Weidmüller PT 100/4 Notice D'utilisation page 29

4.4 Basic calibration with an output signal from 4 ... 20 mA
1. Set the required temperature range on the printed circuit
board using the DIP switch, see the table on the module or
sides 33 and 34.
The DIP switches 1, 2 and 3 set the minimum input tempera-
ture ϑ .
min
The span (difference between minimum and maximum input
temperature) is set using the DIP switches 4, 5 and 6.
2. Professionally install module.
3. Set the "minimum" selected temperature on a PT 100 simula-
tor (when using a precision resistance decade, where neces-
sary observe DIN IEC 751 conversion table from °C to Ω!)
and calibrate the signal conditioner output signal to 4.000 mA
using the null potentiometer. (The potentiometers are located
behind the hinged cover).
4. Set the "maximum" selected temperature on a PT 100 simu-
lator (or precision resistance decade) and calibrate the signal
output to 20.000 mA using the span potentiometer.
5. Repeat steps 3 and 4 (approx. 2-3 times), until the required
accuracy is achieved.
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