Rosemount 8800D Series User Manual

Reference Manual
00809-0100-4003, Rev BA
August 2010
Rosemount 8800D
C-8
Example 3 (English units)
Therefore, an input frequency of 700.00 Hz represents a flow rate of 5569.4
SCFM in this application.
For a given input frequency, you may also determine the current output. Use
the above example with an input frequency of 200 Hz.
URV= 5833 SCFM LRV= 0 SCFM F
in
(Hz) = 200.00
= 8.36 mA
Therefore, an input frequency of 200 Hz represents a current output of 8.36
mA.
Fluid
= Natural gas URV
= 5833 SCFM
Line size
= 3 in. LRV = 0 SCFM
Line pressure
= 140 psig C
20
= C
x
/sp. units factor
(from Table C-1 on
page C-5)
Operating
Temperature
= 50 °F Density () = 0.549 lb/cu-ft
(oper)
Viscosity
= 0.01 cp Input
Frequency
= 700 Hz
K-factor
(compensated)
= 10.678 (via Field
Communicator or AMS)
Q
= F(Hz) /(K x C
20
) where: C
20
= C
12
/10.71 (Density Ratio)
= 700/{10.797 x (0.124675/10.71)}
= 5569.4 SCFM
I
FHzKC
20
 LRV–
URV LRV–
--------------------------------------------------------------- -
16




4+=
I
200 10.797 0.0116410–
5833 0–
----------------------------------------------------------------------------------
16



4+=

Rosemount 8800D Series Specifications

General

Type	Vortex Flow Meter
Measurement Principle	Vortex Shedding
Operating Temperature	-40 to 185°F (-40 to 85°C)
Storage Temperature	-40 to 185°F (-40 to 85°C)
Communication Protocols	FOUNDATION Fieldbus
Material	316 stainless steel
Fluid Type	Liquid, Gas, Steam
Line Size	1/2 to 8 inches (15 to 200 mm)
Approvals	ATEX, IECEx, CSA, FM
Output Signal	4-20 mA
Process Connection	Flanged, Wafer, Threaded
Electrical Connection	M20
Protection Rating	IP66
Mounting Style	Wafer, Flanged