Operation; Testing Precautions - AVO MEGGER BM25 Guide De L'utilisateur

Testing Precautions

The circuit under test must be completely de-energized
and isolated before test connections are made.
1. The instrument must only be used by suitably trained
and competent persons.
Circuit connections must not be touched during a test.
2.
3. The BM25 can give an electric shock. Highly capacitive
circuits (e.g. long lengths of cable) charged to several kV
can create a potentially lethal charge.
4. Care must be taken to prevent capacitive circuits
becoming disconnected during a test, leaving the circuit in a
charged state.
5. The voltmeter and automatic discharge feature of the BM25
should be regarded as additional safety features and not a
substitute for normal safe working practice.
6. When carrying out prolonged tests unattended, care should
be taken that no harm or damage can be caused.
7. When using the 'BURN' feature, care should be taken that
no harm or significant damage can be caused.
8. In certain circumstances, break-down of the circuit under
test may conceivably cause the instrument to terminate the
test, possibly causing a loss of display while the circuit
remains energised. In this event, the circuit must be
discharged and the instrument turned off before touching
any connections.
8

Operation

9. The BM25 has an environmental protection classification of
IP54 with the charging recess cover securely closed. It is
important from a safety point of view (and to avoid unwanted
leakage currents) to ensure that the testing terminal area
and the charging recess are kept free from dirt and moisture.
10. Before use, any surface water on the instrument must
be removed, especially from the test lead sockets
11. Fuse replacements must be of the correct type and rating.
Refer to the Specification section for correct replacement
fuse details.
12. If any part of the instrument is damaged, it should not be
used, but returned to the manufacturer or an approved repair
company.
13. Should the plug on the power cord not be the type for
your socket outlets (receptacles), do not use an adaptor. Use
a suitable alternative mains cord. Wires in power cords are
coloured as follows:
Earth (Ground)
Neutral
Phase (Line)
U.K/International U.S.A.
Yellow/Green Green
Blue White
Brown Black