What to do if the DC resistance tester has a flickering condition:

1. Poor internal cable contact: turn off the cable and check if the cable is loose, just reinforce the cable.

2. Electromagnetic interference causes abnormal screen display: just contact the manufacturer and add a filter capacitor.

In addition, the daily operation of the operator will also affect the service life of the instrument. Therefore, we should not touch the LED screen with high temperature objects when using the DC resistance tester, and check whether the input interface fixture is normal before the test. In addition, keeping the equipment dry and clean is also an effective way to extend the service life.

In order to effectively reduce the failure rate of the DC resistance tester, it is recommended that users regularly maintain and maintain the equipment during use.

1. Observe the appearance: check whether there is oil leakage, smoke or emissions from the parts; the transformer shell is not tightly welded or the rubber pad is not firm, which may cause the transformer to leak. If the oil level is too low, the insulation protection will be lost and the conductive parts will be lost. Discharge between the conductive part and the shell occasionally will burn the transformer in severe cases. Therefore, the fault should be eliminated and the oil should be added in time to ensure that the oil level is maintained at 1/4 to 3/4 of the oil standard. For loose parts, poor contact or even discharge, the transformer's fall insurance should be cut off in time to eliminate hidden dangers.

2. Regularly check the casing: the casing is a kind of component insulation, which is composed of a conductive tube and a casing-type insulation. In the case of a transformer, it is used to lead its internal windings to the electrical connection with the power system or electrical equipment.

3. Check the moisture absorption device: When the volume of the transformer oil expands and contracts due to changes in load or ambient temperature, the gas in the oil storage tank is forced to breathe through the moisture absorption device to remove debris and moisture in the air, thereby Maintain the dielectric strength of the transformer oil in the transformer.

4. Regularly check and replace one or two fuses: it is strictly forbidden to use aluminum wires to replace the fuses. The primary fuse protects the system, and the secondary fuse protects the transformer.