Knowledge
Metrology Dictionary
The complete VIM vocabulary — all numbered concepts of JCGM 200:2012 as faithful paraphrases with clause citations — plus clearly labeled practice terms from the GUM, ILAC, ISO and NIST guidance.
Calibration and measurement capability (CMC)
The smallest uncertainty of measurement a laboratory can achieve within its accredited scope when performing more or less routine calibrations of nearly ideal devices — the uncertainty published in its scope of accreditation.
ILAC-P14:09/2020 · Quality & Accreditation
Calibration interval
The period between successive calibrations of an instrument, set and adjusted from stability history, usage, environment, and risk — commonly managed with interval-analysis methods such as those in NCSLI RP-1 and ILAC-G24.
ILAC-G24:2022 · Calibration
Check standard
A stable artifact or instrument measured regularly within a measurement assurance program; its control chart reveals drift, shifts, or loss of statistical control of the process.
NIST SOP 30 / GLP 1 · Quality & Accreditation
Conventional mass
The conventional value of the result of weighing in air, based on a reference density of 8000 kg/m³ for the weight and 1.2 kg/m³ for air at 20 °C — the basis on which standard weights are specified per OIML R 111.
OIML R 111-1:2004 · Mass
Coordinate measuring machine (CMM)
A measuring system with the means to move a probing system and determine spatial coordinates on a workpiece surface; acceptance and reverification tests are specified in the ISO 10360 series.
ISO 10360 series · Dimensional