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Reference Manual
00809-0100-4697, Rev EA
October 2011
Rosemount 848T
www.rosemount.com
Section 2 Installation
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-1
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-1
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-4
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-8
Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-10
Tagging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-11
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-12
SAFETY MESSAGES Instructions and procedures in this section may require special precautions to
ensure the safety of the personnel performing the operations. Information that
potentially raises safety issues is indicated by a warning symbol ( ). Please
refer to the following safety messages before performing an operation
preceded by this symbol.
Warnings
MOUNTING The 848T is always mounted remote from the sensor assembly. There are
three mounting configurations:
• To a DIN rail without an enclosure
• To a panel with an enclosure
• To a 2-in pipe stand with an enclosure using a pipe mounting kit
Failure to follow these installation guidelines could result in death or
serious injury.
• Make sure only qualified personnel perform the installation.
Process leaks could result in death or serious injury.
• Do not remove the thermowell while in operation. Removing while in operation may
cause process fluid leaks.
• Install and tighten thermowells and sensors before applying pressure, or process
leakage may result.
Electrical shock could cause death or serious injury.
• If the sensor is installed in a high voltage environment and a fault condition or
installation error occurs, high voltage may be present on transmitter leads and
terminals.
• Use extreme caution when making contact with the leads and terminals.