Megger MIT2500 – 2500V Insulation Tester

Megger MIT2500 – 2500V Insulation Tester

The MIT2500 Insulation and Continuity Tester has been designed for motor and cable testing, specialist applications and electrical testing  applications, where operation voltages exceed 1000 V and higher insulation test voltages are needed.

The MIT2500 offers both fixed range voltages of 50 V, 100V, 250 V, 500 V, 1000 V and 2500 V, as well as a variable range that allows any voltage between 50 V and 2500 V to be “dialled in”. This is supported by the new test voltage feedback control, which maintains the output test voltage to within 2% of the selected range, even when under test.

The MIT2500 uses the redesigned case, back-stand, and 6 cell battery compartment, as well as incorporating a Guard terminal to reduce surface tracking currents that reduce accuracy at higher voltages.

All instruments are over-moulded for increased protection and achieve an IP54 weatherproof rating.

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 50 V to 999 V in 1 V steps, (1KV to 2.5KV in 10 V steps) providing 1100 test voltage options.

Variable Insulation Voltage (NEW)*

The variable mode provides a unique solution for awkward insulation voltage measurement applications. The range option allows an insulation test voltage from 50 V to 999 V in 1 V steps, 1.0 KV to 2.5 KV in 10 V steps.

TYPICAL APPLICATIONS INCLUDE

• Commercial Avionics
• Military Land, Marine and Air communications
• Manufacturing/production line goods
• Electrostatic measurement
• Component testing
• Battery powered traction and lifting equipment

Guard Terminal

The Guard terminal (G) is a third terminal on the connection panel. Connection of the guard terminal on certain applications provides a return path for parallel leakage currents that could otherwise create significant errors in the insulation measurement. This is especially so for surface contamination of equipment or cables.

• For voltages of 1000 V and above, or expected insulation values over 100 MΩ the guard terminal should be considered to reduce measurement error.

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
• Automatic display of frequency during voltage measurement.

Display

The display offers a combination of Analogue arc and a dual digital readout:

Analogue arc:

• Full display width analogue arc.
• Arc display shows essential charge and discharge characteristics not visible on a digital display.
• Single pointer “needle” response has a similar response to a moving coil meter.

Dual digital display

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