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Megger MIT420/2 CAT IV Insulation Resistance Tester

Megger
SKU: MEGGERMIT420/2
  • Insulation resistance voltages of 50, 100, 250, 500, and 1000V, providing measurements up to 200GΩ
  • The MIT420/2 can be used as an ohm-meter to measure resistance across a range of 0.01 to 999kΩ
  • All models in the MIT4XX/2 offer live circuit detection, which prevents incidents from happening
More Info
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Megger MIT420/2 CAT IV Insulation Resistance Tester

The Megger MIT420/2 Insulation Tester (1004-739) can be used for a wide range of testing applications including avionic system tests, military (land, marine and air communications), production line, electrostatic measurements and electronic component testing amongst many other areas.

Featuring insulation resistance output voltages of 50, 100, 250, 500 and 1000V, providing measurements up to 200GΩ, the Megger MIT410/2 also features a variable range that allows the exact test voltage to be selected from between 10V and 1000V that is accurate to -0% +2%. The instrument can be used to carry out polarisation index (PI) and dielectric absorption ratio (DAR) diagnostic tests.

The Megger MIT 420/2 can be used as a low resistance ohm-meter to measure resistance across a range of 0.01 to 999kΩ, with an auto-null allowing a resistance of up to 10Ω to be zeroed prior to testing. Furthermore, the Megger MIT 420/2 insulation tester features a bi-directional test current that will reverse polarity of the test without having to switch test leads. The MIT 420/2 can also measure capacitance (electrical charge) between 0.1 nF and 10 μF.

All models within the MIT4XX/2 range offer a live circuit detection, that prevents measurements from being conducted on live circuits, protecting the instrument and user from potential danger.

The Megger MIT420/2 features an internal memory capable of storing up to 1000 records. These test measurements can be re-called at a later date making this an ideal instrument for diagnosing, repairing and checking faulty electrical systems.

Sealed to IP54, providing a weatherproof case to reduce the chances of water ingress, including the battery and fuse compartment. Rubber over-moulding combines a shock absorbing outer layer with excellent grip

The Megger MIT4XX/2 models officially replace the special application insulation testers that were the MIT400, MIT410, MIT420 and MIT430. The main benefits of the new series include:

  • Over voltage limit of 2% - rather than the industry standard of 10-20%; ultimately reducing the chance of damage to circuits and components;
  • Variable test range (MIT420/2 and MIT430/2 only) – an exact and stable test voltage can be selected from between 10V and 1000V.
  • New redesigned carry case, back stand and 6 cell battery compartment with separate access to user-serviceable fuses.

Supplied with red and black silicone test leads (with probes and clips), SP5 switch probe for remote testing, owners information CD, 6 x AA batteries and a hard carry case.

Megger MIT420/2 key features:

  • Over voltage limit of 2%
  • 50V, 100V, 250V, 500V or 1000V insulation resistance test voltages
  • Variable output voltage between 10V and 1000V

What's In The Box?

  • Red Lead 1.25m complete with probe
  • Black Lead 1.25m complete with probe
  • Red Croc Clip
  • Black Croc Clip
  • SP5 switch probe
  • Instrument Rubber Boot
  • Calibration Certificate
  • Owner's CD
  • Hard carry case
  • Batteries
Specification

Test Voltage

  • MIT400/2: 250V, 500V, 1000V
  • MIT410/2, 420/2, 430/2: 50V, 100V, 250V, 500V, 1000V

Insulation Accuracy

  • 50 Volts: 0 GΩ ± 2% ± 2 digits ± 4.0% per GΩ
  • 100 Volts: 20 GΩ ± 2% ± 2 digits ± 2.0% per GΩ
  • 250 Volts: 50 GΩ ± 2% ± 2 digits ± 0.8% per GΩ
  • 500 Volts: 100 GΩ ± 2% ± 2 digits ± 0.4% per GΩ
  • 1000 Volts: 200 GΩ ± 2% ± 2 digits ± 0.2% per GΩ

General Specifications

  • Display Range: Analogue, 1GΩ full scale
  • Resolution: 0.1 kΩ
  • Short Circuit/Charge Current: 2 mA +0% -50% to EN 61557-2 (2007)
  • Open Circuit Voltage Insulation: -0% +2% ± 2V
  • Test Current: 1mA at min. pass value of insulation to a maximum of 2 mA max.
  • Leakage (not MIT400/2): 10% ±3 digits
  • Voltage: 3% ±3 digits ±0.5% of rated voltage
  • Timer Control (not MIT400/2): 60 second countdown timer
  • Note: Above specifications only apply when high quality silicone leads are being used
  • Continuity Measurement: 0.01 Ω to 1000 kΩ
  • Continuity Accuracy:
    ± 3% ± 2 digits (0 to 100Ω)
    ±5% ±2 digits (100 to 500kΩ)
    (500kΩ to 1MΩ unspecified)
    Service Error: BS EN 61557-4 (2007) - ± 2.0%, 0.1 Ω - 2 Ω ± 6.8%
  • Open Circuit Voltage: 5V ± 1V
  • Test Current: 200mA (-0mA + 20mA) (0.01Ω to 4Ω)
  • Polarity (not MIT400/2): Single polarity (Default)/Dual polarity (configurable on setup)
  • Lead resistance: Null up to 9.00Ω

Voltage

  • Voltage Range:
    AC - 10mV to 600V TRMS sinusoidal (15Hz to 400Hz)
    DC - 0 to 600V
  • Volt Range Accuracy:
    AC - ±2% ±1 digit
    DC - ±2% ±2 digit
    Service Error BS EN 61557-1
    (2007) - ±2.0% ±2d, 0V
    300V AC/DC ±5.1%
  • Waveform:
    Unspecified range - 0-10mV (15 to 400Hz)
    For non-sinusoidal waveforms additional specifications apply non-sinusoidal waveforms (±3% 2 digits>100mV to 600V TRMS) (±8% ± 2 digits 10mV to 100 mV TRMS

    • General Specifications

    • Frequency Measurement Range: 15Hz - 400Hz
    • Frequency Measurement Accuracy: ±0.5% ± 1 digit (100Hz to 400Hz unspecified)
    • Capacitance Measurement (MIT420/2 and 430/2): 1 nF to 10nF
    • Capacitance Measurement Accuracy: ±5.0% ± 2 digits (0.1nF - 1nF unspecified)
    • Storage Capacity: >1000 test results
    • Data Download: Bluetooth Wireless, Bluetooth Class II (MIT430/2 Only)
    • Range: up to 10m
    • Power Supply: 6 x 1.5V cells type IEC LR6 (AA, MN1500, HP7, AM3 R6HP) Alkaline 6 x 1.2 V NiMH rechargeable cells may be used
    • Battery Life: 3000 insulation tests with duty cycle of 5 sec OFF @1000V into 1MΩ
    • Charger (Optional): 12-15V DC (accessory interface)
    • Dimensions: Instrument 228mm x 108mm x 63mm (9.00 in x 4.25 in x 2.32in)
    • Weight: 600g (MIT400/2), (1.32lb)
    • Weight (instrument and case): 1.75kg (3.86lb)
    • Fuse: Use only 1 x 500mA (FF) 1000V 32 x 6 mm ceramic fuse of high breaking capacity HBC 30kA minimum. Glass Fuse. MUST NOT be fitted