22
(figure 4)
Note:
- If the value of current to be measured is unknown, use the maximum measurement position
(10A) and reduce the range step by step until a satisfactory reading is obtained.
- When current measurement has been completed, disconnect the connection between the
testing leads and the circuit under test.
D. AC Current Measurement (see figure 4)
Warning!
Never attempt an in-circuit current measurement where the open-circuit voltage
between the circuit and ground is greater than 500V.
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.
1. Turn off power to the circuit. Discharge all high-voltage capacitors.
2. Turn the rotary switch to suitable range, press SELECT to change from DC to AC
measurement.
3. Insert the red test lead into the VΩmA or 10A terminal and the black test lead
into the COM terminal.
4. Set the rotary switch to an appropriate measurement position in A
range.
5. Break the current path to be tested. Connect the red test lead to the more positive
side of the break and the black test lead to the more negative side of the break.
6. Turn on power to the circuit.
The measured value shows on the display.
E. Resistance Measurement (see figure 5)
Warning!
To avoid damages to the Meter or to the devices under test, disconnect circuit
power and discharge all the high-voltage capacitors before measuring
resistance.
