Megger BMM2000 Bruksanvisning
Megger
Multimeter
BMM2000
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MBMM2000 Series
Insulation Multimeters
User Guide
SAFETY
WARNINGS
•Safety Warnings Precautionsand must be read and
understood before the instrument is used. They
must be
observed during use.
•The circuit under test be de-energised and isolatedmust
before connections are made except for voltage
measurement.
•Circuit connections be touched during a test.must not
•After insulation tests, capacitive circuits be allowed tomust
discharge
before disconnecting the test leads.
•The Live Circuit Warning and Automatic Discharge are
additional safety features and
should not be regarded as a
substitute for normal safe working practice.
•Replacement fuses be of the correct type and rating.must
Failure to fit the correctly rated fuse
will result in damage to
the instrument in the event of an overload.
•Test leads, including crocodile clips, must be in good order,
clean and have no broken or cracked insulation.
•Ensure that hands remain behind guards of probes/clips when
testing.
•U.K. Safety Authorities recommend the use of fused test leads
when measuring voltage on high energy systems.
NOTE
THE INSTRUMENTS MUST ONLY BE USED BY
SUITABLY TRAINED AND COMPETENT PERSONS
Users of this equipment and/or their employers are reminded that
Health and Safety Legislation require them to carry out valid risk
assessments of all electrical work so as to identify potential
sources of electrical danger and risk of electrical injury such as
from inadvertent short circuits. Where the assessments show that
the risk is significant then the use of fused test leads constructed
in accordance with the HSE guidance note GS38 ‘Electrical Test
Equipment for use by Electricians’ should be used.
Symbols used on the instruments are:
Caution, risk of electric shock.
Caution, refer to User Guide.
Equipment protected throughout by
Double Insulation (Class II).
Equipment complies with current EU Directives.
Equipment must not be connected to
installations >500V.
>500V
GENERAL DESCRIPTION
The Megger BMM2000 Series instruments are battery
powered Insulation and Continuity testers, with a measurement
capability from 0,01Ω Continuity to 200GΩ Insulation.
Offering multi-voltage facilities, the instruments take full
advantage of microprocessor technology and feature a large
liquid crystal display combining digital and analogue readings.
The analogue display has the benefit of indicating trends and
fluctuations in readings, while the digital readout gives direct
accurate results. The display is also backlit giving clear visibility
even in low light conditions.
The BMM2000 Series instruments have the unique capability of
being able to measure voltages down to a resolution of 0,1mV.
This gives the user the option to fit a wide variety of
transducers to further enhance the capabilities of the BMM
Series instruments, eg temperature or humidity measurement.
A customised connector on the top of the instrument enables
the optional Switched Probe to be used for twoMegger SP6F
handed probe operation.
The 250V, 500V and 1000V ranges can be used to test
electrical installations in compliance with BS7671 (16th Edition
IEE Wiring Regulations) IEC364 and HD384, since each range
has a 1mA minimum test current at the minimum pass values
of insulation specified in these documents. The 100V range is
ideal for testing telecommunications equipment which would be
damaged by higher voltages. The 50V range is useful for
testing sensitive equipment, such as electronic components,
and computer peripherals.
The BMM2000 series instruments have a current facility which
enables up to 500mA to be measured, (not ESD models), this
together with Ω, V and mV ranges means that the instrument can
realistically be used in situations where previously a multimeter
would be needed.For higher currents an optional current clamp is
available.
Designed to IEC1010-1 the BMM2000 Series are protected
against connection to a 500V Category III supply. The
instruments have a basic accuracy of ±2% at 20°C. The
instruments are waterproof and dustproof to IP54. This helps
maintain accuracy and ensures maximum reliability in harsh
environments.
OPERATION
Refer to Safety Warnings before using the instrument
Testing is automatically inhibited if:
• An external voltage >25V is present when switched to any
insulation range position.
• An external voltage >10V is present on all other ranges
(excluding ).OFF/V
The external voltage is indicated on the display, on insulation
ranges an audible bleeper will sound if a test is attempted.
Live Circuit Warning
When more than 25V (10V on 10V insulation range) is applied
to the terminals in the insulation ranges, the instrument defaults
to a voltmeter and gives an audible warning if a test is
attempted.On all other switch positions except OFF/V when
approx 10V is applied the default voltmeter will be activated.
Testing will be inhibited.
Voltage Testing on High Energy Systems
Use extreme care when using or measuring voltages above
30V, particularly in high energy systems. Fused test leads are
available as optional accessories for local situations where
increased protection is required.
Auto-shut Off
To conserve battery life, Auto-shut Off (preceded by a series of
bleeps) operates after approx. 10 minutes of instrument
inactivity on insulation, 5 minutes on all other ranges. If the
instrument is switched on whilst holding the key, the
Auto shut-off time is extended to 60 minutes. To restore
operation after Auto-shut Off, either select OFF followed by the
required switch position.
Note: It is recommended that the instrument is switched to the
OFF position when not in use.
Backlight
The backlight is activated by pressing the key. The
backlight will remain illuminated for approx. one minute before
automatically switching off to conserve battery life, alternatively
the key can be re-pressed.
Insulation Tests (MΩ) (See fig. 1)
The insulation tests apply a known voltage to the circuit under
test and measure the resulting leakage current. The circuit
under test completely de-energised and isolatedmust be
before test connections are made.
Insulation tests are only initiated when the button isTEST
pressed.
1. Set the range switch to the test voltage required.
2. Connect the test leads, first to the instrument, and then to
the isolated item under test.
3. Press the button to activate the test voltage. TakeTEST
the reading.
4. Release the button at the end of the test. TEST
5. Any capacitive circuits charged during a test will automatically
discharge. If significant voltage remains the voltage warning
will occur and the voltage present displayed.
6. Remove the test leads only when no voltage is indicated.
Locking Test Button (ltb)
When it is desired to do a long insulation test, the test can be
‘locked on’ by pressing the key while the test button is
held down. The warning will appear on the display and
both buttons may be released whilst the test continues. The
next press of the test button will terminate the test.
∼
∼
Produktspecifikationer
| Varumärke: | Megger |
| Kategori: | Multimeter |
| Modell: | BMM2000 |
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