Martel Electronics DPC300A - Manual (Page 22)

20 20
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".
4.6 Calibrating transmitters
4.6.1 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.
[P1]
CONFIG LOWER MORE
psi
30.000
mA MEASURE 100.00%
20.000 mA
Passive
[P1]
CONFIG LOWER MORE
psi
30.000
mA MEAS/24V 100.00%
20.000 mA
Active