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05
Calibrate sensors:
In the calibrate sensors menu it is possible to calibrate one or both sensors. The logdata is
saved in separate files specified by the user before starting (extension CLO). When
measuring temperatures over 0°C, it is necessary to calibrate by at least 3 temperatures.
When measuring temperatures under 0°C it is necessary to calibrate by at least 3 positive
temperatures and 1 negative temperature. It is recommended that the calibration
temperatures are chosen so that the normal operating range lies within the temperatures
which have been used for calibration.
It is possible to continue working on calibration data which has been saved in a file. This is
done either by typing the name of the file in which previous calibration data has been saved
in Log file setup menu or simply by pressing <ENTER> in the same menu and choose the
relevant file from the list of log files.
The log file set-up automatically shows the sensor ID for the used sensor, which can be
altered by the user. Enter a stable criteria, suitable for the measuring set-up. The test option
is an extra protection for bad logging.
Log file setup
Serial number for sensor 1
: 9401000
Stable time (min. )
:
5
Maximum deviation (+/-
°
C)
:
0.02
Stability test
:
Yes
Press <Return> to accept, use arrows to move
The logdata menu will show this information in the measuring window in the following way:
Calibrating
Sensor 1 : Log filename : test1.CLO
Stable cr/-0.020
°
C during
5.0
min.
Sensor 2 : Log filename : test2.CLO
Stable cr/-0.020
°
C during
5.0
min.
Temperature
Resistance
Stable
Sensor 1
0.020 °C
100.0078 OHM
NO
Sensor 2
-0.030 °C
99.9883 OHM
NO
< F2 > Enter new logdata
< F3 > Log True
< F4 > Calculate
< F5 > Edit logdata
< ESC > aborts
Following softkeys are defined:
<F2>
Enter new logdata file, restarts the calibration.
<F3>
Log True, enters the true temperature in
°
C here.
<F4>
Calculates the coefficient, when there are at least 4 logs.
<F5>
Edit logdata, removes unwanted log value.
<ESC> Abort, leaves the calibration routine.
Use <F3> for each temperature log wanted for calibration.
