Reference Manual
00809-0100-4793, Rev CA
August 2004
Rosemount 8742C
3-2
Explosions could result in death or serious injury:
Installation of this transmitter in an explosive environment must be in accordance with the
appropriate local, national, and international standards, codes, and practices. Please review
the approvals section of the 8742C reference manual for any restrictions associated with a
safe installation.
Before connecting a HART-based communicator in an explosive atmosphere, make sure
the instruments in the loop are installed in accordance with intrinsically safe or
non-incendive field wiring practices.
Electrical shock can result in death or serious injury
Avoid contact with the leads and terminals. High voltage that may be present on leads can
cause electrical shock.
The flowtube liner is vulnerable to handling damage. Never place anything through the
flowtube for the purpose of lifting or gaining leverage. Liner damage can render the flowtube
useless.
To avoid possible damage to the flowtube liner ends, do not use metallic or spiral-wound
gaskets. If frequent removal is anticipated, take precautions to protect the liner ends. Short
spool pieces attached to the flowtube ends are often used for protection.
Correct flange bolt tightening is crucial for proper flowtube operation and life. All bolts must
be tightened in the proper sequence to the specified torque limits. Failure to observe these
instructions could result in severe damage to the flowtube lining and possible flowtube
replacement.
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