Reference Manual
00809-0100-4360, Rev BA
August 2008
Rosemount 1151
www.rosemount.com
Section 6 Retrofitting the Rosemount 1151
Transmitter
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 6-1
Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 6-1
Retrofitting Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 6-2
Removing the Analog Electronics Assembly . . . . . . . . . page 6-2
Installing the Smart Retrofit Kit . . . . . . . . . . . . . . . . . . . . . page 6-10
Characterization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 6-12
OVERVIEW This section describes how the Rosemount Smart Retrofit Kit can be used to
retrofit a Rosemount 1151AP, DP, GP, HP, or LT transmitter with
4-20 mA dc linear or square root output.
NOTE
The Rosemount 1151DR (Draft Range) Transmitter cannot be retrofitted with
the 1151-0935-0001 Retrofit Kit. In addition, Rosemount 1151 transmitters
with serial numbers below 10,000 and Rosemount 1151 AP Range Code 4
Transmitters with serial numbers between 1,318,500 and 1,690,000 may
experience some degradation in performance from temperature effect if
retrofitted. Therefore, retrofitting of these transmitters is not recommended.
SAFETY MESSAGES
Warnings ( ) Procedures and instructions in this section that raise potential safety issues
are indicated by a warning symbol ( ). Refer to the following warning
messages before performing an operation preceded by this symbol.
• Explosions can result in serious injury or death. Before connecting a
communicator in an explosive atmosphere, make sure the instruments in the loop
are installed in accordance with intrinsically safe or nonincendiary field wiring
practices.
• Toxic processes can result in serious injury or death. Transmitter can contain
residue process. Use appropriate safety precautions when opening drain vents or
disconnecting a transmitter from a process.
• DO NOT attempt to loosen drain vent valves or disconnect the transmitter from
the process without taking precautionary measures.
• Install and tighten all four process adapter bolts or drain vent valves before
applying pressure.
• Both transmitter covers must be fully engaged to meet explosion-proof
requirements.
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