Rosemount 8800D Series User Manual

Reference Manual
00809-0100-4003, Rev BA
August 2010
Rosemount 8800D
C-4
Figure C-2. Test Frequency Output and Chassis Ground Points.
Calculating Output
Variables with Known
Input Frequency
Use the following equations with a known input frequency for verification of a
flow rate or 4–20 mA output within a given calibrated range. Select the proper
equation depending on if you are verifying a flow rate, mass flow rate, 4–20
mA output, or special units. Example calculations starting on page C-6 may
clarify how these equations are used.
To Verify a Flow Rate
For a given frequency F (Hz), and K-factor (compensated), find the
flow rate Q:
where C
x
is the unit conversion (Table C-1 on page C-5).
To Verify a Standard or Normal Flow Rate
To Verify a Mass Flow Rate
For a given mass frequency F (Hz), and K-factor (compensated), find the
mass flow rate M:
where C is the unit conversion and
 is density at operating conditions:
where C
x
is the unit conversion using density () (Table C-1 on page C-5).
Ground
Test Frequency In
Test Point 1
QFHzKC
x
=
QFHz DensityRatio KC
x
 =
M
F
K  C
-------------------------=
MFHzKC
x
=

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