14
Automatic Calibration in Water
The slope is corrected using the saturation value (100 %) of water in equilib-
rium with air.
During calibration the module is in function check (HOLD) mode.
Current outputs and relay contacts of the module behave as configured
(BASE module).
NOTICE!
The calibration medium must be in equilibrium with air. Oxygen exchange
between water and air is very slow. Therefore, it takes a relatively long time
until water is saturated with atmospheric oxygen. If there is a temperature
difference between calibration medium and measured medium, you must
keep the sensor in the respective medium for several minutes before and after
calibration.
Menu Display
Selecting a calibration mode
Select module:
The module is in func-
tion check (HOLD) mode. The assigned
current outputs and relay contacts
behave as configured (BASE).
Press
enter
to confirm.
Select “Automatic - Water” calibration
method.
Remove sensor and immerse it in cal
medium (air-saturated water).
Press
enter
to confirm.
Calibration
Return
25.6°C
Module PH 3400-035
Module CONDI 3400-051
Info
80.3%Air
Module LDO 3400-170
Module LDO 3400-170
Return
25.6°C
Automatic - Air
Zero correction
Product calibration Sat
80.3%Air
Automatic - Water
Calibration / Adjustment
Automatic Calibration in Water
N
ot
e:
T
he displa
y ma
y v
ar
y depending on the devic
e v
ersion.