ASTM實驗室砝碼標準規(guī)范 是非制性家標準 適用范圍 1.1 This specification covers weights and mass standards used in laboratories, specifically classes 0, 1, 2, 3, 4, 5, 6 and 7. This specification replaces National Bureau of Standards Circular 547, Section , which is out of print. 1.2 This specification further recognizes that International Recommendation R111 exists, that describes classes E1, E2, F1, F2, M1, M2 and M3. Users may choose to reference either R111 or this specification, depending on requirements. 1.3 This specification contains the principal physical characteristics and metrological requirements for weights that are used. 1.3.1 For the verification of weighing instruments; 1.3.2 For the verification of weights of a lower class of accuracy; and 1.3.3 With weighing instruments. 1.4 Tolerances and design restrictions for each class are described in order that both individual weights or sets of weights can be chosen for appropriate applications. 1.5 The values stated in SI units are to be regarded as the standard. 中文解釋： 適用范圍 1.1本規(guī)范涵蓋了實驗室使用的重量和質(zhì)量標準，特別是0、1、2、3、4、5、6和7級。本規(guī)范取代了家標準局547號通知節(jié)，該部分已售完。 1.2本規(guī)范步認識到存在建議R111，該建議描述了E1、E2、F1、F2、M1、M2和M3類。用戶可根據(jù)需要選擇引用R111或本規(guī)范。 1.3本規(guī)范含所用砝碼的主要物理特性和計量要求。 1.3.1用于稱重儀表的檢定； 1.3.2用于驗證較低精度等級的重量；以及 1.3.3帶稱重儀表。 1.4描述了每類的公差和設(shè)計限制，以便為適當?shù)膽?yīng)用選擇單獨的重量或重量組。 1.5以單位制表示的數(shù)值應(yīng)視為標準值。 
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