Emerson Rosemount 8800D Series - SI Units; C.3.2 si Units

Electronics Verification
March 2016
Reference Manual
00809-0100-4772, Rev FA
159
Electronics Verification
C.3.2 SI units
Example 1
In this application, an input frequency of 80 Hz represents a flow rate of 1,686.8 lpm.
Given
 Q = flow rate
 F = frequency: 80 Hz
 K = K-factor (compensated): 10.772 (via fieldbus configuration tool)
 C
x
= C
8
– C
8
= 4.40287E-03 (from Table C-1 on page 156)
Other conditions
 Fluid = water
 Line size = 80 mm
 Line pressure = 700 kPag
 Operating temperature = 60 °C
Equation
Calculations
Example 2
In this application, an input frequency of 650 Hz represents a flow rate of 3,446.4 kg/hr.
Given
 M = mass flow rate
 F = frequency: 650.00 Hz
 K = K-factor (compensated): 10.715 (via fieldbus configuration tool)
 C
x
= C
16
– C
16
= C
11
/ρ (from Table C-1 on page 156)
 ρ = density: 4.169 lb/m
3
(operating)
Q
F
KC
x
×
-------------- -
=
Q
80
10.772 C
8
×
------------------------- -
=
Q
80
10.772 0.00440287
×
-------------------------------------------
=
Q 1,686.8 lpm=
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