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Type 2500
sudden release of the pressure.
Contact with hazardous fluid, fire, or
explosion can be caused by
puncturing, heating, or repairing a
displacer retaining process pressure
or fluid. This danger may not be
readily apparent when disassembling
the sensor assembly or removing the
displacer. Before disassembling the
sensor or removing the displacer,
observe the more specific warning
provided in the sensor instruction
manual.
Uncrating
Unless ordered separately, the controller/transmitter
is attached to the sensor when shipped. Carefully
uncrate the assembly.
CAUTION
Sensors used for interface or density
control may be so large and heavy that
the torque tube cannot fully support
their weight in air. On the 249V, a
travel stop is used to prevent damage.
Do not remove this travel stop
assembly without first removing the
displacer from the displacer rod. Refer
to the instruction manual for cageless
249 Series sensors.
Caged sensors have rods and blocks
installed at each end of the displacers
to protect the displacers in shipping.
Remove these parts before you install
the sensor to allow the displacer to
function properly.
Caged sensors come with the displacer installed in
the cage. If a tubular gauge glass is ordered with the
sensor, the gauge glass is crated separately and
must be installed at the site. A damping plate is
installed in the lower screwed or flanged connection
(see figure 3) to provide more stable operation. Be
certain that the cage equalizing connections and the
damping plate are not plugged by foreign material.
A cageless sensor comes with its displacer
separated from the sensor assembly. Displacers
6
Note
W2141−1B/IL
W0144−1/IL
DAMPING PLATE
Figure 3. Damping Plate Location
longer than 813 mm (32 inches) come in a separate
crate. Shorter displacers come in the same crate as
the sensor, but are not attached to their displacer
rods. Inspect the displacer to ensure it is not dented.
A dent may reduce the pressure rating of the
displacer. If a displacer is dented, replace it.
Controller/Transmitter Orientation
The controller/transmitter attaches to the sensor in
one of the mounting positions shown in figure 4.
Right-hand mounting is with the controller or
transmitter case to the right of the displacer when
you look at the front of the case; left-hand mounting
is with the case to the left of the displacer. The
mounting position can be changed in the field.
Changing this mounting position changes the control
action from direct to reverse, or vice versa.
All caged sensors have a rotatable head. That is, the
controller/transmitter may be positioned at any of
eight alternate positions around the cage as
indicated by the numbers 1 through 8 in figure 4. To
rotate the head, remove the head flange bolts and
nuts and position the head as desired.
Instruction Manual
Form 1013
December 2005
DISPLACER
CAGE
SCREWED
CONNECTION
FLANGED
CONNECTION
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