Wiring method of loop resistance tester:

1. The loop resistance tester is wired according to the four-terminal connection shown in Figure 2.

2. After confirming that it is correct, turn on the power switch, the ammeter and voltmeter display as 000, and one digit jumping is allowed in the last digit.

3. After pressing the measurement switch, whether the ammeter is at 100A. If it is not at 100A, adjust the fine-tuning knob to make the current 100A and keep it stable. At this time, the displayed value of the resistance meter is the measured resistance value. (If it displays 1, it means the measured resistance The loop resistance value exceeds the range). After the value stabilizes, usually 5-10 seconds, please record it immediately and press the measurement key to stop the measurement.

4. If you use the correct wiring method, and the measured current is less than 100A, or zero, you should check whether the high-current wire used is too small in section, or whether the connected circuit is connected.

5. After the measurement, turn off the power switch. Loop resistance tester

The loop tester is made with digital circuit technology and switch circuit technology. It is a device used to measure the contact resistance and loop resistance of switch control equipment. It can directly measure the loop resistance or contact resistance under the condition of 100A current and display it digitally. , The instrument is accurate in measurement and stable in performance. It is suitable for on-site high-voltage switch maintenance and high-voltage switch factory loop resistance testing requirements of electric power and power supply departments.