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- Options of 250 V, 500 V, 1000 V insulation ranges
- 200 mA continuity range
- Instant response “ZAP” buzzer
- Voltage measurement to 600 V
- MEGGER Intelligent Safety System
- Patented backlit display
- K Ohms range for servicing
- Probe support for other measurements
- Waterproof and dustproof to IP54
- Complies with the requirements of BS 7671 16th Edition, and EN61557
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The MEGGER® BMM503 Insulation and Continuity tester provides all the necessary features for electrical installation testing and servicing needs. The instrument is microprocessor controlled to ensure outstanding performance with ease of use. For ultimate reliability, the BMM503 is waterproof and dustproof to IP54 and is supplied with a 3-year warranty.
The BMM500 series has been carefully designed to
maximise features which are of real benefit to the
electrical contractor or service engineer competing for
business in today’s market. |
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- Intelligent Safety System (ISS)
With increased pressure of time to complete jobs it is
inevitable that whilst performing tests on an electrical
system mistakes will occasionally be made exposing the
user to danger or under certain circumstances damaging
the instrument. The BMM500 series incorporates Megger’s
Intelligent Safety System which has been designed to
ensure that such mistakes don’t become disasters.
The ISS consists of:
- Live Circuit Warning,
Warns of accidental connection to a live circuit greater
than 25 V on any range.
- Safe Contact Detector
Prevents danger during continuity testing if contact is
made with a live circuit and minimises the chances of
blowing the instruments fuse.
- Test Lockout
Prevents test being energised in presence of external
voltages.
- Default Voltmeter
Displays presence of dangerous voltages on connected
circuit irrespective of instrument range selected.
- Auto Discharge
Safely discharges connected circuits after insulation test.
Instant Response "ZAP" Buzzer.
The audible buzzer range is frequently used for checking
for correct polarity in installed circuits and for point to
point connectivity in servicing. It is vital that the
instrument provides an instant response in such situations.
Many insulation testers take up to 1 second to respond
making them highly tedious and frustrating in use. The
BMM500 series features specially designed "instant
response" circuitry some 80 times faster than rival
products, making the instrument a pleasure to use.
The "Zap" Buzzer also features seven user selectable
thresholds below which the buzzer will sound
continuously. At values above the chosen limit the buzzer
will sound an intermittent tone unless the value is above 3 kΩ in which case no sound will be emitted.
This provides a useful audible approximation of the value
being measured.
- D.A.R.T. Display
The BM500 series incorporates a large backlit digital LCD
display combining Digital and Analog Response
Technology. The patented design provides the benefits of
true analog clarity, (with its ability to spot an momentary
insulation breakdown or poor continuity connection), with
the stability and simplicity of a digital reading. The display
is backlit enabling use in dimly lit areas, which is
especially useful when the installation power is turned off
for testing.
- Insulation Testing
Instruments are available with either one, two or three
insulation test voltages to suit all needs.
BM503 = 250 V, 500 V, 1000 V
BM502 = 500 V, 1000 V
BM501 = 500 V
Whichever model is chosen the ranges are capable of
supplying 1mA test current at the minimum pass levels
expressed by 16th Edition Wiring Regulations, (BS7671),
IEC364, HD384 and VDE0413 Parts 1 and 4.
- Continuity Testing
A hands free 200 mA continuity test range meeting the
requirements of UK and European legislation is also
included to ensure the accurate measurement of circuit
final conductors and primary and supplementary bonding.
- Test Lead Zeroing
The continuity range has a facility to automatically remove
the resistance of the test leads from the measured value, a
task that would normally have to be done manually. This
ensures that the measurement displayed is due entirely to
the conductors under test.
The insulation and continuity ranges are augmented by a
number of additional measurement ranges such as
autoranging voltage measurement up to 600 V ac/dc, and
Kilohms resistance measurement enabling component
diagnostic measurements during servicing. Current may be
measured by connection of an external mV output clamp
such as the optional Megger MCC10
- Pouch
The BMM500 series has been designed to withstand the
day to day handling and storage of a tool bag environment
and also comes complete with durable carry pouch with
provision for storage of all leads.
- Additional Servicing Measurements
The BMM500 series supports the connection of virtually
any mV probe. Such devices extend the range of
possible measurements almost endlessly including such
items as temperature probes, air speed indicators and high
current clampmeters such as used in heating and
ventilation (HVAC), and servicing.
