Bürkert 8619 multiCELL WM AC, Operating Instructions Manual

Page: 138 / 194

8.11.8 Calibrating an analogue input connected to a current
output or a voltage output
If an analogue input, AI1 or AI2, is connected to the current or voltage analogue output of an external instrument
(for instance, the 4...20 mA output of a pressure measuring device type 8311), calibrate the analogue input
according to Fig. 92.
This calibration is used to precisely adjust the bounds of the analogue input to the bounds of the connected
instrument.
Refer to section 8.9 to access the "Calibration" menu.
The analogue input signal is adjusted (slope and offset) and
the 8619 displays the input calibrated value.
→
Generate a 4 mA current on the 4...20 mA output of the
instrument connected to the analogue input.
→
Enter 4 mA.
→
Wait for the measurement to stabilise.
Calibration Mx:Inputs Current calibr.
OK
1er point
4.001 mA
4.000 mA
Calibrate using a
2nd point?
NO
2nd point
20.001 mA
20.000 mA
→
Generate a 20 mA current on the 4...20 mA output of the
instrument connected to the analogue input.
→
Enter 20 mA.
→
Wait for the measurement to stabilise.
OK
YES
The 8619
adjusts the
offset.
AI1/AI2
Value received on the
analogue input.
Calibration result
16.02 mA
SAVE
Mode:general
Mode:chlorine
Fig. 92 : Example for the calibration of an analogue input with respect to the current output of a pressure measuring device
type 8311
138
Adjustmentandcommissioning
Type 8619
English