Abstract
The need to develop a new state verification scheme (SVS) is caused by the emergence of high-precision bridges, resistance measures and boxes with a low temperature coefficient (0,02–0,5) ppm/К, highly stable transient measures, electronic resistance calibrators, and high frequency resistance measures. Recommendations how to assign the status of a working standard to measures, R-meters and measuring shunts with accuracy from 0,005 % to 0,500 %, sufficient for verification of measuring instruments, are given. SVS consists of two parts: part 1 covers electrical resistance measures, boxes and R-meters, part 2 – to measuring shunts and shunt resistance meters. Part 2 was introduced to the SVS for the first time. The revised indicators of accuracy for working standards of all levels are considered, conditions for the investigation of measuring instruments for assigning the status of a working standard, criteria for assessing metrological characteristics are given.
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