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Megger MIT4812

Insulation/Continuity Tester with Storage, 50V/100V/250V/500V

Brand: Megger
Model No: MIT4812
Our Model No: MIT4812
Condition: NEW
PDF Document Icon Data Sheet (201 KB)

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Product Features:

  • Performs insulation testing up to 500 V and 100 Gigaohms range
  • Three-wire connection for A, B and E (Tip, Ring and Ground) test leads
  • Gated access to 500 V operation helps prevent accidental damage
  • Differential measurement capability between two consecutive continuity tests
  • Single range, faster continuity testing from 0.01 ohm to 1 Megaohm
  • Stabilized test voltage remains within specification throughout full test range
  • Display provides combination of analog arc and dual digital readout
  • On-board memory stores up to 1000 test results
  • Detects and prevents testing on live circuits above user-selectable thresholds
  • Measures voltage up to 600 V TRMS AC and DC
  • Offers rechargeable options for mains and car charging
  • Suitable for use on at CAT IV 600V applications
  • Rated to IP54

The Megger MIT481/2 (1006-752) Insulation and Continuity Tester replaces the original MIT480 and is designed specifically for the Telecommunications and Cable testing markets. The tester features a redesigned case, back-stand, and 6-cell battery compartment with separate fuse access. It is over-molded for increased protection and to achieve an IP54 weatherproof rating.

Three Terminal Connection:

Three terminal measurement permits the connection of all three test leads for A, B and E (or Tip, Ring and Ground). The measurement pair is selected from the A-B-E (T-R-G) button on the front panel. Selection is confirmed in the display. No disconnection of test leads to measure individual pairs is required.

Insulation Resistance Testing:

The feedback-controlled insulation test voltage is now accurate to +2% -0% compared to the original +20%, providing a more accurate test voltage without the risk of over-voltage damage to circuits. A variable range allows the exact test voltage to be selected from 10V up to 500V.

Features Include:

  • Test voltages - 50 V, 100 V, 250 V, and 500 V.

  • Variable test voltage - Adjustable test voltage from 10 V to 500 V.

  • 2% test voltage accuracy - The output test voltage is maintained within the tolerance or 0% +2% +2 V

  • PASS/FAIL indication - PASS or FAIL displayed depending on threshold voltage

  • Stabilized test voltage - The voltage is feedback controlled to ensure it remains within specification throughout the full test range

  • Test voltage display - The actual test voltage is displayed on the smaller digital readout, with the measurement on the larger digital display.

  • Test range - Insulation testing up to 100 GΩ @ 500 V.

  • Measurement range displayed - The test range is displayed during selection

  • Measurement voltage display - The measurement voltage is displayed during the test

  • Analog arc - The display also features an analog arc to replicate the response of a moving coil display.

  • Timed testing - Automatically test to a time limit

  • Silicone leads - High quality flexible silicone test leads are comfortable to use and prevent measurement errors on GΩ ranges above 5 GΩ.

  • Test inhibit - prevents testing if voltages in excess of 25, 30, 50, 75 or 100 V (set by the user) are detected when making insulation tests. Default is 50 V.

  • Insulation buzzer - The buzzer can be set to buzz if the insulation resistance is above a user adjustable limit, set in the Setup menu.

  • Test Lock - Holds insulation test on continuously

Continuity (Resistance) Testing:

  • Single resistance range - One range fully automatic from 0.01 Ω to 1.0 MΩ.

  • 200 mA or 20 mA - Either 200 mA or 20 mA continuity test currents are available. 20 mA test current will considerably increase battery life.

  • Lead null - Lead resistance compensation (NULL) operates up to 10 Ωs of resistance.

  • Buzzer - ON/OFF selected by simple push button.

  • Buzzer limit - Continuity buzzer limit alarm provides adjustment of the maximum resistance the continuity buzzer sounds. This is adjustable from 1 Ω to 200 Ω in 12 steps.

  • Differential measurement - Allows the difference between two consecutive continuity tests to be measured

  • REN - Displays the appropriate REN value for the circuit under test.

  • Available on 100 V ins or continuity range

Voltage Measurement:

  • True RMS voltage measurement to 600 V ac or dc with resolution from 0.1 mV.

  • Digital voltage measurement up to 600 V ac/dc

  • Analog arc measurement to 600 V ac/dc

  • Automatic display of frequency during voltage measurement.

  • Input impedance is 10 MΩ to prevent loading the circuit and reporting low voltages.

Current Measurement:

  • ø - 400 mA AC/DC

  • 1 - MIT481/2 Insulation and Continuity Tester (1006-752)
  • 1 - Set of 1 kV Silicone Test Leads with Probes and Clips (Red, Black)
  • 1 - SP5 Switched Probe (1007-757)
  • 1 - Owners Information CD
  • 6 - AA Alkaline Batteries (1002-753)
  • 1 - Hard Carrying Case (2006-649)
Model Description Buy Now Price
1002-001 Megger 1002-001 Replacement 1.4m Test Lead Set (Red, Black) with Crocodile Clips for MIT Series Add to Cart
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FPK8 Megger FPK8 (1002-015) FPK8 Fused 1.5m Test Lead Set (Red/Black) with Clips, 500 mA, for MIT Series Add to Cart
Sale $170.06
1002-735 Megger 1002-735 Rechargeable NiMH Batteries for MIT430/2 Not Available


1004-183 Megger 1004-183 12V DC Battery Charger for Models MIT2500, MIT430/2, MIT485/2 Add to Cart


1007-157 Megger 1007-157 SP5 Remote Switch Probe for MIT400/2 Series Add to Cart
Sale $138.73
1007-464 Megger 1007-464 Mains Charger Kit for Model MIT430/2 Add to Cart
Sale $110.09
Data Sheet: PDF Document Icon (201 KB)
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