What is the principle of ground resistance meter and its measuring method?
The manual earth stop meter is a kind of traditional measuring instrument. Its basic principle is to adopt the three point voltage drop method. The measuring method is in the measured ground ground pile (called X) on one side into two auxiliary test piles, the two test piles in requirements of pile on the same side, three are basically in a straight line, from the measured pile near a pile (called the auxiliary test Y) distance of about 20 meters away from the pile, the pile is measured from a root aided test pile (called Z) from the measured pile 40 meters.
During the test, turning the handle according to the requirements of the speed tester through internal magnetic motor to generate electricity, the measured pile X and farther aided test pile (called Z) between "into" the current time in between the measured pile and X pile can obtain a Y auxiliary voltage meter by measuring the current and voltage values can be calculated by measuring the grounding resistance of the pile. The biggest difference between the ground resistance meter and the electrician's shake table is that the use is not the same. The two can not replace each other. There is no device that can always measure and display the size of the lightning protection, only by regularly testing your ground resistance.
The main use of the earth meter is to measure the grounding resistance and ground voltage of various grounding devices, and also to measure the soil resistivity and the resistance of the low resistance conductor.The main features of ground resistance meter are: synchronous detection and other advanced technology, strong anti-interference ability; 31/2LCD digital display, high resolution, showing the value of accurate; the battery power supply, with undervoltage indicator "instructions; grounding measured open circuit or current auxiliary grounding resistance is greater than the range limit, the lower left corner of the" OPEN display"CIRCUIT" indication, with convenient operation, convenient carrying, low power consumption, shockproof, dustproof, moisture-proof structure, adapting to bad working environment.
