Weidmuller PT 100/4 signal conditioners for current output Manual de usuario descargar pdf (Pagina 9)

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 41 and 42.

The DIP switches 1, 2 and 3 set the minimum input tempera-

ture ϑ

min

The span (dif ference 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 pr ecision resistance decade, wher e 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 ar e 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 (appr ox. 2-3 times), until the required

accuracy is achieved.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 17 18

Sin comentarios

Weidmuller PT 100/4 signal conditioners for current output Manual de usuario Pagina 9