WIKA CPH7600 - Handbuch (Seite 34)

34 WIKA operating instructions, model CPH7600
14051628.01 11/2012 GB/D
GB
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 effectively 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.
2) 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