WIKA S-11 - Adjustment of Zero Point and Span; Preparation for Adjustment; Adjusting Zero Point; Setting the Span

21WIKA operating instructions pressure transmitter, model S-11
GB
14043046.01 06/2012 GB/D/F/E
7. Adjustment of zero point and span
7. Adjustment of zero point and span
Only adjust the span-setting potentiometer if calibration equipment is available which has at
least three times the accuracy of the pressure transmitter.
7.1 Preparation (gure A)
To gain access to the potentiometers, open the instrument as follows:
■
Disconnect the electrical connection  from the instrument.
■
Remove the clamping nut .
■
Carefully pull the instrument connector  from the instrument.
■
Connect the instrument connector  to the power supply and a
display unit (e.g. ammeter, voltmeter) according to the connection
diagram.
7.2 Adjustment of zero point (gure B)
■
Go to the start of the measuring range.
■
Using potentiometer "Z", adjust the minimum output signal
(e.g. 4 mA)
7.3 Setting the span (gure B)
■
Go to the end of the measuring range.
■
Using potentiometer "S", adjust the maximum output signal
(e.g. 20 mA)
■
Check the zero point and if there is any deviation, re-adjust it.
■
Repeat the procedure until the zero point and the span are set
correctly.



A
B