Description
The MTD20KWR digital earth tester allows for the measurement of earth resistances, soil specific resistivity, and spurious voltages caused by parasitic voltages present in the soil.
This equipment is ideal for fast and easy measurement of grounding resistance in residential and industrial buildings, hospital installations, lightning rods, antennas, substations, and more. The soil resistivity measurement enables soil stratification, optimizing complex grounding systems engineering.
With a state-of-the-art system of active and passive filters, it provides high immunity to electrical interferences, ensuring reliable measurements even in areas with spurious voltages, such as urban settings or near primary substations.
An internal 1,470 Hz generator injects alternating current into the soil through an auxiliary rod. The apparatus measures the voltage generated over the earth resistance and evaluates the resistance value, with the test current being automatically regulated.
The display provides abnormality indications, alerting the operator when the generated current is insufficient for reliable measurements.
With a wide measurement range (from 0.01 Ω to 20 kΩ), this device is suitable for reliable testing in all soil types, including those with high resistivity.
This earth tester comes equipped with a rechargeable internal battery, and its smart charger is microprocessor-controlled. It can be powered from a 12 V car battery or similar source.
Housed in a sturdy, portable cabinet with IP65 protection (closed lid), the device is designed for operation under harsh geographical and environmental conditions. It performs reliably in extreme temperatures, whether in cold or tropical regions, or at high altitudes, making it well-suited for fieldwork.
Technical Specifications
Application
Measurement of grounding resistances (3 terminals), soil resistivity (4 terminals), and spurious voltages in the soil.
Resistance Measurement Method
The device injects electronically stabilized current into the soil and measures the voltage generated by grounding diffusion resistances. The resistance value is displayed.
Operation as a Voltmeter
In voltmeter mode, the device operates as a conventional AC voltmeter, enabling the detection and measurement of voltages generated by parasitic currents.
Measurement Ranges
Resistance: 0 - 20 kΩ.
Voltage: 0 - 200 V~.
Accuracy
Resistance and Resistivity Measurements:
± 2% of the measured value ± 2 digits
Voltage Measurement:
± 2% of the measured value ± 2 digits
Reading Resolution
0.01 Ω in resistance measurement;
0.1 V in voltage measurement.
Output Power and Current
Output power is less than 0.5 W, and the output current is limited to less than 10 mA (max.).
Power Supply
Internal rechargeable NiMH battery or 12 V external battery.
Battery Charger
The smart, microprocessor-controlled circuit optimizes battery charging to ensure maximum service life. It can be powered by an external AC adapter (included) or a 12 V car battery.
Operating Temperature
14 °F to 122 °F (-10 °C to 50 °C).
Storage Temperature
-13 °F to 158 °F (-25 °C to 70 °C).
Humidity
95 % RH (non-condensing).
Equipment Weight
Approx. 3.3 lb (1.5 kg).
Dimensions
8.70" x 7.44" x 3.90" (221 x 189 x 99 mm).
