If the loop resistance tester has the following failure phenomena, the troubleshooting methods are as follows:

Trouble phenomenon:

1. There is no response after booting, and the LCD screen has no display

  Troubleshooting: 1) Check whether there is AC power supply;

2) Check the power cable;

3) Check whether the fuse in the fuse base is blown.

2. During the test, the resistance value is obviously too large or displayed as over-range

  Troubleshooting: 1) Check whether the measured resistance value is too large;

2) Check whether the voltage input line is connected to the inner side of the current output line;

3) Check whether the polarity of the test line is reversed;

4) Check whether the voltage output line is connected well, and whether the joint of the test piece is oxidized.

3. No response when rotating the mouse

  Troubleshooting:

1) Turn off the power and restart;

2) Press the reset button to reset the instrument.

4. Communication is unsuccessful

Troubleshooting:

1) Check whether the data cable is connected properly;

2) Check whether the instrument is online;

3) Reinstall after uninstalling the driver;

4) Press the reset button to reset the instrument.