Emerson Rosemount 8600D Series Reference Manual page 138

Appendix C: Electronics verification
January 2013
Example 3 (SI units)
Fluid
Line size
Line pressure
Operating
Temperature
Viscosity
Input
Frequency
K-factor
(compensated)
Q
Therefore, an input frequency of 700.00 Hz represents a flow rate of 9259.2 NCMH in this
application.
For a given input frequency, you may also determine the current output. Use the prior example
with an input frequency of 375 Hz.
URV= 10000 NCMH LRV= 0 NCMH F
= 11.94 mA
Therefore, an input frequency of 375.00 Hz represents a current output
of 11.94 mA.
130
= Natural gas
= 80 mm
= 1000 KPas
= 10 °F
= 0.01 cp
= 700 Hz
= 10.797 (via Field
Communicator or AMS)
= F(Hz) /(K x C ) where: C
20
= 700/{10.797 x (.0733811/10.48)}
= 9259.2 NCMH

     
F Hz K C
–
I = 20

--------------------------------------------------------------- -
URV LRV
–

   
375 10.797 0.0070020

I = ------------------------------------------------------------------------------------- -

10000 0
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URV = 10,000 NCMH
LRV = 0 NCMH
C = C
20
(from
page C-125

Density ( ) = 9.07754 kg/cu-mtr
(operating)
= C /10.48 (Density Ratio)
20 11
(Hz) = 375.00
in

LRV
  
16 + 4

 0 
–


16
–
Reference Manual
00809-0100-4860, Rev BC
/sp. units factor
x
Table C-1 on
)



+ 4

Electronics verification