Calibration - Endress+Hauser Liquisys M CLM223F Operating Instructions Manual

Liquisys M CLM223F
Coding Field
Function group
C

CALIBRATION

Calibration of
inductive sensors
C1 (1)
with a ring-shaped
opening
Remove sensor from the medium and dry completely.
Residual coupling
C111 start calibration
(airset)
Residual coupling is
C112
displayed (airset)
Endress+Hauser
6.5 Calibration
To access the "Calibration" function group, press the CAL key.
This function group is used to calibrate and adjust the transmitter. Two different types of
calibration are possible:
• Calibration by measurement in a calibration solution of a known conductivity.
• Calibration by entering the exact cell constant of the conductivity sensor.
Pay attention to the following:
• At first start-up of inductive sensors, an airset is absolutely required in order for the
measuring system to be able to generate accurate measuring values.
• If the calibration procedure is aborted by pressing the PLUS and MINUS keys at the same
time (return to C114, C126 or C136) or if the calibration is faulty, then the previous
calibration data are reinstated. A calibration error is indicated by the "ERR" message and
flashing of the sensor symbol on the display.
Repeat calibration!
• The instrument is automatically switched to hold during calibration (factory setting).
• After calibration, the system jumps back to the measuring mode. During the hold dwell
period the hold symbol is displayed.
• For conductive sensors only the fields C121 to C126 are relevant.
Selection or range
(factory settings bold)
Airs = Airset (1)
Cellc = cell constant (2)
InstF = installation
factor (3)
current measured value
-80.0 to 80.0 μS/cm
Display
C
CALIBRAT
AirS
C1
Calibrat
~
~
~ ~ ~
~
~ ~
µS/cm
0.0
C111
AirSet
5.3 µS/cm
C112
AirSetVal
Commissioning
Info
Calibration settings.
When commissioning inductive sensors,
an airset is mandatory.
The calibration of the sensor is to be
performed in air. The sensor must be dry.
Start calibration with CAL.
Residual coupling of measuring system
(sensor and transmitter).
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