The working principle of the ground resistance test meter is divided into reference voltage comparison type,Earth Resistance Tester reference current and voltage drop type. It draws on the principle of the bridge,Earth Resistance Tester compares the measured resistance with the known resistance through the sharer, adjusts the balance,Earth Resistance Tester and directly reads the value of the measured grounding resistance through the scale on the known resistance.

If the load capacity of the current source is large,Earth Resistance Tester the grounding resistance of the current electrode C does not affect the measurement result; if the input impedance of the sampling voltage terminal is large,Earth Resistance Tester the grounding resistance of the P electrode does not affect the measurement result. Pay attention to the following precautions during use. When the sensitivity of the galvanometer of the ground resistance test meter is too high,Earth Resistance Tester the potential exploration needle can be inserted into the soil shallower. When the sensitivity of the galvanometer is not enough,Earth Resistance Tester the water can be irrigated along the potential exploration needle.

When the ground disturbance signal is strong,Earth Resistance Tester the generator speed can be changed appropriately to obtain a stable reading. When the distance between the ground electrode and the current probe is greater than 40m, Earth Resistance Tester the potential probe can be inserted within a few meters of the straight line from the middle position,Earth Resistance Tester and the measurement error can be ignored. When the distance between the ground electrode and the current probe is less than 40m, Earth Resistance Tester the potential probe should be inserted in the middle of the straight line. When measuring with a grounding resistance test meter,Earth Resistance Tester the grounding body must be disconnected from the equipment being maintained.

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