Fluke 2470 specifications +Inf, -Inf

Glossary C

Glossary

Head Height

Vertical distance between reference planes. A positive value indicates the Device Under Test is higher than the standard.

Head Correction

Pressure correction for head height.

Humidity

Current ambient relative humidity. Used to compute air density if not entered as a constant.

+INF, -INF

Infinity. The number is bigger than can be represented. Computing altitude at zero pressure will give this value.

L1

Distance from the top of the mass loading surface to the bottom of the piston.

Latitude

Distance from the equator in degrees and minutes of latitude. Used to compute local gravity if not entered as a constant.

Mass, Apparent

May be Apparent Mass versus Brass Standards or Apparent Mass versus Steel Standards. An expression of the effective mass of a given object with an assumed density, typically that of the standard used to measure the mass value. In a practical sense, Apparent Mass versus Brass Standards describes what an object appears to weigh when compared to a brass standard in the presence of a buoyant atmosphere. See also Buoyancy; Reference Density; True Mass; and Density of Air.

Mass, Nominal

Pressure converted to mass before corrections are applied.

Mass, Tare

Mass of the least number of components required to generate a pressure, in many cases the piston only.

Mass, Total

Mass used to generate a pressure. Included both platter masses and trim masses.

Mass, Trim

Small masses used to generate an exact pressure.

Mass, True

A quantitative expression of the amount of matter in an object. See also Mass Apparent

Mass Set File

Contains all information for a mass set.

Medium

The fluid or gas used to generate pressure.

+NAN, -NAN

Not A Number. The value cannot be computed (i.e., division by zero).

Piston/Cylinder File

Contains all information for a single piston/cylinder set.

Pressure, Ambient

Local atmospheric pressure.

Pressure, Corrected

Pressure after corrections have been applied.

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