Manual

SP4000 Flow Computer
102
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Uncompensated Flow Computation:
Pulse, Linear Case
input frequency • Time Scaling Factor
volume flow =
K-Factor • [1 - Meter Exp.Coeff. • ( Tf - T
cal
)]
Analog, Linear Case
Measured Input Flow
volume flow =
[1 - Meter Exp.Coeff. • ( Tf - T
cal
)]
Square Law Case
DP Factor 2•delta P
1/2
volume flow = • Y •
[1 - Meter Exp.Coeff. • ( Tf - T
cal
)] density
Square Law , Target Flowmeter Case
√ density cal.
volume flow = input flow •
√ density flowing
Pulse, Linearization Case
input frequency • Time Scaling Factor
volume flow =
K-Factor(Hz) • [1 - Meter Exp.Coeff. • ( Tf - T
cal
)]
Analog, Linearization Case
Input Flow • Correction Factor (Input Flow )
volume flow =
[1 - Meter Exp.Coeff. • ( Tf - T
cal
)]
Square Law, Linearization Case
DP Factor(RN) 2•delta P
1/2
volume flow = • Y •
[1 - Meter Exp.Coeff. • (Tf - Tcal)] density
Pulse, UVC Case
input frequency • Time Scaling Factor
volume flow =
K-Factor (Hz/cstks) • [1 - Meter Exp.Coeff. • ( Tf - T
cal
)]
Shunt Flow Bypass Flowmeter
input frequency • 457 • Epa • Y
m
volume flow =
√ flowing density • DC • bypass calibration favtor
Gilflo Flowmeter
volume flow at flowing conditions = input flow at design conditions •
NOTE: Therm.Exp.Coef is 10
-6
7.3.12
Uncompensated
Flow Computa-
tion
calibration density
flowing density
√