MIT insulation testers

The Megger MIT insulation testers incorporate a range of features. There are four instruments in the range which are all provided with weather-proof cases, thick rubber bumper strips, colour-coded range and parameter selectors, an analog/digital large numeral value readout and 50 segment arc and pointer LCD. (Models MIT 300, MIT 310 and MIT 320).

The MIT 310A has a rugged meter movement with three easily read, clearly engraved meter scales. Important safety features have been incorporated including a safety interlock shutter which prevents unsafe connection of test leads. All MIT 3XX series insulation testers have a default volt meter (600 VAC/DC) indicating live circuits; the MIT 310 has live circuit warning operative above 25 V. The safety lockout feature of the MIT 3XX range prevents continuity testing on live circuits.

With the exception of the MIT 300 which has insulation testing ranges of 250 V and 500 V, the instruments also have a 1000 V range making them suitable for three-phase installations. The insulation resistance test range is 999 Megohm. The MIT 3XX series has continuity measurement functions and two models (MIT 310A and MIT 320) have resistance ranges. MIT 3XX series insulation testers can be comfortably hung from the neck leaving the hands free. The MIT 320 is equipped with a probe operated insulation test button.