AVO Biddle Megger BMM80 Digital Insulation Tester Meter

The Megger® BMM80 Insulation Multimeter builds on the renowned features of the BM80. Advanced microprocessor technology provides a host of new features not normally associated with standard insulation and continuity testers.

The instrument utilises a large backlit LCD display incorporating a patented analog arc which incorporates the benefits of electronic analog indication and unambiguous digital readings. The analog scale provides rapid identification of insulation condition highlighting any variable readings and is complemented by the precision and simplicity of the digital display.

The BMM80 provides the ideal mix of features for Telecom usage or for the electrical contractor requiring the top performance and functionality but without the need for data storage and download.

The instrument features five insulation test voltage ranges, (50 V, 100 V, 250 V, 500 V and 1000 V), In compliance with BS7671, IEC364, HD38 and VDE0413 Parts 1 and 4, the 250 V, 500 V and 1000 V ranges have a 1 mA test current at the minimum pass levels specified. Insulation measurements extending up to 200 G-ohm may be made. A live circuit warning is included to guard against inadvertent connection of the instrument to a live supply. Voltage in excess of 25 V will trigger the warning indicator.

A hands free 200 mA continuity test range meeting the requirements of European legislation is also included to ensure the accurate measurement of ring circuit final conductors and primary and supplementary bonding. The range has a facility to null the resistance of the test leads ensuring that the measurement displayed is due entirely to the conductors under test. A continuity buzzer is incorporated and sounds when resistance’s below approximately 5 ohms are encountered.

The insulation and continuity ranges are augmented by a number of features only to be found on a dedicated multimeter. The BMM80 series includes autoranging voltage measurement up to 500 V a.c./d.c., resistance measurement from as low as 10 M-ohm up to 10 M and a capacitance range extending to 10 µF.

By incorporating all the above features into a single unit the BMM80 can in many cases remove the need to carry a separate multimeter. In addition, for assistance in awkward situations a remote control switched probe, (Megger SP1), is also included enabling the instrument to be controlled from a probe mounted test button.

The BMM80 has been designed to withstand the day to day handling and storage of a toolbag environment and comes complete with a durable test and carry case with strap, removable lead storage compartment and instrument hanging facilities. The BMM80 is backed by a three year manufacturers warranty.

The BMM80 features special mV ranges with an offset null facility, enabling connection of any transducer with a mV output. Such devices extend the range of possible measurements almost endlessly including such items as temperature probes, airspeed indicators and high current clampmeters thus extending the scope of the BMM80 into key industries such as Heating and ventilation (HVAC), and Servicing.