Emerson Fisher KC Series Instruction Manual page 54

4195KA, KB, KC, and KS Controllers
FLAPPER
W3449 / IL
Figure 6-5. Nozzle-Flapper Positioning
15. Turn the proportional band adjustment knob to 5
percent DIRECT. Refer to figure 6-6 to locate the
locking nut on the adjustable set point pivot
assembly. Loosen the locking nut and back out the
set screw slightly so that the set point beam
assembly falls under its own weight when pivoted
upward. Also, maintain a minimum side play
between the adjustable set point pivot assembly and
the nozzle tubing assembly. Tighten the locking nut.
16. At the frame manifold (key 135), tighten the nut
that secures the tubing from the relay nozzle tubing
assembly (key 18). Apply full supply pressure with
the nozzle capped and check for leaks. Remove
supply pressure.
17. Install the set point beam bias spring (key 28)
into the frame bore and onto the spring seat on the
set point beam assembly.
18. Attach link 3 to the set point beam shoe as
shown in figure 6-3.
19. For controllers with reset or rate adjustment
(4195KB or 4195KC Series), turn the reset
adjustment to the CLOSED (4195KB) or OFF
(4195KC) position. Set the rate adjustment to the
OFF position.
6-10
NOZZLE
LOCKING
NUT
SCREW AND WASHER
(KEYS 19 AND 20)
NOTES:
1
SCREW INSERTED INTO THE ADJUSTABLE SET POINT PIVOT ASSEMBLY.
2
SCREW INSERTED INTO THE RELAY NOZZLE TUBING ASSEMBLY.
W4195 / IL
Figure 6-6. Adjustable Set Point Pivot Assembly
Locking Nut Location
The controller output must be 0 bar (0 psig). To be
sure the controller output is 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 position
(4195KB) or to the OFF position (4195KC).
20. Apply the correct supply pressure (refer to table
1-6) to the controller and provide an accurate means
of measuring the controller output pressure.
21. Perform the appropriate process indicator zero
and span calibration procedure and, if necessary,
the remote set point zero and span calibration
procedure in Section 3, 4, or 5. When calibration is
complete, continue with step 22 below.
The following procedure (steps 22
through 28) matches the process
pointer motion to the set point
indicator motion so the controller will
control at set point at all positions on
the process scale.
22. Set the proportional band to 40 percent in
REVERSE or DIRECT depending on the desired
controller action.
23. Adjust the set point to the lower limit on the
process scale.
Instruction Manual
Form 5207
April 2007
ADJUSTABLE SET POINT
PIVOT ASSEMBLY
SCREW AND WASHER
2 (KEYS 19 AND 20) 1
Note