Metrel MI3201 TeraOhm Plus 5kV Insulation Tester

This 5kV Insulation Tester offers CATIV protection and can even store and download the test data. Supplied with 3 year warranty.
More Info
Typically ships in 2-4 working days

Metrel MI 3201 5kV Insulation Tester

The new Metrel MI3201 TeraOhm 5 kV Insulation Tester is a portable instrument intended to measure insulation resistance through the use of high voltage DC test voltages up to 5 kV. The large LCD screen allows real-time R(t) graphs to be displayed. Results can be stored and downloaded to a computer via USB and RS232 connections with the help of the optional Metrel TeraLink PRO software. The high quality instrument, shielded test leads and quality accessories included in the standard set enables you to perform you testing effectively.

Key Features of the Metrel MI3201 TeraOhm:
  • Automated testing: PI, DD, DAR calculations with automated resistance ranging (AR). All data is displayed during one single measurement.
  • Fault finding: fully programmable step voltage and withstanding voltage test functions to assist in diagnosing faults in insulation.
  • R(t) graph: real time resistance against time graph plotting facility to graphically illustrate the response of a material to an applied test voltage.
  • Faster testing: high 5 mA charging current quickly charges capacitive loads.
  • Accurate: selectable noise rejection filters (up to 5 mA) and shielded cables as standard ensure accurate readings.
  • Safe: high CAT IV/600 V voltage protection.
  • Portable: lightweight 3 kg design with carry handle and shoulder strap.

Applications for the Metrel MI3201 Teraohm:

  • Testing insulation resistance of rotating machinery and cables.
  • Production line periodic testing and maintenance.
  • Troubleshooting and analysis of all kinds of insulation problems.
  • Diagnostic testing


  • Test Voltage Range 250 V - 5 kV
  • Measuring range 10 TΩ
  • Voltage steps 25 V
  • Automatic discharge after test
  • Calculation of DD, DAR, PI
  • Withstanding voltage test
  • Voltage ramp test
  • Timer
  • Leakage current measurement
  • Capacitance measurement
  • Short circuit / charge current 5 mA
  • Guard terminal
  • Auto adjustment function
  • Audible warnings
  • Auto ranging
  • Shielded test leads


  • Voltage measurement AC/DC up to 600 V AC and DC


  • Insulation 5 % + 3 d (to 1 TΩ), 15 % + 3 d (to 10 TΩ)
  • Voltage 3% + 4 V
  • Capacitance 5% + 4 nF


  • Display type LCD
  • Back light
  • Graph insulation resistance R(t)
  • Bar graph

Memory, Software and Communications:

  • USB / RS232 downloading
  • Number of memory locations 1000
  • Software Optional TeraLink PRO

Safety and Protection:

  • Safety category CAT IV/600 V

Power Supply:

  • Rechargeable batteries
  • In-built battery charger
  • Low Battery indication
  • Battery life (no load connected) 4 h ∞ 5 kV


  • Weight 3 kg
  • Size (mm) 310 x 130 x 250