Emerson Rosemount 1152 Alphaline, Reference Manual

Page: 45 / 68

Reference Manual
00809-0100-4235, Rev BA
April 2007
5-5
Rosemount 1152
Removing Sensor
Module from Electrical
Housing
1. Remove flanges per “Process Flange Removal” on page 5-3.
2. Remove amplifier board and calibration board as described in
“Electrical Housing Disassembly” on page 5-4.
3. Loosen the lock nut (17).
4. Unscrew the sensor module (24) 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.
Be careful not to
damage the isolating diaphragms when unscrewing the sensor
module.
Then carefully pull the header assembly board (10) through
the hole.
5. The sensor module (24) is a welded 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 1152 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 isopropyl alcohol, if necessary, and lightly
grease the O-ring with Dow Corning
®
55 Silicone O-ring Grease
(RMT P/N 01153-0248-0001 or P/N 01153-0053-0001). Spray the
inside threads of the electronics covers with cover lubricant (RMT 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 sensor module, clean the thread sealant from the
sensor threads, lock nut, and electronics housing threads with a wire
brush.
NOTE
Spare Range Codes 8, 9, and 10 sensor modules are no longer compatible
with the A output.