Ground Tester MTD 20kWe

Ordernr. 61832
EAN 4260409220560
Excl. 19% VAT, excl. Shipping Cost
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Frequently Bought Together

  1. Ground Tester MTD 20kWe
  2. +
  3. Calibration Ohmmeter
Total price: €0.00

Technical Service
+49 421 277 9999


  • Operation fraquency: 1470 Hz
  • Resistance reading: up to 20 kΩ
  • Resolution: 0.01 Ω
  • Automatic current injection
  • Built-in memory and printer
  • Rechargeable battery

The MTD20KWe digital earth tester allows for the measurement of Earth Resistances and Soil Specific Resistivity, and also the spurious voltages caused by parasitic voltages present in the soil. This equipment is suitable for fast and easy measurement of the grounding resistance in residential and industrial buildings, hospital installations, lightning rods, antennas, substations, etc. Furthermore, its soil resistivity measurement capabilities allow for soil stratification modelling in order to optimize the design of highly complex grounding systems.

Its state-of-the-art system of active and passive filters provides it with high immunity to electric interferences, making it possible to obtain reliable measurements even in the presence of spurious voltages, such as the ones that can be found in some urban areas and near primary substations. A 1470 Hz internal generator injects alternated current on the soil through an auxiliary rod. The voltage generated over the earth resistance is measured by the apparatus, and the resistance value is evaluated. The test current is automatically regulated. It has an audible signal which advises the operator when the generated current is not enough to carry out reliable measurements. Due to the fact that it may not be noticed, this alarm also prevents further testing.

Because of its wide range of measurement (from 0.01 Ω up to 20 kΩ), this equipment allows for reliable testing in all kinds of soils, including those that offer very high resistivity. The use of this instrument is very simple, it has a high-visibility 3½ - digit display with direct readings, even under sunlight.

This earth tester is supplied with a rechargeable internal battery. The smart charger is microprocessor-controlled, and can be powered from a 12 V car battery (or a similar one). It has a sturdy, easy and safe to carry cabinet, with IP54 protection level (with closed lid). It is suitable to work under adverse geographical and environmental conditions, with extreme temperatures in cold or tropical regions and in high mountain areas, showing a reliable performance in the field.


  • Measurement of grounding resistances (3 terminals), soil resistivity (4 terminals) and spurious voltages present in the soil


  • The equipment injects an electronically stabilized current in the soil, and measures, with high precision, the voltage developed in the soil by means of that current flowing through grounding diffusion resistances. Display shows the Resistance value.


  • Operation frequency: 1470 Hz
  • This operation frequency complies with the equation:
    • fg = (2n+1)/2 * fi
    • Where:
      • fg = frequency of the current generated by the earth meter
      • n = integer number
      • fi = industrial frequency (50 or 60 Hz)
      • The compliance with this equation implies that the operation frequency will not coincide with any harmonic of the industrial frequency, in order to minimize the effect of parasitic currents present in the surveyed soils, by means of the use of appropriate filters


  • In the voltmeter function, the equipment operates as an AC conventional voltmeter, making it possible to check the presence and to measure voltages generated by parasitic currents


  • Resistances: 0-20 Ω; 0-200 Ω; 0-2,000 Ω and 0-20 kΩ
  • Voltage: 0-200 V~


  • Resistances measurements: ± (2% of the measured value + 1% of the maximum value of the selected range)
  • Voltage measurement: ± (2% of the measured value + 1% of end of scale value)


  • Ω in the resistance measurement
  • V in the voltage measurement


  • The output power is less than 0.5 W
  • The output current is limited to less than 15 mA (Peak to peak)


  • It makes it possible to verify the battery charge status under normal use conditions


  • It warns the operator in case that there are abnormalities in the current circuit, which make it difficult to obtain a reliable result


  • By means of an internal rechargeable battery, from a 12 V external battery


  • A smart, microprocessor controlled, circuit adjusts the battery charge to the optimized parameters in order to ensure the maximum service life. It is supplied by means of an external AC adapter (provided with the equipment) or from a 12 V car battery


  • 14°F to 122°F (-10°C to 50°C)


  • -13°F to 149°F (-25°C to 65°C)


  • 95% RH (without condensation)


  • Approx. 5.3 lb (2.4 kg) (without accessories)


  • 8.70” x 7.44” x 3.89” (221 x 189 x 99 mm)


  • Four steel rods
  • Connection wire to supply the charger with a 12 V external battery (the car battery)
  • Battery charger power supply, 100-240 V~ input voltage
  • One 131.23 ft (40 meters) cable in red color
  • Two 65.62 ft (20 meters) cable in blue and green color
  • One 16.40 ft (5 meters) cable in black color
  • One 16.40 ft (5 meters) cable to connect to the grounding system to be measured
  • Canvas bag
  • User guide