Reference Manual
00809-0100-4793, Rev CA
August 2004
3-15
Rosemount 8742C
Figure 3-16. Grounding with
Grounding Electrodes
PROCESS LEAK
PROTECTION
(OPTIONAL)
The Rosemount 8705 Flowtube housing is fabricated from carbon steel to
perform two separate functions. First, it provides shielding for the flowtube
magnetics so that external disturbances cannot interfere with the magnetic
field and thus affect the flow measurement. Second, it provides the physical
protection to the coils and other internal components from contamination and
physical damage that might occur in an industrial environment. The housing is
completely welded and gasket-free.
The three housing configurations are identified by the W0, W1, or W3 in the
model number option code when ordering. Below are brief descriptions of
each housing configuration, which are followed by a more detailed overview.
•
Code W0
— sealed, welded coil housing (standard configuration)
•
Code W1
— sealed, welded coil housing with a relief valve capable of
venting fugitive emissions to a safe location (additional plumbing from
the flowtube to a safe area, installed by the user, is required to vent
properly)
•
Code W3
— sealed, welded coil housing with separate electrode
compartments capable of venting fugitive emissions (additional
plumbing from the flowtube to a safe area, installed by the user, is
required to vent properly)
Earth
Ground
871
1-0360A
01A
Содержание 8700 Series
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