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H,O
is the pressure drop from Figure l-4
Figure 14.
Gross Pressure Drop Characteristic Curve on Water
5
PSID
SpGr
is the specific gravity
H,O
where:
Cpse is viscosity in centipoise
PSID
(SpGr)”
x
(Cpsel”
x
PSID
=
flowrate
and the fluids viscosity and density.
FTB500 Series
Turbine Meter given the pressure drop on water at the maximum
FTB500
Series Turbine Meter.
The K-Factor is the number of pulses per unit volume produced by the
flowmeter under a given set of conditions. Repeatability is a measure of the
stability of the output under a given set of flowing conditions. The
repeatability is defined as the allowable percentage deviation from the
stated K-Factor.
The pressure drop characteristics are given based on water at a viscosity
of 1 Cpse and a specific gravity of 1.00. For other fluid ’s, the following equa-
tion may be used to estimate the pressure drop across the
*2%
are possible using smart transmitters which can store the
entire characteristics of the
*l%
of
reading are typical after initial correction for offset. Better accuracies ap-
proaching
FTB500
Series Turbine Meter requires the use of a linearization con-
ditioner available in all OMEGA instrumentation. Accuracies of
Over the linear flow range, the input/output characteristics takes the form of:
Equation 1
Frequency = C, x Flowrate-C,
The