4. Physical influences on weighing results
Physical influences are often to blame when the weight display is not stable, when results increase or decrease slowly, or when values are incorrect.
The most common causes are :
improper handling of the products to be weighed;
incorrect location of the scale;
evaporation or absorption of moisture by the products to be weighed;
products to be weighed or containers charged with static electricity;
products to be weighed or magnetic containers.
This section describes these influences and their causes, and suggests a number of measures to be taken.
4.1 Temperature
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Physical influences on weighing results
Checking a scale
Bibliography
Standards
- Quality management systems – Basic principles and vocabulary - NF EN ISO 9000 - 2015
- Quality management systems – Requirements - NF EN ISO 9001 - 2015
- Aspects métrologiques des instruments de pesage à fonctionnement non automatique - NF EN 45501 - 2015
- Vocabulaire international des termes fondamentaux et généraux de métrologie (VIM) - NF X07-001 (annulée) - 1994
- International Vocabulary of Metrology...
Regulations
International Recommendation OIML R76-1, "Non-automatic weighing instruments – Part 1: Metrological and technical requirements – Tests" available from the Bureau International de Métrologie Légale (Paris).
OIML International Recommendation R33, "Conventional value of air weighing results", available from the Bureau International de Métrologie Légale (Paris).
International recommendations...
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