19
E. Measuring Resistance
(see figure 7)
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.
The resistance ranges are:
The Model UT50A/UT50B
: 200
Ω
, 2k
Ω
, 20k
Ω
, 200k
Ω
,
2M
Ω
, 20M
Ω
and 200M
Ω
.
The Model UT50C
:
200
Ω
, 2k
Ω
, 20k
Ω
, 200k
Ω
, 2M
Ω
and 200M
Ω
.
To measure resistance, connect the Meter as follows:
1. Insert the red test lead into the
V
Ω
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.
Note
l
The test leads can add 0.1
Ω
to 0.3
Ω
of error to the
resistance measurement.To obtain precision readings
in low-resistance, that is the range of 200
Ω
, short-
circuit the input terminals beforehand and record the
reading obtained (called this reading as X). (X) is
the additional resistance from the test lead.
Then use the equation:
Measurement Operation(7)
( figure 7)
red
black
Model UT50A/B/C: OPERATING MANUAL
