INSULATION & CONTINUITY TESTERS
MEGGER®
BM100/4
AND BM101/4
• Suitable for testing to
the IEE Wiring
Regulations
• Complies with the
requirements of
BS 7671, HD 384 and
IEC 364
• Combined insulation
and continuity testing
• Insulation testing at
500 V d.c. to the
VDE 0413 Part 1
Analogue Insulation and
Continuity Testers
DESCRIPTION
The MEGGER BM100/4 and BM101/4
Insulation and Continuity Testers
provide an insulation test voltage of
500 V d.c.
right-angled connectors to prevent
them being accidentally pulled out of
the instrument. There is a shatter-
proof polycarbonate window for
protection of the meter. A fold away
support stand allows the user to
stand the instrument up rather than
holding it in the hand.
Also
available
as
optional
accessories are 4 mm right-angled
adaptors (black and red) enabling
use of leads with straight connectors.
A
third optional accessory is a
The instruments have two continuity
measuring ranges: 0 to 2 Ω and 0 to
200 Ω. The BM100/4 has an automatic
voltage indicating facility that warns,
before a test is executed, if the
instrument has been inadvertently
connected to an energised supply.
This warning is given by a reading on
a 0 to 600 V a.c. scale on the meter;
this scale also monitors the
discharging voltage following tests
on a capacitive circuit. The BM101/4
does not have the voltage indicating
facility, but instead has an additional
resistance range of 0 to 1 MΩ.
synthetic test and carry case.
FEATURES AND BENEFITS
All instruments are tough and robust,
well able to withstand the treatment
they are likely to receive in everyday
use or while being carried in an
electrician’s toolbag.
• Suitable for testing to the IEE
wiring regulations
• Complies with BS 7671, HD 384 and
IEC 364
• Combined insulation and
continuity testing
APPLICATIONS
The BM100/4 and BM101/4 are
• Insulation testing at 500 V d.c. to
the VDE 0413 Part 1 specification
intended
for
insulation
and
continuity testing during installation,
servicing or maintenance work. In
particular, they are suited to
domestic and industrial wiring
systems being tested to the IEE
wiring regulations. They may be used
for testing other items of electrical
• Designed under the IEC 1010-1
safety specification
A single rotary switch selects each
• Shrouded safety terminals with
right-angled test lead connectors
range, and has
a
position for
checking the condition of the internal
9 V replaceable battery. A push-
button is pressed to execute a test,
and upon release, the automatic
discharge circuit is connected across
the instrument’s terminals and
therefore across the item under test.
Test leads must only be removed
when the capacitive circuits have
discharged.
• Automatic discharge of capacitive
circuits after test
equipment
(e.g.,
transformers,
• Lightweight, tough and robust
motors, generators, etc.).
The instruments have been designed
to conform to the IEC 1010-1 safety
specification, and to performance
standard VDE 0413 Part 1.
Optional test leads with fused prods
are available for the BM100/4. It is
essential (to comply with HSE
Guidance Note GS 38) that these be
used when checking (by performing a
voltage test) that equipment has
been isolated from the supply,
especially in high energy situations.
Readings are shown on an analogue
meter; this has a fast response. It has
a white-on-black scale and an orange
“dayglow” pointer for clear, easy
reading in any lighting conditions.
The tough ABS plastic case
incorporates
shrouded
safety
terminal sockets and test leads with