must also be specified. If you do not know the
exact value of the relative humidity of the calibration air, you can take the fol-
lowing reference values for a sufficiently precise calibration:
• Ambient air: 50 % rel. humidity (average)
• Bottled gas (synthetic air): 0 % rel. humidity
NOTICE!
The sensor membrane must be dry. Be sure to keep temperature and pres-
sure constant during calibration. If there is a temperature difference between
calibration medium and measured medium, the sensor must be kept in the
respective medium for several minutes before and after calibration.
Menu Display
Select calibration mode
Select “Module OXY 3400-067”
The module is in function check
(HOLD) mode. The assigned current
outputs and relay contacts behave as
configured (BASE).
Press
enter
to confirm.
Select “Automatic - Air”
calibration method
Remove sensor and place it in air.
Press
enter
to confirm.
Calibration
Return
25.6°C
Module PH 3400-032
Module CONDI 3400-051
Info
80.3%Air
Module OXY 3400-067
Module OXY 3400-067
Return
25.6°C
Data entry
Product calibration Sat
Zero correction
80.3%Air
Automatic - Water
Automatic - Air
Calibration / Adjustment
Automatic Calibration in Air
N
ot
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he displa
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y v
ar
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ersion.