Emerson Rosemount 8600 Series, Справочное руководство, Страница: 123 / 130

115 Rosemount 8600 Vortex Flow Meter
Reference Manual
May 2019
Electronics Verification
00809-0100-4860, Rev BF
Example 2 (SI units)
Therefore, an input frequency of 650.00 Hz represents a flow rate of 3446.4 kg/hr in this
application.
For a given input frequency, you may also determine the current output. Use the prior
example with an input frequency of 275 Hz:
URV= 3600 kg/hr LRV= 0 kg/hr F
in
(Hz) = 275
= 10.48 mA
Therefore, an input frequency of 275.00 Hz represents an output current of 10.48 mA.
Fluid = Saturated Steam URV = 3600 kg/hr
Line size = 80 mm. LRV = 0 kg/hr
Line pressure = 700 kPas C
16
= C
11
/

from Table C - 1
on page110 )
Operating
Temperature
= 170 °F Density(

) = 4.169 kg/cu-mtr
(operating)
Viscosity = 0.015 cp
Input
Frequency
= 650 Hz
K-factor
(compensated)
= 10.715 (via Field Communicator or AMS)
M = F(Hz) /(K x C
16
)
= 650/{10.715 x (C
11
/

= 650/{10.715 x (0.0733811/4.169 
= 650/(10.715 x 0.017602

= 3446.4 kg/hr
I
F Hz
 
K C
16
 
LRV –
URV LRV –
-----------------------------------------------------------
16   
 
 
4 + =
I
275 10.715 0.017602
  
0 –
  
3600 0 –
----------------------------------------------------------------------------------
16  

 
 
 
4 + =