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Megger MIT300 Insulation & Continuity Tester
  • Megger MIT300 Insulation & Continuity Tester
  • Megger MIT300 Insulation & Continuity Tester
  • Megger MIT300 Insulation & Continuity Tester

Megger MIT300 Insulation & Continuity Tester

Megger approved distributor and service centre.

Includes: test lead set, crocodile clips and MIT300 User Manual.

£352.75 Save 15%
Tax excluded
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Combining both Insulation testing and continuity testing, the Megger MIT300 caters for all aspects of fixed wiring installations. The MIT300 features 250 & 500V insulation ranges, audible continuity test and a safety interlock system which prevents unsafe connection of test leads.

In line with other products in Megger's comprehensive contractor range, MIT300 insulation testers feature rugged construction, with an impact-resistant rubber-overmoulded case, and innovative circuitry which guarantees high accuracy combined with stability of calibration.

All instruments in the MIT300 range provide indication of insulation resistance up to 999Mohms, 200mA continuity testing, a fast-reacting continuity buzzer, and facilities for nulling the resistance of the test leads. The entry-level MIT300 offers insulation test voltages of 250V and 500V, while the remaining models allow testing at 250V, 500V and 1,000V.


Digital and analogue LCD bar graph display.
Megger Intelligent Safety System built in.
250 V and 500 V insulation testing.
Test range of up to 999 MΩ.
Continuity testing to 100 Ω to continuity buzzer.
Voltage warning.
Locking test button.
Auto powerdown.
IP54 weatherproofing.

Megger MIT300 Specifications
Insulation voltage 250 V & 500 V.
Nominal Test Voltage MIT310: 310 A, 320, 330: 1000 V, 500 V, 250 V (DC)
MIT300: 500 V, 250 V (DC).
Measuring Range 10 kΩ to 999 MΩ on all ranges.
Short Circuit Current 1.5 mA nominal.
Test Current on Load 1mA at min. pass values of insulation (as specified in BS7671, HD 384 and IEC 364).
Accuracy (at 20°C) MIT300, 310, 320, 330: ±3% ± 2 digits up to 10 MΩ, ±5% up to 100 MΩ, ±30% up to full scale
MIT310 A: <2.5% of scale length (or 30% of reading 200 kΩ to 10 MΩ).
Measuring Range 0.01 Ω to 99.9 Ω (0-50 Ω on analogue scale).
Open Circuit Voltage 5 V ± 1 V.
Short Circuit Current MIT300, 310, 320, 330: 205 mA + 10 mA -5 mA
MIT310A: 200-250 mA.
Continuity Accuracy MIT300, 310, 320, 330: ±3% ± 2 digits
MIT310A: ±2.5% of scale length (or 30% of reading 0.2 to 2 kΩ).
Measuring Range 0-2/20/200/2 kΩ.
Open Circuit Voltage 1.5V ± 0.5 V.
Zero Offset Adjust MIT300, 310, 320, 330: 0 - 9Ω
MIT310A: 0 to 0.5 Ω.
Continuity Buzzer MIT300, 310: operates at <5 Ω
MIT 320, 330: adjustable from 1 Ω to 20 Ω
MIT310A: operates at <5 Ω
MIT300, 310, 320, 330: response time <20 ms
MIT310: response time <100 ms.
Resistance Range (MIT320/330)
Measuring Range 10 Ω to 1 MΩ.
Open Circuit Voltage 5 V.
Short Circuit Current 1.5 mA.
Accuracy (at 20°C) ±5 ± 2 digits up to 100 kΩ.
Measuring Range (MIT310A) 0 to 2 kΩ (refer to continuity).
Voltage Range
Measuring Range 0 to 600 V AC (50/60 Hz) or DC.
Accuracy (at 20°C) MIT310, 320, 330: DC or AC (50/60 Hz): ±1% ± 2 digits
MIT310A: ±2.5% of scale length for 50/60 Hz.
Temperature Coefficient <0.1°C per °C on all ranges.
Default Voltmeter
MIT310, 320, 330 >25 V AC or DC is applied display will operate as a voltmeter.
MIT300 Beeps and flashes V on the display.
MIT310A All modes including OFF.
Test Inhibit If more than 50 V is detected testing will be inhibited.
Power 8 x 1.5 V cells IEC LR6 type(AA alkaline)
Rechargeable NiCd or NiMH cells may be used.
Battery life
5000 consecutive tests (5 seconds per test) on any test using 2Ah batteries.
EMC In accordance with IEC61326-1.
Dimensions 203 x 148 x 78 mm (8 x 5.7 x 3.2 inches).
Weight 980 g.
Megger MIT300 warranty 3 years.


Megger MIT300 Datasheet

PDF Specifications of the Megger MIT300, MIT310, MIT310A, MIT320 & MIT330 Insulation & Continuity Testers.

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