Emerson Rosemount 1152 Alphaline, Справочное руководство

Страница: 47 / 68

Reference Manual
00809-0100-4235, Rev BA
April 2007
5-7
Rosemount 1152
Connecting Electrical
Housing to Sensor
Module
1. Run the lock nut down to the base of the sensor module threads.
2. Apply a heavy, continuous bead (about 3 /
8
in. wide) of Loctite ®
580-PST sealant (RMT P/N 01153-0329-0001) around the top sensor
module threads.
3. Insert the header assembly board (10) through the hole in the bottom
of the electronics housing.
4. Screw the sensor module (24) into the electrical housing (3), ensuring
that five full threads are engaged. Be careful not to damage or twist
the sensor module leads. Turn the header board to avoid twisting
wires.
5. Align the sensor module with the high and low pressure sides
oriented per Figure 2-1 on page 2-4, as applicable. Alternately,
tighten the module one-half turn further to reverse the orientation of
the module about the electronics housing.
6. Tighten the lock nut (17) to 35 ft-lb (47.5 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.
Electrical Housing
Assembly
1. Replace the zero and span adjustment screw O-rings (5) whenever
you remove the zero or span adjustment screws (4). Lightly grease
the O-rings with Dow Corning 55 Silicone O-ring Grease (RMT P/N
01153-0248-0001 or P/N 01153-0053-0001). Reinstall the adjustment
screws and secure with snap rings (6).
2. Align the zero and span adjustment screws with the potentiometer
stems on the calibration board (11) and push the calibration board
onto the bayonet pins.
3. Secure the calibration board with the three standoffs (12). The
upper-right-hand standoff grounds the electronics to the case and
must be firmly in place.
4. Slide the header assembly board (10) onto the bayonet pins with the
component side toward the pins. Slide excess wire behind the
calibration board, taking care to avoid kinks.
5. Push the amplifier board (13) onto the bayonet pins. Connect the heat
sink screw (A, D, and L outputs only) and secure the amplifier board
with the three holding screws (14).
6. Carefully replace the cover (1) and tighten to 16.5 ft-lb (22.4 N-m)
(see “Preliminary” on page 5-5).
7. Replace the nameplate (8) and attach with two nameplate
screws (7).
Process Flange
Reassembly
1. Replace the flange O-rings with new O-rings if the flanges were
removed. Lightly grease new flange O-rings with Dow Corning
®
111
Silicone Grease (RMT P/N 01153-0334-0001).
2. Carefully place an O-ring (23) in the isolator well of the high side (“H”)
of the sensing module. On Range Code 10 transmitters, add a
backup ring over the O-ring as shown in Figure 5-3 on page 5-8.