Standards Index · NIST
NIST IR 6969:2019
Selected Laboratory and Measurement Practices and Procedures to Support Basic Mass Calibrations (SOP series)
What it covers
The NIST OWM compendium containing the SOP series — including SOP 1 (certificate preparation) and SOP 29 (uncertainty assignment) held in this library. Freely available.
Summary written for this index — consult the official text for normative requirements.