Precision measuring tools is to ensure that one of the important conditions for the quality of the product. To keep the measuring accuracy and reliabi.

Should the gauge measuring surface and parts of the surface is measured to clean 1 before measuring, so as to avoid dirt exists affect measurement acc.

If the above three steps are not found any problems, then check all circuits. Whether the wire circuit breaker view appears, especially the wire groov.

As the maintenance staff negligence, it may be that some sensor position errors, such as not in place, the sensitivity of sensor fault, fault etc.. Sh.