Emerson Fisher KC Series Instruction Manual page 66

4195KA, KB, KC, and KS Controllers
screw 1 (the screw nearest the nozzle) until
clearance is obtained.
6. Disconnect link 1 from the Bourdon tube and
manually position the process pointer to the process
scale upper limit. Tape the pointer in this position.
7. Adjust the length of link 2 (by turning the
adjusting screw clockwise to increase the length or
counterclockwise to decrease the length) so that the
pin on the end of the link is approximately one-half
of its diameter short of aligning with the hole in the
flapper assembly as shown in figure 6-11. This
adjustment provides the proper tension on the link to
eliminate lost motion.
8. Connect link 2 to the flapper assembly.
9. Remove the tape from the process pointer and
reconnect link 1 to the Bourdon tube.
10. Perform the controller calibration procedures
and, if necessary, the appropriate remote set point
calibration procedure in Section 3, 4, or 5.
Replacing Bourdon Tube Controller Link 3
1. Remove the two screws (key 6), and lift off the
proportional band indicator cover (key 36).
2. Disconnect link 3 from the set point indicator and
the set point beam assembly (key 23).
3. Adjust the replacement link to the same length as
the link removed.
4. Install the replacement link with the screw head
toward the set point beam assembly as shown in
figure 6-13.
5. Check that the set point beam bias spring (key
28) is correctly located in the frame bore and the
spring seat on the set point beam assembly as
shown in figure 6-3.
6. Move the set point indicator to the mid-scale
mark on the process scale.
7. Apply process pressure to position the process
pointer at the mid-scale mark on the process scale.
8. Adjust the proportional band to 5 percent
DIRECT. Turn flapper leveling screw 3 (the screw
nearest the nozzle) until the nozzle just touches the
flapper.
9. Adjust the proportional band to 5 percent
REVERSE. Turn flapper leveling screw 1 (the screw
nearest the nozzle) until the nozzle just touches the
flapper.
10. Flapper leveling screws 1 and 3 should protrude
the same distance from the clinch nuts. A clinch nut
is shown in figure 6-16.
6-22
CLINCH
NUT
W4191-1 / IL
Figure 6-16. Flapper leveling Screw and Clinch Nut
11. If leveling screw 1 protrudes further than
leveling screw 3, turn the link 3 adjusting screw
counterclockwise. If leveling screw 3 protrudes
further than leveling screw 1, turn the link 3 adjusting
screw clockwise.
12. Repeat steps 8 through 11 until leveling screws
1 and 3 protrude an equal distance from the clinch
nuts.
13. Perform the controller calibration procedures
and, if necessary, the appropriate remote set point
calibration procedure in Section 3, 4, or 5.
Replacing Bourdon Tube Controller Link 4
1. Remove the two screws (key 6), and lift off the
proportional band indicator cover (key 36).
2. Disconnect link 4 from the bellows bracket (key
31) and the flapper assembly (key 11).
3. Connect the replacement link to the flapper
assembly so that the two adjusting screws on the
link are nearest to the bellows bracket (key 31) and
so that the screw heads are facing the bottom of the
controller as shown in figure 6-17.
4. For controllers with reset (4195KB Series) or
reset and rate adjustments (4195KC Series), turn
the reset adjustment to the CLOSED (4195KB) or
OFF (4195KC) position. Turn the rate adjustment
(4195KC Series) to the OFF position.
The controller output must be 0 bar (0 psig). To be
sure the controller output is at 0 bar (0 psig), remove
supply pressure, set the reset adjustment to 0.01
minutes per repeat and wait 30 seconds; then, turn
the reset adjustment to the CLOSED (4195KB) or
OFF (4195KC) position.
Instruction Manual
Form 5207
April 2007
FLAPPER LEVELING
SCREW