Honeywell EC350 User Manual

1.3 Theory of Operation
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Correction Factors to Metered Volume
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Pressure Factor Fp
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Temperature Factor Ft
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Supercompressibiity Factor Fpv
1.3.1 Correction Factors to Metered Volume
Ideal or perfect gases follow the relationship of Boyle’s Law for pressure effect and Charles’ Law for
temperature effect, which can be stated: The volume of any definite weight of a perfect gas varies inversely
with change in absolute pressure and directly with change in absolute temperature. The equation for this
relationship of the two laws is expressed as follows:
The Symbols V1, P1 and T1 refer to the original volume, pressure and process temperature while V2, P2
and T2 refer to the volume, pressure and temperature of the new or changed conditions. Rearranging the
equation and rewriting subscripts, we can express it as follows:
Where:
Vb = gas volume (cu. Ft.) at base condition corrected
Pb = absolute base pressure (psia)
Tb = absolute base temperature (deg. R)
Vm = gas volume metered (cu. Ft.) uncorrected
Pm = absolute meter pressure (psia)
Tm = absolute meter temperature (deg. R)
1 About EC350
1.3 Theory of Operation
Honeywell 2024
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Honeywell EC350 Specifications

General

Brand	Honeywell
Model	EC350
Category	Measuring Instruments
Language	English