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Rosemount Model 8800C Vortex Flowmeter with FOUNDATION
TM
Fieldbus
9-8
Example 2 (English Units)
In this application, an input frequency of 400.00 Hz represents a flow
rate of 19,271.2 lb/h.
Given:
• M = mass flow rate
• F = frequency: 400.00 Hz
• K = K-factor (compensated): 10.678 (via fieldbus configuration
tool)
•C
x
= C
17
•C
17
= C
13
/ρ (from Table 9-1 on page 9-6)
• ρ = density: 1.078 lb/ft
3
Other Conditions:
• Fluid = saturated steam
• Line size = 3 in.
• Line pressure = 500 psia
• URV = 40,000 lb/h
• LRV= 0 lb/h
• Operating temperature = 467 °F
• Viscosity = 0.017 cp
Equation:
Calculations:
M
F
KC
x
×
---------------
=
M
400
10.678 C
17
×
----------------------------
=
M
400
10.678 C
13
⁄()×
---------------------------------------
=
M
400
10.678 0.00207792 1.078
⁄()×
---------------------------------------------------------------
=
M
400
10.678 0.0019276
×
-----------------------------------------
=
M 19,271.2 lb/h
=