Weidmuller PT 100/4 signal conditioners for current output - Manual (Page 5)

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4.2 Basic calibration with a signal output from 0 ... 20 mA
1.
Select the temperature range on the printed circuit boar d
using the DIP switch, see table on the module or pages 41
and 42.
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. Add 1 % of the temperatur e span to the selected “ minimum”
temperature and set this value on a PT 100 simulator (when
using a pr ecision r esistance decade, wher e necessary ob-
serve DIN IEC 751 conversion table fr om °C to
Ω
!) and cali-
brate the signal conditioner output signal to 0.200 mA using
the null potentiometer . (The potentiometers are located be-
hind the hinged cover).
4. Set the “ maximum” selected temperatur e on a PT 100 simu-
lator (or pr ecision r esistance decade) and calibrate the signal
output to 20.000 mA using the S
pan potentiometer .
5. Repeat steps 3 and 4 (approx. 2-3 times), until the required
accuracy is achieved.