Megger BM80/2 Series, User Manual

Page: 9 / 89

Continuity Testing (
Ω
)
( BM80/2 & BM81/2 only)
The continuity tests are activated when the
probes make contact. The test operates
without the need to press the TEST button.
When the test leads are removed the reading
will hold for a few seconds and then reset.
This range is not suitable for diode testing
since the automatic contact detector will not be
activated when connected to a diode. The k
Ω
range can be used for diode testing.
1. Set the selector switch to
Ω
.
2. Connect the test leads. The pointer will
appear when connection to <10 M
Ω
is
made.
3. The test will activate automatically.
4. After the test probes are disconnected, the
reading will be held for a few seconds.
Continuity Bleeper ( )
(
BM80/2 & BM81/2 only)
The continuity bleeper sounds continuously
when less than 5
Ω
is detected. Short bleeps
will sound for resistances lower than a few k
Ω
and above 5
Ω
. If contact to less than 5
Ω
is
maintained for five seconds, the bleeper stops,
and the display shows the measured
resistance.
1. Set the selector switch to .
2. Connect the test leads.
Zeroing of Test Lead Resistance
(
BM80/2 & BM81/2 only)
The resistance of the test leads can be nulled
on the continuity ranges. To zero the
resistance (up to 9,99
Ω
), short the test leads
together, wait for a stable reading, and press
the TEST button. The symbol will appear to
indicate the zero has been adjusted.
1. Select either Continuity range.
2. Short the test leads across a known good
conductor.
3. When the reading has stabilized, press the
TEST button. A short ‘bleep’ will sound
and the zero offset symbol will appear.
4. To release the zero offset press the test
button again or switch the instrument off.
8