Megger BMM80 Series User Manual
Megger BMM80 Series User Manual

Megger BMM80 Series User Manual

Insulation multimeters

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M BMM80 Series
Safety Warnings and Precautions must be read and
understood before the instrument is used. They must be
observed during use.
The circuit under test must be de-energised and isolated
before connections are made except for voltage measurement.
Circuit connections must not be touched during a test.
After insulation tests, capacitive circuits must be allowed to
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 must be of the correct type and rating.
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.
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:
>500V
Insulation Multimeters
User Guide
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.
WARNINGS
NOTE
SAFETY

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Summary of Contents for Megger BMM80 Series

  • Page 1 M BMM80 Series Insulation Multimeters User Guide SAFETY WARNINGS Safety Warnings and Precautions must be read and • understood before the instrument is used. They must be observed during use. The circuit under test must be de-energised and isolated before connections are made except for voltage measurement.
  • Page 2: General Description

    A customised connector on the top of the instrument enables the optional Megger SP6F Switched Probe to be used for two- handed probe operation. The 250V, 500V and 1000V ranges can be used to test...
  • Page 3 Live Circuit Warning When more than 25V is applied to the terminals in the insulation ranges, the instrument defaults to a voltmeter will give an audible warning if a test is attempted. On all other switch positions except OFF/v/mV when more than 10V is applied the default voltmeter will be activated.
  • Page 4 1 minute. The test can be run at any voltage. More detailed information on PI Testing and value assessment can be found in Megger Limited publications listed in the Accessories page. Automatic Discharge When the TEST button is released after an insulation test (or re-pressed if ltb feature is enabled), a 200kΩ...
  • Page 5 will not be activated when connected to a diode. Set the selector switch to Ω. Connect the test leads. The test will activate automatically. After test probes disconnected, the reading will be held for a few seconds. Zeroing of Test Lead Resistance FIG.1 The resistance of the test leads can be nulled on the continuity range (up to...
  • Page 6 ‘Low’ probe. This simplifies instrument control and two-handed probing. The SP6F is suitable for use with Megger insulation test instruments up to 1kV output test voltage. Safety: Meets the safety requirements for double insulation to...
  • Page 7: Specification

    and 500V phase to phase. The probe is fitted with an internal non-replaceable fuse to protect the user should the probe be used accidentally in conjunction with a test lead in the low terminal. * Relates to transient overvoltage likely to be found in fixed installation wiring.
  • Page 8 CONTINUITY Measuring Range: 0,01Ω to 99,9Ω (0 to 10Ω on analogue scale) EN61557 Operating range: 0,10Ω to 99,9Ω Accuracy: ±2% ±2 digits Open circuit voltage: 5V ±1V Test current: 210mA ±10mA (0-2Ω) Zero offset at probe tips: 0,10Ω typical Lead resistance zeroing: Up to 9,99Ω...
  • Page 9 these tables enables this to be done quickly and easily. These will guarantee that the value being measured is greater than or less than the limit value specified as appropriate. Insulation Resistance – MΩ Limit Min.Indicated Limit Min.Indicated Reading Reading 0,10 0,14 2,00...
  • Page 10: Power Supply

    FUSE 500mA (F) 500V, 32x 6mm Ceramic HBC 10kA minimum. E.M.C. The instruments meet EN 61326-1. POWER SUPPLY Battery Type: 6x1,5V Alkaline cells IEC LR6 type or 1.2V NiCd re-chargeable cells. Battery Life (typical): 2100 5-sec 1kV insulation tests 3200 5-sec 500V insulation tests 4000 5-sec 250V insulation tests 2700 5-sec continuity tests 4700 5-sec kΩ...
  • Page 11: Repair And Warranty

    Approved Repair Companies A number of independent instrument repair companies have been approved for repair work on most Megger instruments, using genuine Megger spare parts. Consult the Appointed Distributor/Agent regarding spare parts, repair facilities and advice on the best course of action to take.
  • Page 12 This instrument is manufactured in the United Kingdom. The company reserves the right to change the specification or design without prior notice. Megger is a registered trademark Part No 6172-427 – Edition 6 – Printed in England – 0207 www.megger.com...

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