wtw CL 298, Operating Manual

Page: 34 / 76

Operation
pH 298, LF 298, Oxi 298, Cl 298
34
ba77196e03 07/2018
Recommissioning
the sensor after
calibrating
4.7.2 Calibration evaluation
The measuring transmitter has a simple calibration evaluation.
Critical calibration values are displayed in the measured value display with the
status indicator CAL.
If the displayed calibration values are not plausible, you can cancel
the calibration and thus the taking over of the displayed calibration
values with
<  > + <  > . The measuring transmitter continues
measuring with the old calibration values.
7 Confirm the calibration data with <ENTER> .
Calibration is completed.
8 Confirm with <ENTER> . The display returns to the measured value
display.
9 After calibrating, immerse the sensor in the test sample again.
10 Wait for a stable measured value.
Evaluation Cal INFORMATION Measured value
display Explanation
Successful
calibration Calibration values
determined Measured value
No status display
indicator The calibration values
determined are used.
Calibration
successful with
restriction  Calibration values
determined
 Error message Out
of limit!
Measured value
Status display CAL: The calibration values
determined are used but
they are outside the limits
of a good calibration.
a
Unsuccessful
calibration  Calibration values
of the last valid cal-
ibration

Error message
!Calibration error!
Current measured
value
Status indicator of
the last valid
calibration The calibration values
determined are outside
the allowed limits for a
valid calibration.
They are neither stored
nor used.
b
a. If your requirements of the measurement accuracy are high, we recommend that you check the calibration
(also refer to the operating manual of your sensor).
b. The measuring transmitter continues measuring with the old calibration values.
To obtain a new calibration with valid calibration values:
Recalibrate or exchange the sensor (wear part!) (also refer to the operating manual of your sensor).