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Calibrating the compact controller for inductive conductivity
Sensor status
Display
Meaning
[OK]
In order
[WRN]
Warning
[ERR]
Error
[ΔTcal] = Temperature difference of the calibration liquids
16.1.3
Calibrating the zero point
116
1.
Calibrate at the first calibration temperature calibration tem‐
perature; this calibration temperature should be close to the
selected reference temperature.
[CAL] to accept the first calibration point. At the same
2.
Press
time the temperature ranges for the second temperature
value are given.
3.
Important note:
in the same liquid with the second calibration temperature
(minimum temperature difference ± 10 °C)
4.
If the measured temperature has changed by more than
[WAIT] is displayed.
2 °C,
5.
If the temperature has changed by more than 10 °C,
[STABLE?] is displayed, and you can now terminate calibra‐
tion if the displayed temperature value no longer changes
(fluctuation < 0.3% of the value displayed). To do so, press
[CAL] .
6.
When the Maximum/Minimum temperature has been
[ACCEPT?] is displayed
reached,
ð You can now terminate calibration. To do so, press
[CAL] .
[CAL] to accept the temperature coefficient or [ESC] to
7.
Use
discard it
Status
[ΔTcal] > 20 °C
[ΔTcal] = 10 °C...20 °C
[ΔTcal] < 10 °C
Dry the sensor and keep it free from electromag‐
netic fields
If the zero point of the sensor is to be calibrated, it
is essential that the sensor is removed, rinsed and
dried before calibration. No electromagnetic fields
may influence the sensor as these electromagnetic
fields could distort calibration. Keep devices that
transmit radiation away from the sensor, such as
mobile phones, WLAN routers, sources of high
voltage, transformers etc.
[CHANGE TEMP] , now immerse the sensor
This process may take 10 ... 20 minutes
depending on the type of sensor.
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