Special Instructions For Integrated Pressure Equalising Valve - WIKA Delta-trans Mode D'emploi

9. Service and maintenance / 10. Special instructions ...
Position of potentiometers in the electronics case
GB
10. Special instructions for integrated pressure equalising valve or
4-way valve manifold
10.1 Integrated pressure equalising valve
For zero point control on working
processes. Offset errors can be adjusted
using the zero point potentiometer (see
Chapter 9. Service and Maintenance)
Principle of operation

When the button is pressed, the
separation between the measuring chambers is released. The pressure
is thus equalised in both chambers, and the differential pressure is zero.
Releasing the button separates the chambers again and the current differen-
tial pressure is measured.
12
SP potentiometer for span
NP potentiometer for zero point
2158991.01
Differential pres-
sure drops to zero
WIKA Operating Instructions Differential Pressure Transmitter DELTA-trans
Measuring differential
pressure again