Maintenance; Removing The Controller From The Sensor; Installing Sensor Repair Kit (Rl2Sensx012) - Fisher L2e Instruction Manual

L2e Controller
March 2017

Maintenance

Parts are subject to normal wear and must be inspected periodically and replaced as necessary. The frequency of parts
inspection and replacement depends upon the severity of service conditions.
When inspection or repairs are required, disassemble only those parts necessary to accomplish the task.
WARNING
Always wear protective clothing, gloves, and eyewear when performing any maintenance operations to avoid personal
injury. To avoid personal injury or property damage caused by the release of pressure or process fluid, observe the
following before starting maintenance:
D Provide some temporary means of control for the process before taking the controller out of service.
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

Refer to figure 7 for key number locations unless otherwise indicated.
1. Disconnect power from any electrical source.
2. Slide the hook end of the zero spring (key 7) over and off the controller end of the displacer rod (key 64).
3. Remove the four controller mounting screws (key 24), and pull the controller straight away from the sensor.

Installing Sensor Repair Kit (RL2SENSX012)

Refer to figure 9 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 vessel.
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), anti­extrusion ring (key 75), and O­ring (key 74) off the
displacer rod. Remove the O­ring (key 77) and backup ring (key 78) from the pivot base.
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Instruction Manual
D103531X012