By hvhipot 
The loop resistance tester performs a series of characteristic tests on power operating equipment in accordance with the relevant power industry and related technical standards.
Basic operation steps of loop resistance tester:
1. Connect the ground wire.
2. Using the fHV Hipot Electric Co., Ltd.-terminal measurement method, connect the voltage measurement line to the inner side of the current output line (connect the thicker current output line to the binding posts at both ends of the instrument panel panel, and connect the thinner voltage measurement line to the two middle of the instrument panel. On each terminal, the color of the wire corresponds to the color of the terminal)
3. Connect the power supply, adjust the current knob to “zero”, close the power switch, the resistance meter and the ammeter display “000”, at this time the single digit on the meter beating is normal.
4. Clamp the two test clamps at both ends of the test product, turn on the test switch, and adjust the current output to “100.0”. At this time, the number on the resistance meter is the resistance value of the test product.
5. Adjust the current output to the minimum, turn off the measurement switch, and cut off the power supply.
Note: Before removing the measuring clamp, make sure that the measuring switch is in the off state to avoid danger!
The application scenarios of the loop resistance tester are complex and need to be combined with the actual environmental scientific application. If the influence of external environmental factors cannot be avoided, its use effect will inevitably be affected. For example, in a strong electromagnetic interference environment, the loop resistance tester may cause command miscommunication or protection malfunction. So pay special attention to the environmental requirements of the loop resistance tester.
All in all, with the increase in the scale of the power system, the application range of the loop resistance tester is also increasing. In order to ensure the safety of the power system operation, we should pay more attention to the loop resistance tester, effectively eliminate common faults, and take corresponding measures. Preventive measures to reduce the cost of inspection and maintenance, truly ensure the continuous supply of electric energy, and ensure the smooth development of social activities and generation activities.