Fri 31.07.2026
NBS Technical Note 430 addresses methods for monitoring and controlling the stability of voltage standards and measurement processes. The authors describe procedures for verifying the long-term consistency of groups of reference standards, efficiently transferring values to test items, and continuously assessing measurement performance. The report emphasizes statistical process control and the collection of information required for estimating and managing measurement uncertainty within and between laboratories.
Authors: W. G. Eicke and J. M. Cameron
Abstract: When a local standard such as that for electromotive force is maintained by a group of standards, procedures must be established to provide evidence that the group has maintained its original value. One also needs methods for the transfer of the value to test items that provide efficient use of measurement effort while monitoring the measurement process and providing information for updating the values of process parameters. Solutions to the more general problem of transferring the value from laboratory to laboratory and of maintaining agreement among laboratories depend on the existence of control within the laboratories.
This note is one of a number of contemplated reports having the general aim of providing methods for the surveillance of measurement processes with emphasis on the amount and kind of information needed for the estimation and control of the uncertainty in measurement.
Link for download: NBS Technical Note 430: Designs for Surveillance of the Volt
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