• Test Voltages - 250V to 1000V or 50V to 1000V
  insulation test voltages available.
• Test Lock - Locks insulation test on continuously.
• Test Voltage Display - The actual test voltage is displayed on the smaller digital readout, with
  the insulation result on the larger digital display.
• Analog Arc - The display also features an analog arc to replace the response of a moving coil display.
• PI and DAR - Polarization Index (PI) and Dielectric Absorption Ratio (DAR) functions.
• 200GΩ - Insulation testing from 20GΩ (MIT400) to 200GΩ (MIT420 and MIT430).
• Silicone Leads - High quality flexible silicone test leads are comfortable to use and prevent
  measurement errors on higher GΩ ranges.
• Test Inhibit - Prevents testing if voltages in excess of 50V are detected when making insulation tests.
• Insulation Buzzer - The buzzer can be set to buzz if the insulation resistance is above a preset
  limit, set via the Setup menu.

Continuity Testing

• Auto Test - Auto test on circuit contact enables real, two handed operation without the
  need to press the test button.
• 200mA or 20mA - Either 200mA or 20mA continuity test currents are available. 20mA test
  current will considerably increase battery life.
• Lead Null - Lead resistance compensation (NULL) operates up to 9.99Ω 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 1Ω to 20Ω in 5 steps.
• Resistance Measurement - The kΩ range extends resistance measurement to 1MΩ.

Display
The display offers a combination of analog arc and dual digital readout.

Analog Arc:

• Full display width analog arc.
• Patented arc display shows essential charge and discharge characteristics not visible on a digital display.
• Single pointer "needle" response is similar to a moving coil meter.
• Logarithmic display for better low insulation value measurements.

Dual Digital Display:

• Large main digital readout for good visibility of all main measurement results.
• Second digital display is for additional data such as : Insulation test voltage, Insulation leakage current,
  Supply frequency (when measuring voltage), and Test mode such as PI, DAR or TI (Timed mode).

Storage and Downloading Results

• MIT420 - The model MIT420 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.
• MIT430 - The model MIT430 supports both test result storage and downloading. Test results can be stored in the instrument and subsequently downloaded to a computer with the Megger download manager software.
  
  Data transfer is by Bluetooth, with the MIT430 Bluetooth transmitter being enabled when the Download mode is selected on the instrument. Note: The receiving PC needs to have Bluetooth capability or a USB port fitted Bluetooth receiver Class II (10m) is acceptable.

Safety

• Meet the international requirements of IEC 1010-2 and EN 61557.
• Live circuit detection inhibits insulation testing on circuits above 50 volts.
• Live circuit detection and test inhibit on continuity measurements.
• Default display of live circuit voltage on all ranges.
• Detection and inhibit functions even if the protection fuse has failed.
• Suitable for use on CAT IV applications and supply voltages to 600 volts.
• All MIT400 series instruments are designed to meet the safety requirements for use on CAT IV 600V.