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| Insulation Ranges |
| Test Voltages : |
250, 500, 1000 V |
| Measuring Range: |
| 1000 V |
0,01 MΩ to 10,000 MΩ |
| 500 V |
0,01 MΩ to 5,000 MΩ |
| 250 V |
0,01 MΩ to 2,000 MΩ |
| Test voltage accuracy: |
+15% maximum on open circuit |
| Test Current on load: |
1mA at min. pass value of
insulation specified in BS7671,
HD384 and IEC 364, 2 mA max.
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| Accuracy: |
| 1000 V |
±0,2% per 1000 MΩ, ±2% ±2 digits |
| 500 V |
±0,4% per 1000 MΩ, ±2% ±2 digits |
| 250 V |
±0,8% per 1000 MΩ, ±2% ±2 digits |
| Continuity |
| Measuring Range: |
0,01 Ω to 99,9 Ω (0 to 10 Ω on
analog scale) |
| Accuracy: |
±2% ±2 digits |
| Open circuit voltage: |
5 V ±1V |
| Test current: |
210 mA ±10 mA (0 - 2 Ω) |
| "Zap" Buzzer: |
Operates continuously at less than
selected limit or intermittent tone
above limit but below 3 kΩ.
(Silent above 3 kΩ) |
| Silent buzzer mode: |
Replaces audible tone with visual
indication on display when
measured value below selected
limit. |
| Resistance |
| Measuring Range: |
0,01 kΩ to 9,99 MΩ (0 to 100 MΩ on analog scale)
with Auto Ranging or Range Lock
Facility. |
| Accuracy: |
± 3% ± 2 digits |
| Open circuit voltage: |
5 V ±1V |
| Short circuit current |
25 μA ± 5 μA |
| Voltage |
| Measuring Range: |
±1V to ±600 V (0 to 1000 V on
analog scale) |
| Accuracy: |
0 to 600 V d.c. or a.c. (50/60 Hz)
±2% ±3 digit
0 to 600 V a.c. (400 Hz)
±5% ±3 digits |
| Millivolts |
| Measuring Range: |
±0,1 mV to 1 ±999 mV
(0 to 1000 mV on analog scale) |
| Accuracy: |
0,1 mV to 10 mV d.c./ a.c.
(50/60 Hz)
±2% ±5 digits
10mV to 1999mV d.c./a.c.
(50/60Hz)
±2% ±3 digits
0,1 mV to 10 mV a.c. (16-460 Hz)
±5% ±7 digits
10 mV to 1999 mV a.c. (16-460 Hz)
±5% ±3 digits |
| Probe Compatibility |
| Virtually any mV output probe may be connected to facilitate
measurements of other parameters such as temperature, humidity
etc. A unique probe offset adjustment facility is included. |
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| Battery Type:: |
6 x 1,5 V Alkaline cells IEC LR6 type |
| Battery Life: |
Typically 3000, 5 second 1 kV tests |
| General |
| Backlight |
User selectable LED backlight with auto turn off to save battery
life |
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Auto Shut Off
The BMM500 series feature a selectable auto shut off facility
which turns the instrument off after approximately 5 minutes,
(12minutes for insulation ranges), to conserve battery life. This
can be extended by the user to 60 minutes.
Safety
The BMM500 series complies with the latest international
directives concerning safety and electromagnetic compatibility.
The instruments meet the requirements for double insulation to
IEC 61010-1 (1995), EN 61010-1 (1995) Safety Requirements for
electrical equipment for measurement, control, and laboratory use.
Category III**, 300 Volts phase to earth (ground) and 440 Volts
phase to phase, without the need for separately fused test leads. If
required, fused test leads are available as an optional accessory.
** Relates to the transient over-voltages likely to be met in fixed
wiring installations.
Complies with the following parts of EN6155 Electrical safety in
low voltage systems up to 1000 V a.c. and 1500 V d.c. -
Equipment for testing, measuring or monitoring of protective
Fuse:
500 mA (F) 500 V, 32 x 6 mm Ceramic HBC 10 kA minimum.
Environmental
Conditions
Operating range:
-5 to +40ºC
Operating humidity:
90% RH at 40ºC max.
Storage
Temperature range:
-25 to +65ºC
Calibration Temperature: +20ºC
Temperature coefficient:
<0,1% per ºC
Physical Specifications
Dimensions
Length:
220 mm (8.66 inches)
Depth:
110 mm (4.33 inches)
Height: 45 mm (1.77 inches)
Weight:
742 g (1.63lbs)
(including batteries) |
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