Resistance tester is an indispensable tool for electrical safety inspection and completion acceptance of grounding projects. The resistance tester is suitable for testing the contact resistance value of the main contact of the high and low voltage switch and the DC resistance value of the high and low voltage cable circuit. The resistance tester adopts 100A constant current output. The output voltage is as high as 10V, and a thin-loaded test line can be used, which greatly reduces the labor intensity of the field tester. The test process is automatically controlled by a single-chip microcomputer, with high accuracy, good repeatability, single-key operation, simple and easy, and the test data is displayed on the LCD.

The resistance tester is suitable for different working environments. It is a commonly used instrument for testing and measuring grounding resistance. Due to the rapid development of computer technology in recent years, resistance testers have also penetrated into a large number of microprocessor technologies. The resistance tester is a new generation of transformer DC resistance tester. It can automatically select the test current according to different types of power transformers, and display the test results at a faster speed. The DC resistance tester also has functions such as storage, printing and discharge indication. It has a built-in non-shutdown memory that can store measurement data for a long time. The use of liquid crystal display makes this instrument a good man-machine interface and a suitable choice for DC resistance testing.

Precautions for the use of resistance tester:

1. The working environment of the instrument: relative humidity≤75%RH, temperature 0~40℃.

2. The resistance tester needs to be operated by full-time personnel (trained and qualified). If the instrument will not be used for a long time, turn off the power.

3. When connecting or disassembling the tested product, it needs to be carried out in the "reset" state.

4. The connection between the resistance tester and the instrument is good, the two ends of the measured resistance must be clamped, and the digital change of the ammeter must be paid attention to when adjusting the loop current, and slowly adjusted to the required current value.

5. After the test is over, please press the reset button first, and then restore the current to zero. If an abnormal situation occurs during the test, please press the reset button first, and then quickly restore the current to zero.

6. If the resistance tester fails, the inspection should be stopped and returned to the laboratory to send it to the relevant unit for measurement. Products or components tested within 2 hours should be retested with qualified equipment.