Journal of Chemical and Pharmaceutical Research (ISSN : 0975-7384)

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Original Articles: 2014 Vol: 6 Issue: 6

50 kg high capacity mass comparator and its performance test

Abstract

The calibration of heavy mass standards is a difficult, demanding, and time consuming process. Loading and unloading of heavy mass standards is strenuous work as well as placing of the weights in the center of the weighing position by human. With the improvement of the technique and customer’s requirements, it is necessary to establish the mass standard of 50 kg weight. A high capacity automatic comparator with readability of 0.1 mg has become available in National Institute of Metrology (NIM). Performance analysis of this mass comparator is shown in the paper. Then three class E1 50 kg weights are measured on this new equipment, the measurement result and uncertainty are given out as well as experience in use.