Troubleshooting methods are as follows:

Failure phenomena:

1, after the boot without reaction, LCD screen without display

Troubleshooting: 1) to check whether the AC power supply;

2) check the power cable;

3) check whether the safety tube in the base of the insurance tube is burnt off.

2, the value of the test is obviously larger than the value of the test range

Troubleshooting: 1) to check whether the value of the measured resistance is too large;

2) check whether the voltage input line is connected to the inside of the current output line;

3) check whether the polarity of the test line is connected to the reverse;

4) check the voltage output line is not connected, the test piece is oxidized.

3, the rotation of the mouse without reaction

Troubleshooting: 1) off the power to restart;

2) press the reset button to reset the instrument.

4, communication is not successful

Troubleshooting: 1) check whether the data line is connected;

2) check whether the instrument is in line;

3) after unloading the driver to install;

4) press the reset button to reset the instrument.

Loop resistance testing instrument developed in the West Huadian when using the notes as follows:

1. Please read the instructions carefully before using the instrument.

2, please follow the instructions on the correct wiring method.

3, the instrument shall not test the loop resistance in the charged loop.

4, the instrument must be reliable grounding in the use of.

5, the current line users shall not be free to replace.

6, the instrument does not use should be placed in ventilation, dry, cool, clean place to save, pay attention to moisture, corrosion of the gas.