Balances and Weighing results

There are numerous standards requiring the monitoring of measuring instruments, for example NF EN ISO 9001 , NF EN ISO/IEC 17025 These include the European Pharmacopoeia, the North American Pharmacopoeia USP, Good Manufacturing and Laboratory Practice (GMP, GLP) regulations and food safety standards.

Almost everyone working in quality control and quality assurance, whether in the laboratory or in production, is familiar with the applicable requirements stipulated in these documents.

The monitoring required involves setting up operating procedures for qualification, validation, calibration, verification and uncertainty determination.

This article is an introduction to :

• gain a better understanding of scale operation, installation and operating conditions, and the technical and metrological terms used in weighing;

• set up corresponding operating procedures;

• demonstrate traceability to national standards at all times;

• to publicize the operating criteria adopted;

• manage the risk of scale drift.

By applying the supplementary articles [P 1 382][R 1 732][R 1 734] and [R 1 735] , the reader can also control the risks of noncompliance, limit the impact of weighing uncertainty on the quality of his analyses or products, and determine the minimum applicable weight in order to deal with the classic questions related to the balances involved in his analytical and manufacturing processes:

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