< back to main site

Publications

An assessment of commercial mass comparators for the effects of magnetic and magnetically susceptible weights.

Davidson, S (1999) An assessment of commercial mass comparators for the effects of magnetic and magnetically susceptible weights. NPL Report. CMAM 32

[img] Text
CMAM32.pdf

Download (132kB)

Abstract

An investigation into the effect of magnetic weights on the performance of commercial mass comparators has been undertaken. The sensitivity of six comparators has been assessed using both magnetic and magnetically susceptible weights. Using a calibrated gaussmeter the balances were initially assessed for magnetic field strength, both in the weighing chamber and around the balance case, and checked for magnetic components. Further tests were performed using magnetised weights placed both directly on the weighing pan and spaced 117 mm above it. The results of these tests were used to assess the potential errors involved in the calibration of weakly and strongly magnetic weights. Finally magnets of various strengths were introduced into the proximity of the balance to assess the effect of stray magnetic fields on the balance readings. The results for the calibration of a magnetically susceptible kilogram weight on NPL’s kilogram mass comparators are also summarised.

Item Type: Report/Guide (NPL Report)
NPL Report No.: CMAM 32
Subjects: Engineering Measurements
Engineering Measurements > Mass, Force, Pressure
Last Modified: 02 Feb 2018 13:18
URI: http://eprintspublications.npl.co.uk/id/eprint/1096

Actions (login required)

View Item View Item