Instruction Manual
D103288X012
249VS Sensor
July 2018
5
Figure 5. Displacer and Displacer Rod Connections
LOCKING NUTS
DISPLACER SPUD
DISPLACER STEM
EXTENSION
DISPLACER ROD
COTTER SPRING
3. Insert the displacer and the 249VS sensor into the process connection/vessel.
4. Place a blind flange on the back of the sensor and lightly secure (tightening nuts enough to hold wafer body and
gasket in place) using four line flange bolt nuts, centering the connecting flange gasket and sensor on the vessel
connecting flange.
5. Install the remaining line flange bolts and nuts.
6. Tighten all nuts in a crisscross fashion.
Maintenance
Sensor parts are subject to normal wear and must be inspected regularly and replaced as necessary. The frequency of
inspection and replacement depends upon the severity of service conditions.
WARNING
Always wear protective clothing, gloves, and eyewear when performing any maintenance operations to avoid personal
injury.
Avoid personal injury or property damage resulting from the sudden release of pressure. Before performing any
maintenance procedure:
D
Relieve any process pressure in the process vessel where the 249VS sensor is installed.
D
Drain the process liquid from the process vessel.
D
Shut off any electrical or pneumatic input to the controller or transmitter attached to the 249VS sensor and vent any
pneumatic supply pressure.
D
Use caution when loosening flange bolting.
D
Remove the controller or transmitter from the torque tube arm (key 1).
Before performing any maintenance procedure requiring the handling of the displacer, inspect the displacer (key 9) to
make sure process pressure or liquids have not penetrated the displacer.
