MABC {masscor} | R Documentation |
Magnitude of the Air Buoyancy Correction
Description
Calculates the Magnitude of the Air Buoyancy Correction (MABC). If no parameters are provided the function returns MABC for weighing water at standard conditions.
Usage
MABC(rho = 0.997, rho_w = 8, rho_air = airDensity())
Arguments
rho |
density of the sample in |
rho_w |
density of the weigths in |
rho_air |
density of the air in |
Details
Comparing masses (weighing) in air produces results that are influenced by the objects densities due to their buoyancy in air. This air buoyancy effects are usually small but must be taken in account when high accuracy is required. The effect can be corrected by using the densities of the object, the mass standard and the air filling the room where the measurement process takes place (Harris, 2019).
The uncertainty associated to MABC can be calculated by the function uncertMABC()
.
Value
Numeric value of the Magnitude of the Air Buoyancy Correction factor.
References
Harris, G. (2019). Selected Laboratory and Measurement Practices and Procedures to Support Basic Mass Calibrations. SOP 2 - Recommended Standard Operating Procedure for Applying Air Buoyancy Corrections. National Institute of Standards and Technology (NIST). doi:10.6028/NIST.IR.6969-2019
See Also
uncertMABC()
, airDensity()
, uncertMABC()
Examples
## Magnitude of the air buoyancy correction for some materials:
# Water
MABC()
# Zinc metal
MABC(rho = 7.133)
# Copper metal
MABC(rho = 8.96)