User Manual
25
UT108/109 OPERATING MANUAL
C. AC/DC Current Testing (see gure 6)
Warning
Before connecting the Meter in serial to the tested in-circuit, disconnect in-circuit
power.
If the fuse burns out during measurement, the Meter may be damaged or the
operator himself may be hurt.
Use proper terminals, function, and range for the measurement. When the testing
leads are connected to the current terminals, do not parallel them across any circuit
otherwise it will burn the fuse or damage to the Meter.
To measure AC/DC current, connect the Meter as follows:
1. Insert the red test lead into the “μA, mA” or “A” terminal and the black test lead into the
COM terminal.
2. Set the rotary switch to an appropriate measurement position in “μA, mA” or “A” .
Press blue button to switch between AC and DC measurement mode.
3. AC current measurement display true rms value and press Hz button to obtain the
frequency value, input amplitude and frequency response refer to accuracy
specications.