The earth resistance tester is a common instrument for testing and measuring grounding resistance, and it is also an indispensable tool for an electrical safety inspection and complete acceptance of grounding projects. Due to the rapid development of computer technology, digital ground resistance testers have also penetrated a large number of ground resistance tester microprocessor technology, and their measurement functions, content and accuracy are unmatched by general instruments.
What is an earth resistance tester used for?
- The earth resistance tester can accurately measure the grounding impedance, grounding resistance and grounding reactance of large grounding grids.
- Measure the surface potential gradient in the large grounding grid area.
- Accurately measure the contact potential difference, contact voltage, step potential difference and step voltage of large grounding grids.
- It is used to accurately measure the transfer potential of large grounding grids.
- Measure the conduction resistance of the grounding down conductor.
- Some models can also measure soil resistivity.
The most important thing is that the ground resistance tester can measure the resistance of the ground electrode to the ground, and then judge whether it meets the system requirements. The ground resistance state is very important for lightning protection, electrical safety, and ground voltage impedance (such as the DC state of the post and telecommunications, the directionality and efficiency of the radio station).
At present, the ground resistance tester can meet all ground measurement requirements. Clamp ground resistance testers and digital ground resistance testers are available at SISCO.com. The clamp ground resistance tester uses the jaw method and does not need to install piles and wires for online direct measurement. A powerful grounding resistance tester is controlled by a microprocessor, which can automatically detect the connection status of each interface and the interference voltage and frequency of the ground network, and has unique functions such as value holding and intelligent prompting.
When measuring the grounding system with a loop, the clamp on ground resistance tester does not need to disconnect the grounding down conductor, does not need auxiliary electrodes, and is safe, fast, and easy to use. It is widely used in electric power, telecommunications, meteorology, oil fields, construction and industrial electrical earth resistance measurement of equipment. The long jaw is especially suitable for the grounding of flat steel.
Digital earth resistance tester consists of a host, monitoring software, test lines, communication lines, etc. It can be used as a soil resistivity tester with a unique line resistance calibration function, which is more accurate in measuring low-value grounding resistance on site.
SISCO provides digital earth testers with a 0.00 to 300k ohm range, which can measure ground faults that cannot be measured by traditional methods and can be applied to occasions that cannot be measured by traditional methods.