ETC BM80/2

AVO INTERNATIONAL
MEGGER®
BM80/2 SERIES
• Fully complies with the
requirements of BS 7671,
HD 384 and IEC 364
• Multiple insulation test
voltages from 50 V to
1000 V d.c. (according to
model)
• Remote control switched
probe option
• Optional RS232 port
• Optional current clamp
accessory
• Waterproof and dustproof
to IP54
Multi-Voltage Analogue/Digital
Insulation and Continuity Testers
DESCRIPTION
The MEGGER® BM80/2 Series are multivoltage insulation and continuity
testers offering advanced performance,
specification
and
features,
and
simplicity of use. They have insulation
test voltages from 50 V to 1000 V d.c.,
(500 V max. on BM81/2.)
The
comprehensive
specification
is
achieved using the latest electronic
design and technology.
The analogue/digital LCD incorporates
the benefits of electronic arc analogue
indication with unambiguous digital
readings. The analogue scale helps to
make rapid identification of insulation
condition, and to monitor variable
readings, and is complemented by the
precision and simplicity of a digital
display. All 3 instruments in the range
are identical except that the BM81/2
has a maximum test voltage of 500 V
and the BM82/2 has no continuity
range.
In compliance with BS 7671, IEC 364,
HD 384 and VDE 0413 Part 1 and 4, the
250 V, 500 V and 1000 V insulation
ranges have a 1 mA test current at the
minimum pass values specified. The
BM80/2 and BM81/2 continuity ranges
have a short circuit test current of
approximately 205 mA in order to
comply with the requirements of these
documents. Also on the continuity
ranges, is the facility to null the
resistance of the test leads.
This enables direct readings of low
resistance to be taken. A continuity
buzzer is included on the second
continuity range.
In addition to the insulation and
continuity ranges, the BM80/2 series
has a resistance range which measures
up to 100 kΩ on the digital scale and up
to 10 MΩ on the analogue scale. Due to
the low test voltage and current of this
range, it can be used to test circuits
with sensitive equipment connected,
without causing damage.
Two voltage ranges measure up to
50,0 V and 600 V a.c. or d.c.
respectively, and indicate the presence
of negative d.c. A voltage warning is
provided in these models, alerting the
user to the presence of external voltage
greater than 25 V, by displaying the
voltage level, even when measuring on
insulation and continuity ranges. The
voltage range will indicate if capacitive
charge remains after a test, and will
monitor the automatic discharge.
On all models testing is inhibited if 55 V
is detected.
Hands free operation is offered as
standard on all ranges except the
insulation ranges. Locking and nonlocking test buttons are provided with
each instrument for user selection. Use
of
the
non-locking
button
is
recommended to prevent accidental
mis-use and injury, and in cases where
continuous operation of an insulation
test is required the locking button can
be fitted. Alternatively the optional
accessory Switched Test Probe SP1 can
be used enabling remote operation of
the test button from the negative test
probe.
The BM80/2 series is rugged, and
therefore suited to tool bag treatment,
as well as having an IP54 environmental
protection rating which ensures
product reliability in wet and dusty
conditions. Exceptional battery life is
provided by six cells housed in
separate battery compartment.
The instruments are designed to IEC
1010-1, VDE0411 and BS4743 safety
standards.
Model Selection Chart
Insulation Test Voltage
50 100 250 500
1000
Cont
Range
BM80/2
✓
✓
✓
✓
✓
✓
BM81/2
✓
✓
✓
✓
✘
✓
BM82/2
✓
✓
✓
✓
✓
✘
APPLICATIONS
ELECTRICAL CONTRACTORS
The BM80/2 series, designed for flexibility and versatility, has a wide variety of applications and is ideal for testing
electrical installations to the British and International Wiring Regulations. Each instrument in the series conforms to
the requirements of Table 71 A in BS 7671, and to VDE 0413 parts 1 and 4, HD384 and IEC364.
The BM80/2 series can be used in both the domestic and industrial contracting environments. Test voltages of
250 V, 500 V and 1000 V d.c. are available. A 250 V insulation test voltage is necessary to test low voltage circuits
supplied by an isolating transformer. 500 V d.c. is the most commonly required voltage, since it is used to test all
circuits except low voltage circuits with a nominal voltage up to and including 500 V. The 1000 V d.c. test voltage is
used on circuits with a nominal voltage greater than 500 V and less than 1000 V.
