Test Process that measures the conventional value of the result of weighing a body in air equals the mass of a standard that balances this body under the following conventionally chosen conditions:
- ambient temperature 20 °C
- air density 1.2 mg/cm³
- mass density 8.000 g/cm³
Conventional mass has the same unit as mass (the kilogram), because the multiplication of a mass by a dimensionless quantity defines its values. Labs typically measure mass and correct the results from actual to conventional conditions.
“Apparent Mass versus 8.0 g/cm³” formerly equated to conventional mass in the United States.
References:
NISTIR 6969 (2019) https://www.nist.gov/publications/nistir-6969-selected-laboratory-and-measurement-practices-and-procedures-support-1
OIML D28 (2004) https://www.oiml.org/en/files/pdf_d/d028-e04.pdf
NIST Handbook 44:
Required Parameters
- Mass {kg, lb, gr, t}
Optional Parameters
- Density (Other than Stainless Steel)
Measured Value & Uncertainty
- Mass