Glossary C

Glossary

SI Units:

 

Pressure

MPa

Ao

m2

b1

m2/m2/MPa

b2

m2/m2/MPa2

c

m2/m2/oC

Mass

kg

Head Height

cm

Elevation

m

Length

m

Sink Rate

cm/min

Vacuum

mtorr

Temperature

oC

Trim

g

Gravity

cm/sec2

Density

g/cm3

Humidity

% RH

Sink Rate

Rate of descent of piston into cylinder.

Sleeve Mass Offset

Offset is used when a low mass sleeve is used and is loaded with additional masses.

Standard Deadweight Gauge (Dwg A)

Known gauge that other devices are compared against.

Temperature, Ambient

Temperature of the room.

Temperature, DWG

Temperature of the gas or oil measured at the deadweight gauge.

Temperature Factor

Correction for the effect of temperature on the area of the piston.

Temperature, Reference

Temperature selected by manufacturer for reporting piston/cylinder area.

Test Deadweight Gauge (Dwg B)

Unknown gauge in a cross-float calibration.

True Density

Actual density of the mass or piston.

True Mass

Mass based on actual material density as if weighted in vacuum; a.k.a. Newtonian Mass.

Uncertainty

The amount of possible error in the value.

Vacuum

The difference between absolute vacuum and the vacuum actually used.

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Fluke 2470 specifications Sink Rate

2470 specifications

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