Specifications

E. Measuring Resistance (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.

To measure resistance, connect the Meter as follows:

1. Insert the red test lead into the VΩ

terminal and the

black test lead into the COM terminal.

2. Set the rotary switch to an appropriate measurement

position in Ω range.

3. Connect the test leads across with the object being

measured.

The measured value shows on the display.

(figure 5)

The test leads can add 0.1Ω to 0.3Ω of error to the

resistance measurement. To obtain precision readings

in low-resistance, that is the range of 200Ω, short-

circuit the red and black test leads beforehand and

record the reading obtained (called this reading as X).

Then use the equation:

measured resistance value (Y) – (X) = precision

readings of resistance.

For high resistance (>1MΩ), it is normal taking several

seconds to obtain a stable reading.

When there is no input, for example in open circuit

condition, the Meter displays “1”.

When resistance measurement has been completed,

disconnect the connection between the testing leads

and the circuit under test.

Note

Black Red

Model UT39E: OPERATING MANUAL