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An investigation into the effect of marking mass standards of OIML class E1.

Berry, J; Downes, S P (2006) An investigation into the effect of marking mass standards of OIML class E1. NPL Report. DEPC-EM 002

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Abstract

The marking of weights in mass laboratories is widely used as a means of identifying a particular weight and hence differentiating between similar weights. This report assesses the effect of a variety of weight marking processes on the mass of a weight and sample materials against the tolerance limits set by the OIML recommendation No 111 for class E1 weights. In addition, the mass stabilities of weights marked with a laser technique were assessed over an eight-month period following their marking. The results obtained demonstrate that die stamping, laser marking and acid etching can be used on E1 class weights. Unacceptably large mass losses occurred from spark erosion and as such this process is not recommended for weight marking.

Item Type: Report/Guide (NPL Report)
NPL Report No.: DEPC-EM 002
Keywords: etching, weights
Subjects: Engineering Measurements
Engineering Measurements > Mass, Force, Pressure
Last Modified: 02 Feb 2018 13:15
URI: http://eprintspublications.npl.co.uk/id/eprint/3452

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