Instruction Manual

Instruction Manual
D103216X012
L2sj Controller
January 2015
10
D Completely shut off the process to isolate the controller/sensor from process pressure.
D Provide a means of containing the process fluid before removing any measurement devices from the process.
D Vent any trapped process pressure.
D Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
Removing the Controller From the Sensor
1. Disconnect the supply and output pressure lines.
2. Slide the hook end of the zero spring (key 5, figure 6) over and off the controller end of the displacer rod (key 64,
figure 5).
3. Remove the four controller mounting screws (key 11, figure 6), and pull the controller straight away from the
sensor.
Replacing the Sensor O‐Rings
Refer to figure 5 for key number locations unless otherwise indicated.
Disassembly
1. Remove the controller from the sensor by following the procedure outlined in the previous section.
2. Remove the sensor from the tank.
3. Unscrew the hex nut (key 67) and remove the spacer (key 66) and spring (key 68). After removing the spring,
replace the spacer (key 66) and hex nut (key 67) on the displacer rod.
From the displacer end, pull the displacer rod away from the sensor connection (key 65) to pull the pivot base
(key 73) loose from the sensor connection. Remove the hex nut (key 67) to permit removing the displacer rod,
pivot base, pivot body, and spacer from the sensor connection.
4. Slide the pivot base (key 73), retaining ring (key 76), anti‐extrusion ring (key 75), and O‐ring (key 74) off the
displacer rod. Remove the O‐ring (key 77) and backup ring (key 78) from the pivot base.
Assembly
WARNING
Improper assembly of the O‐rings, anti‐extrusion ring, and backup ring could result in O‐ring extrusion and permit leakage
of process fluids. To avoid personal injury or property damage from leaking process fluid, be sure the O‐rings,
anti‐extrusion ring and backup ring are assembled in the order shown in figure 5.
1. Place the pivot body (key 72) on the displacer rod (key 64) so that it is positioned as shown in figure 5.
2. Slide the O‐ring (key 74), anti‐extrusion ring (key 75) and retaining ring (key 76) onto the displacer rod assembly
(key 64). Be sure the O‐ring, anti‐extrusion ring, and retaining ring are in the order shown in figure 5. Slide the pivot
base onto the displacer rod so that the points of the pivot body (key 72) will engage the slots in the pivot base
(key 73).
3. Install the O‐ring (key 77) and backup ring (key 78) into the groove on the pivot base (key 73). Be sure the backup
ring is on the downstream pressure side of the O‐ring as shown in figure 5.