Megger MIT481 Telecommunications Insulation Tester

Insulation tests voltages from 50V to 1000V and a selectable at continuity test current of either 20mA or 200mA. ideal for telecoms engineers with cable length by capacitance measurement & data storage.
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Megger MIT481 50V to 1000V Insulation and Continuity Tester

This product has now been discontinued and replaced by the Megger MIT481/2 Insulation Tester.

The Megger MIT481 Telecoms Insulation and Continuity Tester has been designed specifically for the telecommunications industry. The Megger MIT481 insulation & continuity tester offers an increased insulation testing range from 50V to 1000V and continuity testing at 200mA or 20mA is provided with TRMS & DC voltage measurement and a combined analogue and dual digital display. The MIT480 series is a direct replacement for the BM80 series that offers greater functionality and application range with simplified operation. In addition the Megger MIT481 is capable of saving test results for recall to the screen. A simple storage structure allows for a test number and screen results to be recalled individually. This telecoms insulation tester also has a leakage current display, frequency measurements, capacitance and cable distance by capacitance.

The Megger MIT481 use a patented analogue arc display which shows essential charge and discharge characteristics not visible on a digital display. The single pointer needle response mimics a moving coil meter and the logarithmic display is used for improved low insulation value measurements. A dual digital display is also employed by the MIT480 insulation tester. The large main digital readout offers good visibility for all main measurements while the second digital display is used for additional data such as insulation test voltage, insulation leakage current, frequency and test mode.

The MIT 481 is designed to be exceptionally safe to use with fast detecting circuitry to prevent damage if accidentally connected to live circuits or across phases. In addition the Megger telecoms insualtion & continuity tester has a default display of live circuit voltages on all ranges with detection and inhibit functions even if the protection fuse has failed. The unit meets the international requirements of IEC1010-2 and EN61557 with a CAT IV 600V rating.

What's In The Box?

  • Megger MIT481 Insulation & Continuity Tester
  • Hard case
  • Switched probe
  • Test leads with probes and croc clips
  • Rubber boot with stand
  • Calibration certificate
  • Information CD
  • Batteries

For detailed specifications please see the Megger MIT481 pdf Megger MIT480 Insulation and Continuity Tester

Insulation Testing

  • 50V - 1000V insulation test voltages available.
  • Test Lock to lock insulation test on continuous.
  • Timed insualtion testing available.
  • Actual test voltage is displayed on the smaller digital readout.
  • Insulation result on the larger digital display.
  • Insulation leakage current display.
  • Analogue arc display to replicate the response of a moving coil display.
  • Insulation testing up to 200GΩ
  • High quality flexible silicone test leads prevent measurement errors on higher GΩ ranges.
  • Test inhibit prevents insulation testing if voltages in excess of 75V are detected.
  • Insulation buzzer can be set to buzz if the insulation resistance is above a preset limit.

Continuity & Resistance

  • Auto test on circuit contact.
  • 200mA or 20mA continuity test currents are available.
  • 20mA will considerably increase battery life.
  • Lead resistance compensation (null) operates up to 9.99Ω of resistance.
  • Buzzer selected by simple push button
  • Adjustable continuity buzzer limit alarm from 1Ω to 20Ω in 5 steps.
  • kΩ range extends resistance measurement to 1MΩ.

Capacitance Measurement

  • Auto ranges from 0.1 nF to 10 μF. Results are displayed on the primary digital display.
  • Cable length is displayed on the secondary display.
  • Cable length is calculated from an adjustable cable capacitance reference (default 50 nF/km).
  • Cable capacitance reference calculation is adjustable from 40 nF/km to 60 nf/km.
  • Can display results in kn or feet.

Voltage & Frequency

  • Suitable for use on circuits up to 600 V CAT IV.
  • AC voltage measurement is True RMS up to 600 V.
  • DC Voltage measurement to 600 V.
  • Auto-ranging from 10mV to 600V provides wide range of applications and suitable for transducer inputs
  • Default voltmeter is activated on any test function if a circuit voltage is detected