Instruction Manual

Instruction Manual
D102803X012
249W Sensor
December 2012
5
Figure 5. Fisher 249W Sensor Cage‐Mounted on Side of Vessel
CAGE WITH TOP AND BOTTOM CONNECTIONS
CAGE WITH SIDE CONNECTIONS
W8268
W8267
Installation on Top of Vessel
Note
If a stillwell is used, install it plumb so that the displacer does not touch the wall of the stillwell. If the displacer touches the wall,
the unit will transmit an erroneous output signal.
Because the displacer hangs inside the vessel, provide a stillwell around the displacer if the fluid is in a state of
continuous agitation to avoid excessive turbulence around the displacer.
To attach the sensor body to the vessel requires a flanged connection on the vessel as shown in figure 4. For interface
or fluid level applications, install a gauge glass on the vessel.
Installation with Displacer Cage on Side of Vessel
Note
Install the cage so that it is plumb; the displacer must not touch the cage wall. If the displacer touches the cage wall, the unit will
transmit an erroneous output signal.
Figure 5 shows the 249W sensor mounted on the side of a vessel using a displacer cage. Figure 6 provides the 249W
dimensions required to fabricate a cage. Figure 7 provides overall envelope dimensions for a 249W sensor and
DLC3010/DLC3020f controller, and figure 8 provides overall envelope dimensions for a 249W and 2500 controller or
transmitter.