Testing For Continuity - UNI-T UT71A Operating Manual

Model UT71A/B: OPERATING MANUAL
Note
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When measuring low resistance, the test leads can
add 0.1 to 0.2 of error to resistance measurement.
To test the leads, touch the probe tips together and
read the resistance of the leads. If necessary, you
can press REL to automatically subtract this value.
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For high-resistance measurement (>1M ), it is normal
taking several seconds to obtain a stable reading.
In order to obtain precision readings, use the test
lead as short as possible.
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The LCD displays OL indicating open-circuit or the
tested resistor value is higher than the maximum
range of the Meter.
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When testing the resistance signal from the calibrator,
it is necessary to press and hold the RANGE while
turning on the Meter to change the maximum display
to 2000 counts but the accuracy remains unchanged.
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When resistance measurement has been completed,
disconnect the connection between the testing leads
and the circuit under test and remove testing leads
away from the input terminals.
D. Testing for Continuity
Warning
To avoid harms to you, please do not attempt to input
voltage higher than 60V DC or 30V rms AC.
To avoid possible damages to the Meter or to the
devices under test, disconnect circuit power and
discharge all the high-voltage capacitors before
measuring continuity.
To test for continuity, set up the Meter as Figure 3-4
and do the following:
1. Insert the red test lead into the
black test lead into the COM terminal.
2. Set the rotary switch to
to select measurement mode and connet the
test leads across with the object being tested.
3. The beeper comes on continuously for open
conditions, that is test resistance
The BLUE button cycles among resistance, continuity,
and diode.
terminal and the
; press BLUE button
50 .
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