KEP ES749 - Uncompensated Flow Computation

ES749 Flow Computer
99
Uncompensated Flow Computation:
Pulse, Linear Case
input frequency • Time Scaling Factor
volume ow =
K-Factor • [1 - Meter Exp.Coeff. • ( Tf - T
cal
)]
Analog, Linear Case
Measured Input Flow
volume ow =
[1 - Meter Exp.Coeff. • ( Tf - T
cal
)]
Square Law Case
DP Factor 2•delta P
1/2
volume ow = • Y •
[1 - Meter Exp.Coeff. • ( Tf - T
cal
)] density
Square Law , Target Flowmeter Case
√ density cal.
volume ow = input ow •
√ density owing
Pulse, Linearization Case
input frequency • Time Scaling Factor
volume ow =
K-Factor(Hz) • [1 - Meter Exp.Coeff. • ( Tf - T
cal
)]
Analog, Linearization Case
Input Flow • Correction Factor (Input Flow )
volume ow =
[1 - Meter Exp.Coeff. • ( Tf - T
cal
)]
Square Law, Linearization Case
DP Factor(RN) 2•delta P
1/2
volume ow = • Y •
[1 - Meter Exp.Coeff. • (Tf - Tcal)] density
Pulse, UVC Case
input frequency • Time Scaling Factor
volume ow =
K-Factor (Hz/cstks) • [1 - Meter Exp.Coeff. • ( Tf - T
cal
)]
Shunt Flow Bypass Flowmeter
input frequency • 457 • Epa • Y
m
volume ow =
√ owing density • DC • bypass calibration favtor
Gilo Flowmeter
volume ow at owing conditions = input ow at design conditions •
NOTE: Therm.Exp.Coef is 10
-6
[ ]
[ ]
7.3.12
Uncompensated
Flow Computation
calibration density
owing density
√