The continuity ranges can be used to test the continuity of protective and ring final circuit conductors, and the
polarity of the conductors.
The BM80/2 series instruments can also be used for insulation and continuity tests on transformers, motors,
generators, domestic appliances, power tools, such as electric drills, and many other pieces of electrical equipment.
On high energy systems it is recommended that test leads with fused prods are used when measuring voltage.
These are available as an optional accessory.
SERVICE ORGANISATIONS
The BM80/2 series is ideal for use by Service Organisations due to the wide range of parameters which can be
measured with the instrument and its associated optional accessories.
The insulation test ranges are available for establishing the integrity of the insulation of internal parts such as
motors and transformers, as well as other equipment, and the continuity ranges can be used for circuit tracing and
operational checking of switches, etc.
With the resistance range measuring up to 100 kΩ on the digital display, and 10 MΩ on the analogue scale, basic
components such as resistors, capacitors and diodes can be tested for functionality.
Two voltage ranges (1-50,0 V and 0-600 V a.c./d.c.) enable internal mains voltages and power supply rail levels to be
measured, and with the addition of the MCC10 optional Current Clamp, appliance current consumptions can be
measured and compared to the rating plate.
These unique features offer measurement ranges and facilities not normally found in an Insulation Tester and could
therefore reduce the number of test instruments required by the Service Engineer.
ADVANCED APPLICATIONS
The addition of the DLB1 RS232 communication base will enable the BM80/2 family to produce a continuous output
of information corresponding to the value which is shown on the instrument display. The DLB1 is supplied complete
with AVODATA software which will enable the test information to be transferred to an IBM compatible computer.
This opens up applications for continuous monitoring of insulation resistance for the advanced user who may wish
to use the results for calculating Dielectric Absorption Ratios including Polarisation Index. The Polarisation Index
Ratio is defined as the ratio between insulation resistance values measured after 1 minute and 10 minutes; it is
useful for determining insulation quality without the need for temperature compensation or necessary referral to
historical test information.
The DLB1 when used in conjunction with the SP1 can also facilitate limited remote operation of the BM80/2 series
for applications where the product may need to be permanently installed in or near a piece of equipment.
TELECOMMUNICATIONS APPLICATIONS
In addition to the Installation Testing capabilities of the 1000 V, 500 V and 250 V insulation test ranges the BM80/2
series incorporates 100 V and 50 V testing facilities. These low voltage insulation tests enable the instrument to be
used for checking delicate components and equipment which would otherwise be damaged by higher voltages.
The instruments are designed to perform insulation tests on systems with up to 55 V of electrical interference, or
crosstalk, without the accuracy or reliability of results being effected and with no damage to the instrument.
A wide resistance measuring capability across the ranges enables a degree of cable fault pre-location to be
performed by using resistance to fault methods, and the wide voltage measuring capability allow accurate
measurement of line and battery voltages.
SPECIFICATION
VOLTAGE RANGE
SAFETY
INSULATION RANGES
Measuring Range
(i)
0 - 600 V a.c./d.c.
(ii) 1,0 - 50,0 V a.c./d.c.
The instruments meet the requirements for double insulation to IEC
1010-1 (1995), EN61010-1 (1995) to
Category III, 300 V phase to earth
(ground) and 440 V phase to phase.
Over voltage measuring facilities exist
to indicate capacitive discharges.
FUSE PROTECTED TO 440 V.
Nominal Test Voltage (d.c.):
50 V, 100 V, 250 V, 500 V and 1000 V
(1000 V not available on BM81/2.)
Measuring Range
50 V range: 0–10 GΩ
100 V range: 0–20 GΩ
250 V range: 0–50 GΩ
500 V range: 0–100 GΩ
1000 V range: 0–200 GΩ
Resolution: 0,01 MΩ
Terminal Voltage on Open Circuit
(d.c.): +15% maximum
Test Current
1 mA minimum at the minimum pass
values of insulation specified in BS
7671 (formerly the 16th Edition IEE
Wiring Regulations)on the 250V, 500 V
and 1000 V ranges.
