ASTM实验室砝码标准规范 是非制性家标准

适用范围

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.

中文解释：

适用范围

1.1本规范涵盖了实验室使用的重量和质量标准，特别是0、1、2、3、4、5、6和7级。本规范取代了家标准局547号通知节，该部分已售完。

1.2本规范步认识到存在建议R111，该建议描述了E1、E2、F1、F2、M1、M2和M3类。用户可根据需要选择引用R111或本规范。

1.3本规范含所用砝码的主要物理特性和计量要求。

1.3.1用于称重仪表的检定；

1.3.2用于验证较低精度等级的重量；以及

1.3.3带称重仪表。

1.4描述了每类的公差和设计限制，以便为适当的应用选择单独的重量或重量组。

1.5以单位制表示的数值应视为标准值。