Specifications

To measure current, do the following:

1. Turn off power to the circuit. Discharge all high-voltage

capacitors.

2. Insert the red test lead into the mA or 20A terminal

and the black test lead into the COM terminal. When

measuring current at 200mA below, insert the red test

lead into mA terminal while measuring current 200mA

or above, insert the red test lead into 20A terminal

3. Set the rotary switch to an appropriate measurement

position in A range.

4. 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.

5. Turn on power to the circuit.

The measured value shows on the display.

If the value of current to be measured is unknown, use

the maximum measurement position (20A) and 20A

terminal, and reduce the range step by step until a

satisfactory reading is obtained.

Replace appropriate rating fuse when the fuse is burnt.

Fuse specification: 0.315A. 250V fast type fuse,

φ5 x 20mm

At 20A Range: For continuous measurement

seconds and interval not less than 15 minutes.

When current measurement has been completed,

disconnect the connection between the testing leads

and the circuit under test.

Note

Model UT39E: OPERATING MANUAL