50 V range: 0,2 mA at 250 kΩ
100 V range: 0,4 mA at 250 kΩ
Accuracy (at 20°C)
50 V range: ±2% ±2 digits ±4% per GΩ
100 V range: ±2% ±2 digits ±2% per GΩ
250 V range: ±2% ±2 digits ±0,8% per GΩ
500 V range: ±2% ±2 digits ±0,4% per GΩ
1000 V range:±2% ±2 digits ±0,4% per GΩ
Accuracy (at 20° C)
0-600 V Range
<450 V a.c. (50/60 Hz) and d.c.
±1%, ±2 digits
>450 V a.c. (50/60 Hz) and d.c.
±2%, ±2 digits
<450 V a.c. 400 Hz:
±5%, ±2 digits
1,0-50,0 V Range a.c./d.c.
±2%, ±3 digits
TEMPERATURE
COEFFICIENT
<0,1% per °C on all ranges.
DEFAULT VOLTMETER
The default voltmeter operates when
an external voltage >25 V a.c. or d.c. is
detected on any range except OFF and
. If this voltage exceeds 55 V then
insulation testing will be inhibited.
Reverse polarity d.c. will cause ‘-d.c.’
to appear on the DISPLAY.
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BATTERY CONDITION TEST
If the batteries are low during a test,
the symbol
will appear
automatically. The batteries can also
be checked by selecting the battery
condition test position. This will
indicate the result as volts and as a bar.
INSTALLATION CATEGORIES
Category III: Fixed wiring
installations within a building.
and
AUTOMATIC DISCHARGE
When the test button is released
after an insulation test the item
under test will be discharged
automatically. Any voltage present
will be indicated on the display so
that the discharge can be monitored.
POWER SUPPLY
Battery Type
6 x 1,5 V cells IEC LR6 type only.
Battery Life
3000, 5 second operations, at 1 kV
worst case
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Typical Terminal Voltage
Characteristics:
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AUTO SHUT-OFF
The instrument auto shut off operates
5 minutes after the start of a test, on
all ranges, except the insulation
ranges where it operates after
12 minutes. This can be adjusted to
60 minutes for the voltage, continuity
and KΩ ranges. Selecting an
insulation range or off will revert the
shut-off to 5 minutes.
CONTINUITY RANGES (not BM82/2)
Measuring Range: 0,01 - 99,9 Ω
GENERAL SPECIFICATION
(0-50 Ω on analogue scale)
Open Circuit Voltage: 5 V, ± 1 V
Short Circuit Current: 205 mA, ± 5 mA
Accuracy (at 20° C) ±2%, ±2 digits
Zero Offset Adjust: 0 - 9,99 Ω
Continuity Buzzer
Operates at less than 5 Ω approx.
Operating Range
-20 - +40 °C
Operating Humidity
90% R.H. at 40 °C max.
Storage Range
-25 - +65 °C
Environmental Protection IP54
RESISTANCE RANGE
FUSE
(can be used for diode testing)
Measuring Range: 0,1 - 100 kΩ
(0 - 10 MΩ on analogue scale)
Open Circuit Voltage: 5 V, ±1 V
Short Circuit Current: 20 µA, ±5 µA
Accuracy (at 20° C): ±3%, ±2 digits
Type
500 mA (F) 440 V, 32 x 6 mm Ceramic
HBC 10 kA minimum.
Indication of a ruptured fuse is
provided by the symbol
.
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Weight
625g (1,377 lbs approx.)
Dimensions
220 x 92 x 55 mm
(5,5 in x 2,33 x 2,16 in approx.)
E.M.C
The instrument meets EN50081-1 and
EN50082-1.
ACCESSORIES
SP1
MCC10
DLB2
Available as an optional accessory is
the SP1 switched probe. By simply
plugging the standard red positive
lead into the instrument, and with the
switched test probe inserted into a
unique socket on the top of the
insulation tester, tests can be made by
pressing the remote switch on the
probe.
