千分表的检定方法很多,例如采用阿贝比长仪、卧式万能测长仪、万能工具显微镜,以及使用四等二级量块与千分尺组合进行比较检定等。这些方法使用的仪器或量块价格昂贵,一般都固定在计量室,量具站不能就地检定, Dial gauge verification methods, such as the use of Abbey long instrument, horizontal universal length measuring instrument, universal tool microscope, and the use of four two-level block and micrometer combination of comparison test. The instruments or measuring blocks used by these methods are expensive and are generally fixed in the metering chamber. The measuring station can not be calibrated on site,