Bürkert 8619 multiCELL WM AC, Operating Instructions Manual

Page: 137 / 194

8.11.7 Calibrating an analogue input, AI1 or AI2, at one point
(offset), with respect to a measured value other than
chlorine
This calibration does not replace the calibration of the measuring sensor connected to the analogue input.
Refer to section 8.9 to access the "Calibration" menu.
The 8619 adjusts the offset.
→
Immerse the probe of the sensor (for example a pH sensor) in the first buffer
solution: The 8619 displays the value measured for the solution.
→ Wait for the measurement to stabilise.
→
Enter the value of the buffer solution (indicated on the bottle).
Calibration Mx:Inputs PV offset calibration
OK
7.001 pH
7.000 pH
AI1/AI2
Solution measured
value.
Calibration result
Offset: -3,498 pH
SAVE
Mode:general
OK
Fig. 91 : Example for the calibration at 1 point of an analogue input with respect to the pH measured by an instrument
having a 4...20 mA output
137
Adjustmentandcommissioning
Type 8619
English