Operation; Testing Precautions - Megger BM25 Guia Del Usuario

OPERATION

Testing Precautions

G
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.
2. Circuit connections must not be touched during a test.
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
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
Yellow/Green
Blue
Brown
U.S.A.
Green
White
Black