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2502 Series Controllers
RIGHT-HAND MOUNTING
AH9150−A
LEFT-HAND MOUNTING
A2613−2/IL
Figure 4. Cage Head Mounting Positions
Mounting Caged Sensor
The cage must be installed plumb so
that the displacer does not touch the
cage wall. Should the displacer touch
the cage wall, the unit will transmit an
erroneous output signal.
If the controller is not mounted on the
sensor, refer to the Installing
Controller on Sensor section. This
section also provides instructions for
adding a heat insulator to a unit.
6
Note
Note
STYLE 1: TOP
AND BOTTOM
SCREWED: S1
FLANGED: F1
STYLE 2: UPPER
AND LOWER SIDE
SCREWED: S3
FLANGED: F3
A1271−2/IL
Figure 5. Cage Connection Styles
Cage connections will normally be either 1-1/2 or
2-inch screwed or flanged. Figure 5 shows the
combinations. With flanged connections, use
standard gaskets or other flat-sheet gaskets
compatible with the process liquid. Spiral wound
gaskets without compression-controlling centering
rings cannot be used for flanged connections.
Mount the cage by running equalizing lines between
the cage connections and the vessel (figure 6). A
shutoff or hand valve with a 1-1/2 inch diameter or
larger port should be installed in each of the
equalizing lines. Also install a drain between the
cage and shutoff or hand valve whenever the bottom
cage line has a liquid-trapping low point.
On liquid or interface level applications, position the
sensor so that the line marked FLOAT CENTER on
the cage is located as close as possible to the center
of the liquid level or interface level range being
measured. Also consider installing a gauge glass
either on the vessel, or on the sensor cage (if the
cage is tapped for a gauge).
Instruction Manual
Form 1446
November 2006
STYLE 2: TOP
AND LOWER SIDE
SCREWED: S2
FLANGED: F2
STYLE 2: UPPER
SIDE AND BOTTOM
SCREWED: S4
FLANGED: F5
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