相对测量一般只读出实际偏差而不测尺寸的实际值,这就要使用调整标准件(简称标准件)。标准件有两个作用;一仪器调零;二检验整个测量系统工作是否稳定。用标准件对仪器的调零是按计量好,并标刻在标准件上实际值将量仪准确对度后即认作量仪的数值调零了。从调整的角度讲,标准件只需计量得准,没有必要制造得准。有时对表的表面积较大和平行度、不圆度等形状误差因素的影响,国外习惯是在对表面上标出对表区域,标刻实际值系指区域内的尺寸。可 Relative measurement generally read only the actual deviation of the actual value of the measured size, which requires the use of adjustment standards (referred to as the standard parts). Standard parts have two functions; an instrument zero; two test the entire measurement system is stable. The use of standard parts of the instrument is zero according to the measurement is good, and marked on the actual value of the standard parts of the meter after the accuracy of the instrument that is recognized as the meter value zero. From the adjustment point of view, the standard parts only need to be measured accurately, there is no need to create a standard. Sometimes on the surface of the table larger and parallelism, non-circularity and other shape error factors, the foreign custom is to mark the surface area on the surface, marking the actual value refers to the size of the region. can