Fluid Components International GF03 User Manual
Page 48
FLUID COMPONENTS INTERNATIONAL LLC http://www.fluidcomponents.com
Model GF03 Flow Meter
4 4
Doc. No. 06EN003352 Rev. B
Example:
Q
A
=
1212.7 ACFM
Q
S
=
1485 SCFM
P
A
=
19.7 PSIA
T
A
=
120°F (580°R)
P
S
=
14.7 PSIA
T
S
=
70°F (530°R)
NOTE: The rated outputs of fans, blowers or compressors cannot be accurately compared
to the flow rate output of the GF series flowmeter.
Swirling Flow and the Length of the Meter Section
The GF series flowmeter is calibrated in a non-rotating flow stream with the streamline
parallel to the pipe walls. Rotation of the flow stream or a flow stream that is not parallel to
the pipe walls may cause flow measurement errors. A straight pipe run of 20 pipe diameters
upstream and 10 pipe diameters downstream generally produces a desirable flow stream.
Elbows, valves, and other obstructions, located close to the GF Series Flowmeter may cause
an indeterminate error in the flow rate measurement. If a shorter pipe run distance is needed,
a flow conditioner can be installed with the flow element. Contact an FCI representative for
more information.
SCFM
1485
PSIA
14.7
R
530
R
580
PSIA
19.7
1
ACFM
1212.7
=
°
°
In-Depth
Troubleshooting
The Installation
In-Depth
Troubleshooting
The Process
Verify Proper Orientation
The flow element must be oriented as described on the "Instrument Information Sheet" located
in the back of this manual. Verify that the flat on the flow element is parallel to the pipe and
the flow arrow is pointed in the direction of the flow stream. Improper orientation will cause
an indeterminate amount of error in the flow measurement. See Chapter 2 for instructions on
proper installation.
Verify Proper Insertion Depth
The flow element's thermowells must be located at the center line of the pipe unless the factory
specifies otherwise. Improper insertion depth will cause an indeterminate amount of error in
the flow measurement. See Chapter 2 for instructions on proper installation.
Verify Standard versus Actual Process Conditions
The flowmeter can measure the mass flow rate if mass units of flow are selected. The mass
flow rate is the mass of the gas flowing through a pipe per time. Other flowmeters, such as
an orifice plate or a pitot tube, measure the volumetric flow rate. The volumetric flow rate is
the volume of gas per time. If the readings displayed by the GF series flowmeters do not agree
with another instrument, some calculations may be necessary before comparing them. To
calculate the mass flow rate, the volumetric flow rate, and the pressure and temperature at the
point of measurement must be known. Use the following equation to calculate the mass flow
rate (standard volumetric flow rate) for the other instrument.
Equation:
Q
Q
S
A
=
Ч
Ч
P
T
T
P
A
A
S
S
Where:
Q
A
=
Volumetric Flow
Q
S
= Standard Volumetric Flow
P
A
=
Actual Pressure
T
A
= Actual Temperature
P
S
=
Standard Pressure
T
S
= Standard Temperature
Pressure and Temperature are in absolute units.