This specification covers laboratory weights and precision mass standards including their principal physical characteristics and metrological requirements. Maximum permissible error, magnetic property, density, and surface roughness for each weight shall be within the limits indicated in this specification. Physical characteristics shall be based on construction, design, surface area, materials, magnetism, density, surface finish, weight adjustment, and marking.

This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

1. Scope

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 1, 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.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ANSI Standard

Keywords

Adjustment tolerance; Buoyancy corrections; Laboratory--clinical; Laboratory apparatus--specifications; Mass; Reference weight/mass standards; Scales--specifications; Terminology--laboratory applications; Tolerances--medical/laboratory equipment applications; Weight; Adjustment tolerance; Buoyancy corrections; Laboratory--clinical; Laboratory apparatus--specifications; Mass; Reference weight/mass standards; Scales--specifications; Terminology--laboratory applications; Tolerances--medical/laboratory equipment applications; Weight;

ICS Code

ICS Number Code 71.040.20 (Laboratory ware and related apparatus)

Citing ASTM Standards

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