The failure rate of digital calipers is very low. Most of the problems encountered by users are caused by battery consumption or poor contact. Occasionally, the following 

failures may occur:

1. "Freeze": Due to occasional interference from external electromagnetic fields, the display value is locked and sometimes accompanied by other symbols.

Treatment method: The battery should be removed, stopped for more than 30 seconds, and then reinstalled. It can be restored to normal after one or several times.

2. Flashing: The battery voltage is low and the battery should be replaced as soon as possible.

3. Digital confusion: The display is unstable. Due to moisture on the surface of the protective film, the treatment method is shown in the aforementioned "Precautions for 

Use".

4. Mechanical wear: The repair method is basically the same as that of ordinary vernier calipers, but forceful knocking should be avoided. The electronic components should 

be removed and knocked. Since it can be reset at any point and is not limited by the zero error requirements of the vernier caliper, the number of repairs can also be increased

.It is worth noting that the inner jaws are repaired. Since the left end of the ordinary four-purpose caliper is used as a step measuring surface, the root of the inner jaws is 

hard and brittle, making it difficult to repair.