Emerson Rosemount 2151N Reference Manual page 67

Reference Manual
00809-0000-4851 Rev AD
December 2023
Electronics Housing Cover
Installation
Maintenance & Troubleshooting
1. Inspect the housing (5) and cover (1) threads for
cleanliness. If chips or dirt are present, clean the o-
ring seat and mating threads on the housing and
cover with a soft brush.
2. Carefully replace each cover, ensuring that each
contains a cover o-ring (2) (See Preliminary Section
above). Take care that electrical wires do not
interfere with cover installation or wire damage could
occur.
NOTE
Housing covers are pre-lubricated and do not require
additional lubrication.
3. Tighten cover until it makes metal-to-metal contact
with the housing (see Figure 2-8 in Section 2:
Installation). Once metal-to-metal contact has been
made, it is not necessary to tighten the cover any
further.
4. Visually inspect both covers to ensure they are
installed metal-to-metal. Visual inspection is sufficient
to ensure metal-to-metal contact; however, a gap
gauge may be used for verification if desired. When
metal-to-metal contact has been made, the
acceptable gap between cover and housing will be
less than 0.010 inch (see Figures 2-9 and 2-10).
Rosemount 2151N
58