Measurement Operation (3)
B. DC Current Measurement
Warning
Never attempt an in-circuit current measurement where the open-circuit voltage
between the circuit and ground is greater than 300V.
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.
The current measurement has 3 measurement positions on the rotary switch: 2000µA,
20mA and 200mA.
To measure current, do the following:
1. Turn off power to the circuit. Discharge all high-voltage capacitors.
2. Set the rotary switch to an appropriate measurement position in A
range.
13
Model UT20B: OPERATING MANUAL
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