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Instruction Manual
Form 1013
December 2005
249 Series sensor, remove the torque tube arm from
the sensor or vessel and reinstall the torque tube
arm in the opposite position according to the
appropriate instruction manual. Note that the term
FLOAT is marked on the RAISE LEVEL dial and the
indicator plate, if one is used.
3. Check the desired control action. If the control
action is not correct, refer to the changing action
procedures to change it. Mount the Bourdon tube in
one of the positions shown in figure 15.
4. The arrow on the RAISE LEVEL dial under the
word FLOAT should point toward the displacer. If
not, remove the dial from the controller, turn it over,
and install it in the correct position.
5. For a controller/transmitter with an indicator
assembly, the arrow near the word FLOAT on the
indicator plate should point toward the displacer. If it
does not, remove the two screws (key 41, see detail
of indicator assembly in figure 16), turn the front
plate (key 54) to the side with the FLOAT arrow
pointing toward the displacer, and secure the plate
with the screws.
6. Install the controller/transmitter according to the
next section.
Installing Controller/Transmitter on
Sensor
If the installation is in a location that is
not readily accessible and shop
calibration is required, remove the
torque tube arm from the cage or
vessel before installing the controller
or transmitter to the sensor. Install the
controller/transmitter on the torque
tube arm in the shop; then calibrate
and return the controller/transmitter
with the torque tube arm assembly
attached for installation.
Perform step 1 only if adding a heat
insulator to a unit that does not have
one. Key numbers in this step are
shown in figure 14.
1. To install the heat insulator, secure the shaft
extension (key 37) to the torque tube assembly
rotary shaft with the shaft coupling (key 36). Tighten
both set screws (key 38), with the coupling centered
as shown in figure 14. Then mount the insulator
assembly (key 35) on the controller/transmitter case
Note
with four button head cap screws and washers (keys
40 and 53). Tighten the screws.
CAUTION
In the following step, avoid bending
the rotary shaft of the torque tube
assembly. Bending or side loading of
this shaft could cause erroneous
readings. Additionally, make sure the
ball bearing assembly (key 12, figure
16) is removed from the case (key 1,
figure 16) to provide clearance when
installing the case on the sensor.
2. Remove the bearing assembly (key 12, figure 16)
from the case (key 1, figure 16).
3. Carefully slide the controller/transmitter case
straight in. Secure the case on the torque arm or
insulator with the four cap screws (key 39).
If a heat insulator is used, do not
insulate its exterior.
4. Slide the bearing assembly (key 12, figure 16)
onto the shaft or shaft extension of the insulator, and
install the bearing assembly (key 12, figure 16) into
the case (key 1, figure 16).
5. Install the flapper base (key 30, figure 16) on the
torque tube rotary shaft, making sure the flapper is
centered over the nozzle or Bourdon tube valve.
Secure the base with the hex nut (key 40, figure 16).
For a controller/transmitter with an indicator
assembly, install the pointer assembly according to
the Replacing the Bourdon Tube section.
6. Connect the supply and output pressure tubing
and perform the calibration procedure.
Replacing the Bourdon Tube
Refer to figure 16 for key number locations.
1. Disconnect the tubing (key 10 for Type 2503 and
key 11 for Type 2500) from the Bourdon tube base.
For a controller/transmitter with indicator assembly,
loosen the side hex clamp nut (key 40) and remove
the pointer assembly (key 51) from the torque tube
rotary shaft.
2. Remove the mounting screws (key 45) and
Bourdon tube assembly (key 16).
3. Inspect the Bourdon tube. Replace it if
necessary, using a tube with a black color code for a
Type 2500
Note
27
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