Emerson 8800A, Product Manual

Page: 15 / 160

2-5
Installation
Upstream/Downstream Piping
The vortex meter may be installed with a minimum of ten straight pipe
diameters (D) upstream and five straight pipe diameters (D)
downstream.
Rated accuracy is based on the number of pipe diameters from an
upstream disturbance. An additional 0.5% shift in K-factor may be
introduced between 10 D and 35 D, depending on disturbance. For more
information on installation effects, see Technical Data Sheet
00816-0100-3250. This effect can also be corrected in the electronics.
See Installation Effect on page 3-13.
Pressure and Temperature Transmitter Location
When using pressure and temperature transmitters in conjunction
with the Model 8800C for compensated mass flows, install the
transmitter downstream of the Vortex Flowmeter. See Figure 2-4.
Figure 2-4. Pressure and Temperature Transmitter Location
Wetted Material Selection
Ensure that the process fluid is compatible with the meter body wetted
materials when specifying the Model 8800C. Corrosion will shorten the
life of the meter body. Consult recognized sources of corrosion data or
contact your Rosemount Sales Representative for more information.
Environmental
Considerations
Avoid excessive heat and vibration to ensure maximum flowmeter life.
Typical problem areas include high-vibration lines with integrally
mounted electronics, warm-climate installations in direct sunlight, and
outdoor installations in cold climates.
Although the signal conditioning functions reduce susceptibility to
extraneous noise, some environments are more suitable than others. Avoid
placing the flowmeter or its wiring close to devices that produce high
intensity electromagnetic and electrostatic fields. Such devices include
electric welding equipment, large electric motors and transformers, and
communication transmitters.
4 Downstream
6 Downstream
P T
88
0
0
-8
80
0G
15
A