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TTI-22 Iss.04– 11/15
In this case check the sensor either at a fixed point or by comparison calibration with a reference
thermometer.
8.
If you have selected DIN IEC 75, set the calibration temperature range (e.g. –50 to 200 °C; 0 to 420
°C, etc.) in the lines Cal.Low and Cal.High.
9.
Enter the maximum sensor temperature in the line Max.Temp.
If the sensor producer has not stated the maximum temperature, choose one that is approx. 5°C
above the upper limit (Cal.High) of the calibration temperature range.
Do not enter a value that is lower than the value entered for Cal.High. Otherwise the maximum
temperature limit is not monitored.
Caution:
Exceeding the permissible operation temperature range can cause irreversible change in
sensor behaviour and may require a new calibration.
10. Enter the calibration parameters (R0, R[0.01 °C], A, B, C, C[1], ...C[5]) according to the
calibration certificate by overwriting the default values.
The number of parameters depends on the temperature range and the selected temperature
calculation method.
In IEC-751 the constant C is only used for temperatures below 0 °C. You can either set "C" to "0" or
use the default value.
11. After you have concluded your input, press <ESC> and save the new values.
Example for a Pt 100 sensor:
Cal. No.: 000001
Temp. Calculation: IEC-751
Validity of calibration: 180 days
Calibration temperature range: 0 - 200 °C
Maximum sensor temperature: 250 °C
R0
= 100.017
A
= 0.0039126
B
= -5.9153E – 7
After the example values have been entered, the display shows the following:
Fig. 7 - 6
Example for sensor data
After the maximum sensor temperature has been exceeded
