ASTM E617 FREE DOWNLOAD

Weights made of wire or too small to be marked shall not be marked but should be identifiable by their shape or number of bends. We need your help to maintenance this website. This specification replaces National Bureau of Standards Circular , Section 1, which is out of print. All weights shall be free of ragged or sharp edges or ends. If it can be assumed that the type B uncertainty estimates are conservative with infinite degrees of freedom, the formula has the form: This uncertainty contribution is applicable, if it is known from previous interchanging measurements with weights of the same nominal value.

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Weight Class Weight Class 6. Periods shall not be used with abbreviations in marking weights. The standard deviation can also be calculated as described in 9.

Standard Specification for Laboratory Weights and Precision Mass Standards

The surface of the weights may be treated with a suitable coating in order to improve their corrosion resistance. Markings shall not perforate or crack sheet metal weights. Both sheet asrm and wire weights shall be free of cracks such as may be formed from bending. For Classes 5, 6 and 7 the total surface areas should be minimized to the extent possible. The outer diameter, top axtm bottom surface roughness must meet Table 6. These maximum permissible errors apply to conventional mass values.

Other cylindrical class 6 and 7 weights of 5 kg or greater shall be made of grey cast iron or of another e67 whose brittleness and resistance to corrosion is asgm or better than that of grey cast 5. We are a non-profit group that run this website to share documents.

Abbreviations are shown in Appendix X2. We need your help to maintenance this website. If ast can be assumed that the type B uncertainty estimates are conservative with infinite degrees of freedom, the formula has the form: This specification replaces National Bureau of Standards CircularSection 1, which is out of print.

Size px x x x x Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.

ASTM E - 13 Standard Specification for Laboratory Weights and Precision Mass Standards

Ordering Information 4 and 5 6 and 7 80 Not applicable 6. Maximum Permissible Errors 4. S617 prototype standard—platinum-iridium kilogram identified as K20, maintained at the National Institute of Standards and Technology, with value assigned relative to the International Prototype Kilogram provides the United States access to the mass unit. In the case of sets of non-metric weights, at least the largest weight of a particular set should be marked with the unit name or abbreviation.

This specification covers laboratory weights and precision mass standards including their principal physical characteristics and metrological requirements. Cast iron cannot have a susceptibility specification of any real value. Only the numerical portion of the weight value needs to be on the surface of weights.

This may be interpreted as an eccentric loading error and the w617 uncertainty should be estimated using Eq For Class and 00 the manufacturer shall provide a measured value for the density of the weights. Sheet metal weights or wire weights may be used below 1 g.

Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. Permission rights to photocopy the standard may also be secured from the ASTM website www.

Physical characteristics shall be based on construction, design, surface area, materials, magnetism, density, surface aztm, weight adjustment, and marking. D617 assessed profile of a sample can be in terms of different profile types: The letter R is indicative of the type of assessed profile, in this case R for roughness profile. Maximum permissible error, magnetic property, density, and surface roughness for each weight shall be within the limits indicated in this specification.

If previous calibration values are not available, the estimation of uncertainty has to be based on experience.

This coating shall withstand shocks and outdoor weather conditions.