Intelligent grounding resistance online monitoring terminal device (with screen display of resistance value)

The intelligent grounding resistance online monitoring terminal device (with screen display of resistance value) is a specialized instrument used for measuring grounding resistance. It is based on Ohm's law and uses the four wire testing principle to accurately measure parameters such as grounding impedance, grounding resistance, field surface potential gradient, contact potential difference, step voltage, and soil resistivity of the grounding grid.

Grounding resistance testerThere are various types, which can be divided into traditional hand cranked and battery driven according to the power supply method; According to the display mode, it can be divided into pointer type and digital type; According to the measurement method, it can be divided into pile type and clamp type. Among them, digital grounding resistance testers have been widely used in power, postal, railway, communication, mining and other departments, while clamp type grounding resistance testers are particularly suitable for measuring grounding resistance of power, telecommunications, meteorology, oil fields, buildings and industrial electrical equipment.

The working principle of the grounding resistance tester is mainly to convert DC into AC low-frequency constant current through the DC/AC converter inside the machine, then form a circuit through the auxiliary grounding electrode and the measured object, generate AC voltage drop on the measured object, send it to the AC amplifier for amplification through the auxiliary grounding electrode, and then send it to the meter head for display after detection. By using a magnification switch, different measurement limits can be obtained to meet different measurement needs.

The grounding resistance tester plays an indispensable role in electrical safety inspection and completion acceptance of grounding engineering. It can help engineers and technicians accurately assess the performance of grounding systems, ensuring electrical equipment and personal safety. Meanwhile, with the continuous development of computer technology, modern grounding resistance testers also have microprocessor technology, which significantly improves their measurement functions, content, and accuracy.

When using a grounding resistance tester, it is necessary to pay attention to the correct operation method and precautions to ensure the accuracy and reliability of the measurement results. In addition, it is necessary to regularly maintain and calibrate the instrument to ensure its long-term stable operation.

In short, the grounding resistance tester is an important electrical measuring device that is of great significance for ensuring the safety of electrical equipment and personnel.