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Model UT71A/B/C/D/E: OPERATING MANUAL
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:
Insert the red test lead into the
terminal and the
black test lead into the
COM
terminal.
Set the rotary switch to
; press
BLUE
button
to select measurement mode and connet the
test leads across with the object being tested.
The beeper comes on continuously for open
conditions, that is test resistance 50
.
1.
2.
3.
The
BLUE
button cycles among resistance, continuity,
and diode.
Note
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.
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.
The LCD displays
OL
indicating open-circuit or the
tested resistor value is higher than the maximum
range of the Meter.
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 4000 counts but the accuracy remains unchanged.
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.
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