Calibration; Offset/Zero Point Correction And Slope Correction Of The Temperature Input; Calibrating The Relative Time Constant; Calibration Using Customer-Specific Reference Solution ("Cal Edit" Function) - JUMO 202710/30 Operating Manual

7.1 Offset/zero point correction and slope correction of the
temperature input
The parameters "OFFS" (see page 29) and "SCAL" (see page 30) can be used
to carry out a zero point correction or slope correction of the temperature
input.
Reliable references (e.g. ice water, controlled precision water baths, or similar)
must be available for this purpose.
If a correction has been carried out (deviation from the default setting), this is
indicated with the message "Corr" when the device is switched on.
The default setting of the zero point and slope values is: "oFF" = 0.0, i.e. no
correction performed.
Effect of the correction on the temperature display
Correction type
Offset/zero point correction
Offset/zero point correction and
slope correction
7.2

Calibrating the relative time constant

In addition to direct entry, the relative cell constant can also be determined
automatically via the parameter "CELL Corr" (see page 22).
7.2.1 Calibration using customer-specific reference solution ("CAL Ed-
it" function)
This function enables the user to automatically calibrate the relative cell con-
stant with a user-specific reference solution featuring a precisely identified
conductivity.
Menu selection
Start configuration.
Select submenu "SEt ConF".
Call up parameter "CAL".
Use the
Measuring
Immerse the conductivity measuring cell in the reference solution.
Press the
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Device display
Measured value – "OFFS"
(measured value – "OFFS") × (1+ "SCAL"/100)
and keys to select the "Edit" setting option.
key for >2 s.
The main display of the device shows the measured
actual value (e.g. 1796 µS/cm) and the subsidiary dis-
play shows "CAL." with a symbol rotating around the
last digit.

7 Calibration

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