MI 3290 GP Earth Analyser

Earth testers

MI 3290 Earth Analyser is a portable, battery or mains powered test instrument with excellent IP protection (IP 54 open case), intended for measurement of earth resistance, specific earth resistance and earth potential of various energetic and non-energetic objects. The user can choose between different methods from classic 3 wire earth resistance measurement up to one or four clamp method for measurement of pylons. He has a choice of measurement methods with different frequency methods: single frequency or frequency sweep from 55 Hz to 15 kHz, HF method with 25 kHz and pulse method simulating the lightning strike. High electrical noise immunity makes this instrument best suited for industrial environment. Instrument is available in multiple sets which are a combination of different accessories and measurement functions.


Standards applied

IEEE 81-2012

  • IEEE 81-2012


Measuring functions

  • Earth Resistance 2,3,4 -pole;
  • Selective Earth Resist (1 x clamp);
  • Earth Resistance (2 x iron clamps);
  • Specific Earth Resistance (Wenner and Schlumberger method);
  • HF-Earth Resistance (25 kHz, acc. to IEEE_Std 81);
  • Earth Resistance of mono pylons with 10 m flex clamp;
  • Earth Resistance of multi–leg pylons with up to four flex clamps;
  • Current measurement (Iron, flex clamps);
  • Low Ohm measurement 7 mA and 200 mA;
  • Earth Potential;
  • Step and contact measurements;
  • Impulse Earth measurement 10/350 µs.

Key features

  • Possibility of performing all types of earth measurements with a single instrument.
  • Analysis of earth impedance as a function of the frequency due to a wide measurement frequency band (55 Hz ... 15 kHz).
  • Earth measurements on pylons with protective earth cable connected.
  • Measurement on mono towers and 4-leg tower.
  • A wide variety of measuring clamps: from iron clamps to flex clamps with 10 m length.
  • HF-Earth resistance measurement (acc. to IEEE_Std 81).
  • Sweep mode Z(f) on screen.
  • High resolution colour touch screen, 4.3” TFT.
  • Floating Mains (universal 90 … 260 V AC) or battery powered (built in fast charger).
  • High degree of protection: IP 65 case closed, IP 54 case open.
  • Checkbox - different self-check methods.
  • DC resistance measurements.
  • Impulse impendance measurement for simulating the lightning strike.
  • Support for single or automated measurements.
  • PC SW for measurement pre and post processing: preparation of the test structure, result download, tree-view, table view and graphical view, storing and printing.

Technical data


  • Dimensions (w x h x l): 360 X 160 X 330 mm
  • Weight (with batteries, without accessories): 6 kg 



  • Dimensions (w x h x l): 230 X 103 X 115 mm
  • Weight (with batteries, without accessories): 1.3 kg



  • Power generation
  • Thermal energy power plants

Renewable energy sources

  • Renewable powerplants
  • Hydroelectric power
  • Wind power generation
  • Fall of potential method for solar and wind stations

Power distribution

  • Power distribution
  • Earthing resistance of pylons

Installations exceeding 1 kv

  • Specific earth resistance measurement methods
  • High and low frequencies for earth resistance measurement

Earthing and lightning protection 

  • Earthing measurement with fall of potential method

Hospital earthing and lightning protection 

  • Hospital earthing measurement with fall of potential method



Download File Language Version Release Notes Type Size View Download
Datasheet MI 3290 Earth Analyser en 2018 25.10.2018 pdf 2.39 MB
Datasheet Ion SDK and Black-Box protocol en 2020 07.10.2020 Brochure pdf 835.94 KB Login
Manual MI 3290 Earth Analyser en 1.4.5 19.12.2018 20 752 597 pdf 4.85 MB Login
Presentation MI 3290 Earth Analyser en 2017 12.05.2017 pdf 2.21 MB