Amprobe 38XR-A, User Manual, Page: 22 / 112

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38XR-A
Measuring 4-20 mA Loop Current
1. Set the Function Switch to the loop-current function,
W
.
2. Connect the Test Leads: Red to mA , Black to COM .
3. Turn off power to the circuit being measured.
4. Open the test circuit (
X
) to establish measurement
points.
5. Connect the Test Probes in series with the load (to the
measurement points).
6. Turn on power to the circuit being measured.
7. Read the display. 0 % = 4 mA, 100 % = 20 mA.
ADDITIONAL FEATURES
Input Test Lead Warning
The meter emits a continuous tone when a test lead is
placed in the
mA or 10A input jack and the Function/
Range Switch is not set to a correct current position. (If
the meter is connected to a voltage source with leads
connected for current, very high current could result). All
current ranges are protected by fast acting fuses.