Microamps Μa Measurement - Amprobe AMP-330 User Manual

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W Caution
During current measurement keep the jaws away from other current-
carrying devices such as transformers, motors or energized wires, as they
may negatively influence accuracy of the measurement.
Microamps μA Measurement
The μA DC ( ) function on the Meter is primarily for
HVAC flame sensor testing. To test a heating system
flame sensor:
1. Turn the heating unit off and locate the wire
between the gas-burner controller and the
flame sensor.
2. Disconnect one of the flame sensor wires.
3. Turn the rotary switch on the Meter to
4. Connect the black test lead to the COM terminal
and the red test lead to the μA terminal.
5. Using alligator clips, connect a meter in series by
attaching one alligator clip to the disconnected
flame sensor probe and the second one to the
disconnected control-module terminal.
6. Turn heating unit on and check the reading on
the Meter.
7. Refer to the heating unit documentation for
what the correct reading should be.
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