Wika CPH7600 Manuale Utente Scaricare il pdf (Pagina 34)

34 WIKA operating instructions, model CPH7600

14051628.01 11/2012 GB/D

6. Commissioning, operation

8. Select the "NEXT" option to display the pressure at which the switch closed and the

hysteresis "SW DEADBAND".

9. Select the "NEW TEST" option to clear the data and perform another test.

10. Select the "DONE" option to end the test and return to the standard pressure

setting. Select the "NEXT" option to display the pressure at which the switch closed

and the hysteresis.

Example: [P1] ST will return to [P1].

The previous example uses a normally closed switch. The basic

procedure is eectively the same for a normally open switch, the display

will simply read "OPEN" instead of "CLOSE".

6.11 Calibrating transmitters

6.11.1 Using the mA/V measurement function

With the mA/V measuring function, 4 ... 20 mA output and 0 ... 30 V output can be read

from the test item. This can be done in two ways.

1) Passively – the test item generates 4 ... 20 mA or 0 ... 30 V directly. The value is read

on the calibrator.

Actively – the calibrator supplies a voltage supply of

DC 24 V

to the test item to

power the device while reading the resulting

4 ... 20 mA or 0 ... 30 V signal.

Passive Active

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 91 92

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Wika CPH7600 Manuale Utente Pagina 34