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Reference Manual
00809-0100-4631, Rev BA
April 2007
Rosemount 1154 Series H
5-4
Removing Module
Shroud From Electrical
Housing
1.
Remove amplifier board and calibration board as described in the
Electrical Housing Disassembly Section above.
2.
Loosen the lock nut (9).
3.
Unscrew the module shroud (8) from the electronics housing,
simultaneously turning the header board and leads to prevent them
from being twisted or damaged. The threaded connection has a
sealing compound on it and must be broken loose. Then carefully pull
the header assembly board (4) through the hole.
4.
The module shroud (8) containing the sensor module is a complete
assembly and cannot be further disassembled.
REASSEMBLY
PROCEDURE
NOTE
Numbers in parentheses refer to item numbers in Figure 5-2 on page 5-6.
NOTE
The Rosemount 1154 Series H Pressure Transmitter contains electronic
circuit boards which may be static sensitive.
Preliminary
1.
Replace the cover O-rings (2) whenever you remove a cover. Clean
the sealing areas with alcohol, if necessary, and lightly grease the
O-ring with Dow Corning
®
55 Silicone O-ring Grease (Rosemount
Part Number 01153-0248-0001 or P/N 01153-0053-0001). Spray the
inside threads of the electronics covers with cover lubricant
(Rosemount P/N 01153-0333-0001 or equivalent) if necessary. If
covers are already sufficiently lubricated, do not spray.
2.
Verify that the circuit boards are clean.
3.
Verify that the bayonet pins on the connection board are clean.
4.
If you remove the module shroud, clean the thread sealant from
module shroud threads, lock nut, and electronics housing threads
with a wire brush.
Connecting Electrical
Housing to Module
Shroud
1.
Run the lock nut down to the base of the sensor threads.
2.
Apply a heavy, continuous bead (about
3
/
8
-in. wide) of Loctite
®
580-PST sealant (Rosemount Part Number 01153-0329-0001)
around the top module shroud threads.
3.
Insert header assembly board (4) through the hole in the bottom of
the electronics housing.
4.
Screw module shroud (8) into electrical housing (3) making sure that
five full threads are engaged. Be careful not to damage or twist the
sensor leads. Turn the header board to avoid twisting wires.
5.
Align the module shroud with the high and low pressure sides
oriented per Figure 2-5 on page 2-8. Alternately, tighten the module
shroud one-half turn further to reverse the orientation of the module
shroud about the electronics housing.
6.
Tighten the lock nut (9) to 35 ft-lb (48 N-m) torque.
7.
Wipe off excess sealant.
8.
Place the assembled unit in an oven at 200 ± 5 °F (93 ± 3 °C) for
12 hours to cure the sealant.
Summary of Contents for Rosemount 1154DH
Page 6: ...Reference Manual 00809 0100 4631 Rev BA April 2007 Rosemount 1154 Series H 1 2 ...
Page 10: ...Reference Manual 00809 0100 4631 Rev BA April 2007 Rosemount 1154 Series H TOC 4 ...
Page 12: ...Reference Manual 00809 0100 4631 Rev BA April 2007 Rosemount 1154 Series H 1 2 ...
Page 52: ...Reference Manual 00809 0100 4631 Rev BA April 2007 Rosemount 1154 Series H 6 10 ...
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