A resistance tester is an electronic testing device that measures the resistance of circuit components or devices. Its basic principle is to use a pure resistance circuit to measure resistance value. Through the unique circuit built into the instrument and the correction method of contact resistance, high-precision and high-stability resistance measurement is achieved. The main functions of the resistance tester are as follows:
1. Measure the resistance value of electronic components
2. Test resistance in the power industry
3. Resistance testing in the communications industry
4.Applications in instrument manufacturing and aerospace fields
Resistance tester can measure the parameters of resistors, inductors, capacitors and other components, as well as detect wiring, switches, leads and other problems in the circuit, helping engineers judge the reliability of the circuit and ensure product quality.
There are many types of resistance testers, including earth ground resistance tester, insulation resistance testers, DC resistance testers, surface resistance testers and loop resistance testers.
Today Push from China would like to give a grief speech of resistance testers.
Resistance tester of high-speed measurements
In order to meet the requirements of rapid measurement of transformer DC resistance, our company has developed PS-ZD20T three-phase winding resistance tester for YN coupling winding. The tester can achieve three-phase power supply on at the same time, independent current sampling, voltage sampling, simultaneous measurement and display of three-phase resistance value and three-phase unbalance rate and other functions. It can greatly shorten the DC resistance testing time. It solves the problem of long DC resistance testing time for each tap winding of power transformer. The time required is only 1/3 of the traditional earth resistance tester method.
High-precision resistance tester
The Transformer DC Winding Resistance Tester adopts advanced switching power supply technology, and its measurement speed is more than a hundred times faster than that of a bridge. The display part consists of a four-and-a-half-digit LCD to display the measurement results, and a three-and-a-half-digit LCD to display the ambient temperature or test current value. It overcomes the disadvantage of other similar products that the LED display value is inconvenient to read in sunlight, and also has an automatic arc extinguishing function. This Transformer DC Winding Resistance Tester has the advantages of fast measurement speed, high accuracy, intuitive display, strong anti-interference ability, small size, low power consumption, stable and reliable test data, and is not affected by human factors.
Earth ground resistance tester
A Grounding resistance tester is a device that measures ground resistance. Ground resistance tester, also called ground resistance meter, is an instrument specially used to directly measure the ground resistance value of various grounding devices. The working principle of the ground resistance measuring instrument: The instrument generates a constant current source of alternating current. When measuring the ground resistance value, the constant current source sends an alternating constant current from the E terminal and the C terminal to the ground body and the current auxiliary pole. This current generates a corresponding alternating voltage value on the measured object. The instrument connects the E terminal and the The voltage auxiliary pole P terminal detects the alternating voltage value. After the data is processed, the resistance value of the measured grounding body under the applied alternating current is directly displayed digitally.