4195KA, KB, KC, and KS Controllers
Instruction Manual
Form 5207
April 2007
4-8
the controller has a capsular input element, note the
hole where link number 1 is connected to the input
element, then disconnect link 1. This method should
only be used if pressure is not available to pressure
the input element to the mid-scale value.
Note
Because of the high controller gain,
the controller output will not remain
stable in steps 9 through 13. The
controller output gauge is adequate to
check the output pressure during this
procedure.
9. Set the proportional band between DIRECT and
REVERSE.
10. The controller output should be relatively stable
at any value within the output range. If not, adjust
flapper leveling screw 2 (the screw nearest the
nozzle) until the output is relatively stable.
11. Set the proportional band to 30 percent
DIRECT. The controller output should be relatively
stable at any value within the output range. If not,
adjust flapper leveling screw 3 (the screw nearest
the nozzle) until the output is relatively stable.
12. Set the proportional band to 30 percent
REVERSE. The controller output should be relatively
stable at any value within the output range. If not,
adjust flapper leveling screw 1 (the screw nearest
the nozzle) until the output is relatively stable.
13. Repeat steps 9 through 12 until the controller
output remains relatively stable without further
flapper leveling screw adjustment.
Note
Steps 14 through 20 check the flapper
alignment.
14. Set the proportional band to 30 percent
DIRECT.
W4039 / IL
W4038 / IL
RIGHT-HAND EDGE
LEFT-HAND EDGE
Figure 4-4. Alignment of the Process Pointer with the
Set Point Indicator
15. Apply process pressure to the input element or,
if link 1 was disconnected, remove the tape from the
process pointer and move the pointer until it aligns
with the right-hand edge of the set point indicator as
shown in figure 4-4.
The controller output should be within 0.14 bar (2
psig) of the supply pressure.
16. Apply process pressure to the input element or,
if disconnected, move the process pointer until it
aligns with the left-hand edge of the set point
indicator as shown in figure 4-4.
The controller output pressure should go to 0 bar (0
psig).
17. Set the proportional band to 30 percent
REVERSE.
18. Apply process pressure to the input element or,
if disconnected, move the process pointer until it
aligns with the right-hand edge of the set point
indicator as shown in figure 4-4. The controller
output should be 0 bar (0 psig).
19. Apply process pressure to the input element or,
if disconnected, move the process pointer until it
aligns with the left-hand edge of the set point
indicator as shown in figure 4-4. The controller
output should be within 0.14 bar (2 psig) of the
supply pressure.
20. If the controller does not perform as indicated in
steps 14 through 19, the flapper is not correctly
To Next Page
Loading...
