Commissioning Smartec S CLD134
56 Endress+Hauser
6.4.14 Calibration
To access the "Calibration" function group, press the CAL key.
This function group is used to calibrate 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.
!
Note!
• 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).
Coding Field Selection or range
(factory settings bold)
Display Info
C
Function group
CALIBRATION
Calibration settings.
C1 (1)
Compensation of
residual coupling
Airs = Airset (1)
Cellc = cell constant (2)
InstF = installation factor (3)
When commissioning inductive sensors, an
airset is mandatory.
The calibration of the sensor is to be
performed in air. The sensor must be dry.
Remove sensor from the medium and dry completely.
C111
Residual coupling start
calibration (airset)
current measured value Start calibration with CAL.
C112
Residual coupling is
displayed (airset)
-80.0 ... 80.0 μS
Residual coupling of measuring system
(sensor and transmitter).
C113
Calibration status is
displayed
o.k.
E xxx
If the calibration status is not o.k., the second
display line shows an explanation of the
error.
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