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Megger MIT330 Insulation & Continuity Tester
  • Megger MIT330 Insulation & Continuity Tester
  • Megger MIT330 Insulation & Continuity Tester
  • Megger MIT330 Insulation & Continuity Tester

Megger MIT330 Insulation & Continuity Tester

Megger approved distributor and service centre.

Includes: test lead set, crocodile clips, SP4F Switch probe and MIT330 User Manual.

£514.25 Save 15%
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The MIT330 insulation and continuity tester from Megger is not only durable and easy to use, but also incorporates a comprehensive set of features designed to ensure operator safety, even under conditions of accidental misuse.

The MIT330 additionally offers the facility to save test results to internal memory. Over 1000 result can be saved on site, and downloaded to a computer when convenient. Data is stored in non-volatile memory, being retained when the instrument is switched off or batteries are exhausted. A Job reference number can be selected for a range of results, allowing separate locations to be tested with the same tester and easily separated when downloaded.

A memory bar graph acts as a ‘Fuel Gauge’ showing how much memory has been used. Test results are downloaded to CSV (Coma Separated Variable) spreadsheets.

If certificates or reports are required, the results can be downloaded directly into Megger Powersuite Professional with a range of features for creating professionally finished documentation.


Digital and analogue LCD bar graph display.
Megger Intelligent Safety System built in.
250 V, 500 V and 1000 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 MIT330 Specifications
Insulation voltage 250 V 500 V & 1000 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.
Results storage 1000 results.
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 MIT330 warranty 3 years.


Megger MIT300 Datasheet

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

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