WIKA WUD-26 - Handbuch (Seite 19)

11611057.01 GB/D 11/2013
19 Operating instructions/Betriebsanleitung, WUD-2x
8. Adjustment of zero point
The WUD-2x pressure transducers are maintenance free. All WIKA pressure transducers are factory calibrated and under
normal operating conditions will not require field adjustment. If, nevertheless, a zero offset should occur, it can be adjusted
via a built-in potentiometer.
For verification and adjustment of the zero point, vent the pressure transducer to zero (0) psi for gauge reference pressure
transducers. Use a 0.040" to 0.060" (1 to 1.5 mm) jeweler's screwdriver for adjustment.
■ For instruments with absolute pressure measuring ranges or +/- measuring ranges, a sufficient calibration
equipment as well as a vacuum pump are also necessary for the zero point adjustment.
■ Span adjustment is not necessary after zero point correction.
8. Adjustment of zero point GB
Procedure
1. Restore power to the pressure transducer.
2. Lift the sticker.
3. Adjust the zero point by means of the potentiometer in pressureless state.
Check the zero point by means of a suiable instrument. Clockwise rotation
means an upward zero offset, anti-clockwise rotation means a downward zero
offset.
4. Push the sticker on.
For further information
(+49) 9372/132-8976