Scientific Apparatus Manufacturers Association SAMA

Scientific Apparatus Manufacturers Association (SAMA). The fossil-fuel electric utility industiy generally follows this standard. 

Accuracy and Repeatability Definitions of terminology pertaining to process measurements can be obtained from standard S5I.I from the International Society of Measurment and Control (ISA) and standard RC20-II from the Scientific Apparatus Manufacturers Association (SAMA), both of which are updated periodically. An appreciation of accuracy and repeatability is especially important. Some applications depend on the accuracy of the instrument, but other applications depend on repeatability. Excellent accuracy implies excellent repeatability however, an instrument can have poor accuracy but excellent repeatability. In some applications, this is acceptable, as discussed below. 

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