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Reference Manual
00809-0100-4514, Rev BA
January 2008
Rosemount 1154
5-4
DISASSEMBLY
PROCEDURE
Process Flange Removal
NOTE
Numbers in parentheses refer to item numbers in Figure 5-2 on page 5-5.
NOTE
The Rosemount 1154 Pressure Transmitter contains electronic circuit boards
which may be static sensitive.
NOTE
Read the Process Flange Reassembly Procedure on page 5-8 before
attempting disassembly. Special testing and traceability are required.
1. Remove the transmitter from service before disassembling flanges.
2. Detach process flanges (13, 15) by removing the four large bolts (14).
Take care not to scratch or puncture the isolating diaphragms.
Identify high and low (“H” and “L”) flanges for reassembly.
NOTE
Carefully remove the O-rings (11) from the cell if they do not come off when
the flange is removed. Do not pry the O-ring from its seat, as you may
damage the isolating diaphragm.
3. Clean isolating diaphragms with a soft rag and a mild cleaning
solution. Do not use any chlorine or acid solutions to clean the
diaphragms. Rinse diaphragms with distilled water.
Process O-rings may retain some process fluid after disassembly of process
flanges. If this fluid is determined to be contaminated, take appropriate safety
measures.