The MCC10 Current Clamp will
connect to the instrument test leads
and enable direct indication of a.c.
current to be displayed on the 50,0 V
measuring range. Measurement in the
range of 1,0 A to 10,0 A a.c. can be
made, with overload up to 16 A at
marginally reduced accuracy, and the
clamp will span a conductor of 15mm.
This current measuring feature, not
normally associated with insulation
testers, greatly enhances the product
versatility and further increases the
applications for Electrical Contractors,
Utilities and Service Organisations.
The
DLB2
optional
accessory
communication interface provides an
RS232 serial data output simultaneous
to the displayed readings.
This remote operation significantly
increases the ease of use of the
product and reduces the time taken to
perform a test.
SPECIFICATION
Operating Temperature Range:-20°C to +40°C
Operating Humidity:90% RH @ 40°C max.
.Storage Temperature Range:-25°C to +65°C
Protection:- IP54
Safety:- Meets the safety requirements for double insulation to
IEC1010-2-31 (1995), EN61010-2-31 (1995),
IEC1010-1(1992), EN61010-1(1993),
Category III, 300 V phase to earth and
500 V phase to phase.
Weight:- 155 gm
When used in conjunction with the
AVODATA software provided and an
IBM compatible PC, long term
insulation monitoring and data storage
are possible.
AVODATA also enables test data to be
presented in tabular form and
facilitates the printing of certificates.
SPECIFICATION
SPECIFICATION
Current Range:- 1,0 A to 10 Amp a.c. R.M.S.
Output Voltage:- 1 V a.c. per 1 A a.c.
Accuracy:- ±2%
Operating Temperature:
-10°C to +50°C<75% RH
Storage Temperature:- -20°C to +75°C
Type of Sensing:- Induction coil for a.c.
current
Max. Output Impedance:- 75Ω
E.M.C. The unit meets EN50081-1 and
EN50082-1 (1992)
Max. Conductor Size:- 15 mm dia. cable,
or a 15 mm x 17 mm busbar.
Size (without leads):43 mm x 23 mm x 94 mm
(1,09 in x 50,8 in x 2,3 in approx.)
Weight:- 105 g
Baud Rate:- 9600
Operating Range:- -20°C to +40°C
Operating Humidity:90% RH @ 40°C max.
Storage Temperature Range:-25°C to +65°C
Safety:- Meets the safety
requirements for double insulation to
IEC1010-1(1992) EN61010-1(1993) to
Cat. III, 300 V phase to earth (ground)
and 500 V phase to phase.
E.M.C. Meets EN50081-1 and
EN50082-1 (1992)
Dimensions:- 94 mm x 46 mm x 42 mm
(2,3 in x 1,1 in x 1, 06 in approx.)
Weight:- 80 gm
The Company reserves the right to change the specification or design without prior notice. AVO and MEGGER are the Registered Trade
Marks of AVO INTERNATIONAL LIMITED.
ORDERING INFORMATION
Item (Qty)
Order Code
Multivoltage Insulation & Continuity Testers . . .BM80/2
(no 1000 V range) . . . . . . . . . . . . . . . . . . . . . . . . . .BM81/2
(no continuity range) . . . . . . . . . . . . . . . . . . . . . . .BM82/2
Included Accessories
Test lead set . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6220-437
Test & carry case . . . . . . . . . . . . . . . . . . . . . . . . .6420-112
UNITED KINGDOM
ARCHCLIFFE ROAD, DOVER, KENT CT17 9EN
ENGLAND
PHONE: +44 (0)1304-502100/202620
FAX: +44 (0)1304-502300/207342
TELEX: 96283 AVOMEG G.
UNITED STATES
4651 S. WESTMORELAND ROAD
DALLAS, TX 75237-1017 USA
PHONE: (214) 330-3255
FAX: (214) 333-3533
EXPORT FAX: (214) 337-3038
Optional Accessories . . . . . . . . . . . .Order Code
Fixed prod. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5210-350
Fused lead set FPK8 . . . . . . . . . . . . . . . . . . . . . . .6110-920
SP1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6220-606
MCC10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6111-290
DLB2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6220-602
Test record card (5 supplied) . . . . . . . . . . . . . . .6172-111
AVO INTERNATIONAL