Megger MIT400 Insulation and Continuity Tester Details
Important Note: the Megger MIT400 is now discontinued.
Megger has released a new version of this product called the MIT400/2.
You can view this product instead by clicking the following link.
The MIT400 is the most basic model available in Megger's MIT400 range of insulation and continuity testers. Despite this it is still a highly capable piece of test equipment and can comfortably perform 250V, 500V and 1000V test procedures with range of 5, 10 and 20GΩ.
Portable, lightweight and easy to use, the Megger MIT400 is ideally suited for use by any electrician whether you work in utilities, industrial, commercial or even in domestic applications. The device is also safety rated to CAT IV 600V and is perfectly suitable for use in high energy systems such as substation transformers and it can also be used in lower voltage applications such as in the telecom industry or on data equipment.
When carrying out insulation tests with the MIT400 the device features a number of additional features designed to enhance the test procedure and overall safety levels. It includes a test lock feature that constantly locks on the insulation test, test voltage display and simultaneous insulation readout, analogue arc display to replicate moving coils, PI and DAR functions, test inhibit when voltages of more than 50V are detected and an insulation buzzer that will sound when a defined limit is passed (can be set via the menu).
Continuity testing can be performed automatically using the Megger MIT400's auto test mode at 200mA or 20mA. This mode of testing also features lead nulling, a buzzer and a buzzer limit that's adjustable.
The Megger MIT400 meets the requirements for use on CAT IV 600V installations.
Megger MIT400 Insulation and Continuity Tester Key Features
- 250, 500 and 1000V insulation voltage range
- INS test voltage display
- Continuity measurements from 0.01 to 99.9Ω
- Variable current limit of 200mA/20mA
- Fast buzzer with selectable threshold
- kΩ range to 999kΩ
- Default voltmeter
- tRMS measurement to 600V
- Battery condition display
- Test button plus lock button
- Auto power down
Full List of Products Included
- Megger MIT400 Insulation and Continuity Tester
- Hard Case
- Red and Black Test Leads
- Probes and Clips
- 1 x Red Long Probe
- Calibration Certificate
- Owners Information User Guide CD
- Technical Specs
Megger MIT400 Series Technical Specifications
All quoted accuracies are at +20°C.
|Nominal Test Voltages|
|MIT400||250V, 500V, 1000V|
|MIT410, 420, 430||50V, 100V, 250V, 500V, 1000V|
|MIT415||10V, 25V, 50V, 100V, 250V, 500V|
|MIT40X||10V to 100V variable (1V increments)|
|Insulation Resistance Range (At Max Test Voltage)|
|Range Full Scale Accuracy||All ranges ±2% ±2 digits up to 100MΩ
1000 volts ±3% ±2 digits ±0.2% per GΩ
500 volts ±3% ±2 digits ±0.4% per GΩ
250 volts ±3% ±2 digits ±0.8% per GΩ
100 volts ±3% ±2 digits ±2.0% per GΩ
50 volts ±3% ±2 digits ±4.0% per GΩ
10 volts ±3% ±2 digits ±2.0% per 100 MΩ
|Analogue Range||1GΩ full scale
Notes: 1. All ranges measure from 0,00 MΩ upwards.
2. Above specifications only apply when high quality
silicone leads are being used.
|Short Circuit Current||2 mA +0% -50%|
|Terminal Voltage||0% +20% ±1 V
|Test Current On Load||1 mA at min. pass value of insulation specified in BS7671, HD384
and IEC364, 2 mA max.
|EN1557 Operating Range||0.10 to 1.00GΩ|
|Leakage Current Range||10μA to 2000μA|
|Leakage Current||10% ± 3 digits|
|Voltage Display||3% ± 3 digits ±0.5% of rated voltage|
|Polarisation Index (PI)||10 min/1minute ratio|
|Dielectric Absorption Ratio (DAR)||60 sec / 30 sec ratio|
|Measurement||0.01 to 99.9Ω (0 to 100Ω on analogue scale)
|Accuracy||±2% ± 2 digits (0 to 100Ω)|
|Open Circuit Voltage||5V ±1V|
|Test Current||205mA (±5mA) (0.01Ω to 9.99Ω)
20mA (±1mA) (10.0Ω to 99.9Ω)
|Zero Offset at Probe Tips||0.10Ω typical
|Lead Resistance Zeroing||Up to 9.99Ω|
|Buzzer||Variable limit 1Ω, 2Ω, 5Ω, 10Ω, 20Ω|
|Voltage Range||0 to 600V DC ±2% ±2 digits
10mV to 600V TRMS sinusoidal (40 to 400Hz) ±2% ±2 digits 0 to 1000V on analogue scale
Unspecified input level 0 to 10mV (40 to 400Hz)
For non-sinusoidal waveforms additional specifications apply:
±3% ±2 digits 101mV to 600V TRMS and ±8% ±2 digits 10mV to 100mV TRMS
|Default Voltmeter||Operates at >25V AC or DC on any range except OFF|
|Frequency||15 to 450Hz ±0.5% ± 1 digit|
|Capacitance Measurement (MIT481 and MIT485 Only)|
|Measurement Range||100pF to 10μF|
|Accuracy||±5% ± 2 digits|
|Distance by Capacitance||Arithmetic conversion from capacitance measurement on default capacitance measurement: 50nF/km|
|Capacitance Range||40nF/km to 60nF/km|
|Capacity||>1000 test results|
|Bluetooth Class||Class II|
|Range||Up to 10m|
|Power Supply||5 x 1.5V Cells type IEC LR6 (AA, MN1500, HP7, AM3 R6HP) alkaline
NiMH rechargeable cells may be used
|Battery Life||2200 insulation tests with duty cycle of 5 sec ON/55 sec OFF @ 1000V into 1MΩ|
|Dimensions (Instrument)||220 x 92 x 50mm (8.66 x 3.63 x 1.97 inches)|
|Dimensions (Instrument + Case)||456 x 178 x 89mm (18 x 7 x 3.5 inches)|
|Weight (Instrument)||590g (775g with boot)|
|Weight (Instrument + Case)||1.75kg (3.86lbs)|
|Fuse||Use only a 500mA (FF) 1000V 32 x 6mm ceramic fuse of high breaking capacity HBC 50kA minimum. Glass fuses must NOT be fitted|
|Overvoltage Safety Category||Meets IEC 61010-1 to 600V phase to earth, category IV. Refer to safety warnings supplied|
|EMC||In accordance with IEC 61326-1|
|Temperature Coefficient||<0.1°C per °C up to 1GΩ
|Operating Temperature Range and Humidity||-20 to 55°C
95% RH at 0°C to 35°
70% RH @ 35 to 55°C
|Storage Temperature and Humidity||-30 to 80°C|
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