Wika WUD-26 Manual do Utilizador descarregar pdf (Página 19)

11611057.01 GB/D 11/2013

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 eld adjustment. If, nevertheless, a zero oset should occur, it can be adjusted

via a built-in potentiometer.

For verication 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 sucient 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

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 oset, anti-clockwise rotation means a downward zero

oset.

4. Push the sticker on.

For further information

(+49) 9372/132-8976

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Wika WUD-26 Manual do Utilizador Página 19