WIKA 700.02 - Manual (Page 11)

WIKA operating instructions differential pressure gauge with piston 11
2103869.04 12/2012 GB/D/F/E
GB
7. Commissioning, operation
Switch point adjustment
Preference should be given to setting the switch point before installing the
measuring instrument. The necessary test path is generated manually (e.g. by
means of an antimagnetic screwdriver).
Manual test path generation
Plus media chamber
antimagnetic
The switch point can also be set in a pressurised condition after installation. The
switch points are set at the factory when the set points are given.
The switch point is adjusted by turning the contact adjustment screws on the
outside of the reed case.
Anticlockwise rotation:
Switch point can be moved in the direction of the
start of the measuring range
Clockwise rotation:
Switch point can be moved in the direction of the
end of the measuring range
Zero point check
In general, the zero point should only be checked and adjusted at zero pressure.
The system fastening lug on the back of the case can be easily slackened off for
zero point correction of the pressure gauge. Now the zero point can be readjusted
by moving the measuring system to the right or left. After this has been done the
measuring system is to be secured again with the mounting screw (recommended
tightening torque of the mounting screw 1.3 Nm).