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9 Calibration
Calibrating the relative cell constant
NOTE!
Depending on the mode set for the relative cell constant in the configuration of the conductivity input,
either a common relative cell constant is used for all 4 measuring ranges or a relative cell constant is
determined separately for each measuring range
chapter 9.2 "Calibration methods for CR conductivity sensors (conductive)", page 47
Procedure for calibrating the relative cell constant
1. Start calibration of the relative cell constant:
Device menu > Calibrate > Calibration of relative cell constant
2. If in the configuration of the conductivity input the mode is set to "One CC for all MR", this step can
be skipped.
Use the "Up" and "Down" operating keys to select the measuring range to calibrate from measuring
ranges 1 to 4 and confirm by pressing the "OK" operating key.
3. Make sure that the sensor has been cleaned and is immersed in the test solution.
Wait until the measured value displayed stabilizes and then confirm the result of the measurement
by pressing the "OK" operating key.
4. Use the "Up" and "Down" operating keys to set the conductivity value to the reference conductivity
of your test solution and confirm the entry by pressing the "OK" operating key.
5. The device displays the relative cell constant determined. The relative cell constant is accepted if
you press the "OK" operating key or discarded if you press the "Back" operating key. This completes
the calibration.
Calibrating the temperature coefficient (TC)
NOTE!
In the calibration default settings, the "Temperature acquisition" item can be set for automatic acquisition
of calibration values when the calibration temperatures are reached. This requires either an integrated
temperature sensor or transmission of the measured temperature from a master via an interface.
chapter 9.3 "Calibration default settings", page 49
chapter 12.3.1 "CR input (resistivity conductivity)", page 59
Procedure for calibrating the temperature coefficient (TC)
1. Start calibration of the temperature coefficient:
Device menu > Calibrate > Calibration of temperature coefficient
2. Use the "Up" and "Down" operating keys to select the measuring range to calibrate from measuring
ranges 1 to 4 and confirm by pressing the "OK" operating key.
3. Use the "Up" and "Down" operating keys to change the operation temp. to the temperature value
normally encountered in the process in your system and confirm by pressing the "OK" operating key.
The operation temp. must differ from the configured reference temp. by at least 6 °C (see display of
allowed temperature ranges on the display). The device accepts the operation temp. only if this dif-
ference exists.
4. with "automatic" temperature acquisition (integrated temperature sensor required)
The current measured values for conductivity and temperature as well as operation temp. and refer-
ence temp. are shown on the display. Bring the temperature of your sample in succession to the val-
ues of the operation temp. and reference temp. The order does not matter. Value acquisition takes
place automatically.
with "manual" temperature acquisition
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