Emerson Rosemount 753R, Reference Manual

Page: 47 / 60

Reference Manual
00809-0100-4379, Rev AA
March 2006
6-3
Rosemount 753R Indicator
DISASSEMBLY
PROCEDURES
Do not remove the instrument cover in explosive atmospheres when the
circuit is live.
Remove from Service
Be aware of the following:
• Follow all plant safety rules and procedures.
• Isolate and vent the process from the transmitter before removing the
transmitter from service.
• Remove all electrical leads and conduit.
• Detach the process flange by removing the four flange bolts and two
alignment screws that secure it.
• Do not scratch, puncture, or depress the isolating diaphragms.
• Clean isolating diaphragms with a soft rag and a mild cleaning solution,
and rinse with clear water.
• Whenever you remove the process flange or flange adapters, visually
inspect the Teflon o-rings. Replace the o-rings if they show any signs of
damage, such as nicks or cuts. If they are not damaged, reuse them.
The 753R transmitter is attached to the process connection by four bolts and
two cap screws. Remove the bolts and separate the transmitter from the
process connection. Leave the process connection in place and ready for
re-installation.
Remove from Service
To remove a wireless indicator from service, “Decommissioning Procedures”
on page 2-8.
Remove Terminal Block
Electrical connections are located on the terminal block in the compartment
labelled “FIELD TERMINALS.”
PlantWeb Housing
Loosen the two small screws located at the 10 o'clock and 4 o'clock positions,
and pull the entire terminal block out.