千分尺是工厂生产中使用最普遍的万能量具之一,其精度级别是以示值误差的大小划分的。千分尺经使用一段时间之后因示值误差增大而降级,这时如果采用零位补偿的方法可以保持原有精度级别。零位补偿的原理如下所述。千分尺示值误差分布的类型主要有三种: 1.在整个测量范围内示值误差均为正偏差 Micrometers are one of the most versatile gauges used in the factory and their accuracy levels are divided by the magnitude of the indication error. Micrometer by the use of a period of time due to the error increases the value of downgrade, then use the method of zero compensation can maintain the original level of accuracy. The principle of zero compensation is as follows. There are three main types of error indication for micrometer indication: 1. The indication error in the whole measurement range is positive deviation