Design and function
D184B097U02
FV4000 / FS4000
19
Consequently, the vortex shedding frequency to be evaluated is dependent solely upon the flow
velocity and not at all upon media density and viscosity.
The local changes in pressure induced by vortex shedding are detected by a piezo sensor and
converted into electrical pulses corresponding to the vortex frequency.
The frequency signal from the flowmeter sensor, which is proportional to the flow, undergoes
downstream processing in the transmitter.
G00602
L
St
Re
Fig. 7:
How the Strouhal number is dependent upon the Reynolds number
St = Strouhal number
Re = Reynolds number
L = Linear flow area
Summary of Contents for FS4000
Page 1: ...Operating Instruction D184B097U02 Vortex Flowmeter Swirl Flowmeter FV4000 FS4000 ...
Page 116: ...Appendix 116 FV4000 FS4000 D184B097U02 ...
Page 117: ...Appendix D184B097U02 FV4000 FS4000 117 ...
Page 118: ...Appendix 118 FV4000 FS4000 D184B097U02 ...
Page 119: ...Appendix D184B097U02 FV4000 FS4000 119 ...
Page 120: ...Appendix 120 FV4000 FS4000 D184B097U02 ...
Page 125: ......