6 Commissioning, operation
30 WIKA Operating Instruction, Model CPH7600
14051628
.01
07
/20
12
G
B/
D
8. Select the "
NEXT
" option to display the pressure at which the switch closed and the hysteresis.
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
".
6.10 Calibrating transmitters
6.10.1 Using the mA measurement function
The mA function enables the user to read out the 4 ... 20 mA output from the device being
calibrated. This can be done in two ways.
1.
Passively
– the device under test generates 4 ... 20 mA directly. This can be read on the
calibrator.
2.
Actively
– the calibrator supplies a loop power of DC 24 V to the device under test to
3. power the device while reading the resulting 4 ... 20 mA signal.
Passive
Active
GB