Gb 6. commissioning, operation – WIKA CPH6600 Benutzerhandbuch
Seite 37
37
WIKA operating instructions, model CPH6600
14005103.03 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.
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".
6.13 Calibrating transmitters
6.13.1 Using the mA measurement function
The mA function enables to read out the 4 ... 20 mA output from the instrument being
calibrated. This can be done in two ways.
1) Passively – the test item generates 4 ... 20 mA 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 signal.
Passive
Active