Earth resistance and resistivity meters

The AMRU-30 is an ergonomic and simple instrument with a large number of measuring functions. It allows most of the known resistance measurement methods of earthing to be used, so the application range of this device is very wide. The instrument has double insulation, CAT III 300V measurement category and IP65 protection.

Earth resistance and resistivity meter AMRU-30

The equipment has double electrical insulation, following EN 55761 and IEC 61557. The measuring category is CAT IV 300V according to EN 61010-1, and the degree of protection of the housing is Ip54 according to EN 60529.

Earth Resistance and Resistivity Meters AMRU-21

The AMRU-20 is a device that allows to measure the earthing by the 2 or the 3 pole. With this equipment we can also measure the continuity of the equipotential protection connections with a current of 200 mA (complies with IEC 61557-4)

Earth Resistance and Resistivity Meters AMRU-20

Short-circuit loop measurement ; Testing of general and selective RCD with the rated differential current ; Measurement of insulation resistance ; Up to 10GΩ ; Voltages: 50 V, 100 V, 250 V, 500 V, 1000 V ; Measurement of earthing resistance ; Bi-directional testing of PE wire continuity ; Phase sequence testing ; Measurement and recording of voltage, frequency, AC, cosφ, power, harmonics, THD and more...

Multifunction Electrical Installations Meter AMPI-530

Short-circuit loop measurement: Impedance measurement with 23A (44A phase-to-phase) short-circuit resistor RZW =10Ω, Measurement range: 95...440V, frequency 45...65Hz and much more

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The AMPI-520 multifunction meter is ideal for diagnostic purposes in accordance with the IEC 61557 standard. It is designed to measure and record a number of parameters, such as AC voltage, current, frequency, power, etc.

Multifunction electrical Installations Meter AMPI-520

The AMRU-120 Earth Resistance and Resistivity Meter allows measurement of resistance of ground connections using auxiliary electrodes, resistance of ground connections using using auxiliary electrodes and clamps (for measuring connections to multiple grounds), soil resistivity (using Wenner method) etc. according to EN 61010-1 and IEC 61557

AMRU 120

It is the only meter in the market which uses all measurement methods: Earth resistance measurement with 2-pole, 3-pole, 4-pole method. Impulse earth impedance measurement, two kinds of measuring impulse 4/10μs, 10/350μs. Earth resistance measurement without disconnecting measured earths (using clamp). Earth resistivity measurement

Earth Resistance and Resistivity Meters AMRU-200

Applications of Earth resistance meters

General information on the extent of resistance grounding and Resistance Testers applications.

Summarily presents some measurement concepts about grounding systems.

A good grounding system is necessary to maintain the safety of persons working or in contact with the facilities and to maintain optimal operating conditions in the various powered equiments.The various measures are made of ground and soil resistivity are designed to ensure this, not only in normal operating conditions, but also to any circumstances that override the isolation of the lines.

There are two important parameters when designing or performing the maintenance of a Ground: The ground resistance (measured in ohms, Ω) and soil resistivity (measured in ohm meters, Ωm).

Resistivity is a fundamental parameter in the design of earthing systems. Resistivity is an intrinsic characteristic of the soil, is independent of the morphology but depends on the humidity or temperature. Varies throughout the year. The presence of water in the soil does not necessarily imply a low resistivity.

Because the resistivity of soil varies considerably by soil type and seasonal parameters depending on the system should be designed for the worst possible conditions.

Low resistivity soils are often corrosive as they are rich in moisture and salts, this implies the need for the use of earth resistance tester for regular monitoring of the grounding system.

In that sells manuals Amperis Resistance Testers, describes several systems for measuring ground resistance and ground resistivity. Connections are displayed graphically, allowing assimilation intuitively.

It also has many articles about teaching and can be of great help, learn more in our new section Resources - Engineering - Measure resistance grounding