The function of ground resistance tester

The ground resistance tester is a special instrument developed based on Ohm's law and the four-wire method for the power industry. It is a new type of ground resistance measuring instrument, which is commonly used in power experiments. So what are the main functions of the ground resistance tester? The editor of Wuhan Longdian Electric will give you a detailed answer today.

Compared with the traditional hand-cranked ground resistance tester, the ground resistance tester has the following characteristics:

1. It applies DC/AC conversion technology, integrates three-terminal and four-terminal measurement methods, and can use both AC and DC power supply;

2. High-strength aluminum alloy is used as the mobile phone shell. In order to prevent power frequency and radio frequency interference, the circuit adopts a phase-locked loop synchronous tracking detection method and is equipped with a switched capacitor filter to make the instrument have better anti-interference ability;

3. Abandon the traditional manual hand-cranked power generation method, no human effort is required;

4. No need to adjust the balance manually, the panel touch key operation is clear at a glance, and the LCD digital display makes the measurement very convenient and fast, eliminating the visual error of the pointer instrument;

5. The allowable auxiliary grounding resistance is very large, which better ensures the measurement accuracy and high resolution;

6. The auxiliary grounding resistance is allowed to vary between 0~2KΩ (RC) and 0~40KΩ (RP) without affecting the measurement results;

7. In addition to testing the grounding resistance, it can also test the low voltage resistance value, soil resistivity and AC ground voltage;

Ground resistance testers are mainly divided into the following types: digital ground resistance testers, clamp-type ground resistance testers, multi-function clamp-type ground resistance testers, and ground resistance measuring instruments of the same model with different parameters; digital ground resistance testers are suitable for measuring the ground resistance of various devices in the power, post and telecommunications, railways, communications, mining and other departments, as well as measuring the resistance value of low-resistance conductors; clamp-type ground resistance testers are widely used in ground resistance measurement of power, telecommunications, meteorology, oil fields, construction and industrial electrical equipment; double-clamp multi-function ground resistance testers are suitable for telecommunications, power, meteorology, computer rooms, power distribution lines, tower transmission lines, gas stations, factory grounding grids, lightning rods, etc.