22
Figure 5
5. Measuring and Generating Current (4 to 20 mA)
1. To measure current use the input terminals in the front of the calibrator.
Select the mA function on the lower display. Current is measured in mA
and percentage of range. The range on the calibrator is set to 0% at 4
mA and 100% at 20 mA.
For example:
If the current measured is displayed as 75% then the mA value is 16
mA.
Note
: The display will indicate “OL” when the measured current
exceeds the nominal range of current measurement (24 milliAmps).
2. To source current the same connections are used. From the configuration
screen select mA source or mA Sim-2W.
3.
Note
that this function can only be done on the
LOWER
screen. Also in
the source mode the calibrator will generate 0 to 24 mA using its own
internal 24 volt supply whereas in the simulate mode the calibrator acts
as a 2 wire transmitter and requires an external 24 volt supply.
4. Pressing any of the arrow keys will start the output mode and allow you
to use the arrow keys to adjust the mA output.
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