Emerson 8800A, Product Manual

Page: 23 / 160

2-13
Installation
Flowmeter Grounding
Grounding is not required in typical vortex applications; however, a
good ground will eliminate possible noise pickup by the electronics.
Grounding straps may be used to ensure that the meter is grounded to
the process piping. If you are using the transient protection option (T1),
grounding straps are required to provide a good low impedance ground.
To use grounding straps, secure one end of the grounding strap to the
bolt extending from the side of the meter body and attach the other end
of each grounding strap to a suitable ground.
Electronics Considerations
Both integral and remote mounted electronics require input power at
the electronics. For remote mount installations, mount the electronics
against a flat surface or on a pipe that is up to two inches in diameter.
Remote mounting hardware includes a bracket that is polyurethane
painted carbon steel and one carbon steel u-bolt. See Figure 2-16 on
page 2-24 for dimensional information.
High-Temperature Installations
Install the meter body so the electronics are positioned to the side of or
below the pipe as shown in Figure 2-2 on page 2-4. Insulation may be
required around the pipe to maintain a temperature below
185 °F (85 °C).
Conduit Connections
The electronics housing has two ports for 1 /
2
–14 NPT conduit
connections. Adapters are also available for PG 13.5 or M20 1.5
conduit. These connections are made in a conventional manner in
accordance with local or plant electrical codes. Be sure to properly seal
unused ports to prevent moisture or other contamination from entering
the terminal block compartment of the electronics housing.
NOTE
In some applications it may be necessary to install conduit seals and
arrange for conduits to drain to prevent moisture from entering the
wiring compartment.
High-Point Installation
Prevent condensation in any conduit from flowing into the housing by
mounting the flowmeter at a high point in the conduit run. If the
flowmeter is mounted at a low point in the conduit run, the terminal
compartment could fill with fluid.
If the conduit originates above the flowmeter, route conduit below
the flowmeter before entry. In some cases a drain seal may need to
be installed.