Instruction Manual
D200160X012
4195K Controllers
July 2018
90
capsule stack. Tighten the travel stop mounting screws to lock it into position. Decrease the input pressure to
100 percent of the capsular element range and make sure the capsule stack is not contacting the travel stop
(key 83).
D
For positive or compound pressure with a two‐capsule stack, loosen the set screw (key 87) in the travel stop nut
(key 86) between the travel stop (key 83) and the capsule stack. Slide the nut along the diaphragm capsule
extension (key 130) until it just touches the travel stop (key 83). Tighten the set screw to lock the travel stop nut
in position. Decrease the input pressure to 100 percent of the capsular element range and make sure the travel
stop nut is not contacting the travel stop (key 83).
D
For vacuum pressure, loosen the set screw (key 87) in the travel stop nut (key 86) on the end of the diaphragm
capsule extension (key 132 or 133). The nut is located on the opposite side of the travel stop (key 83) from the
capsule. Slide the nut along the diaphragm capsule extension until it just touches the travel stop (key 83).
Tighten the set screw to lock the travel stop nut in position. Decrease the vacuum to 100 percent of the capsular
element range and make sure the travel stop nut is not contacting the travel stop (key 83).
2.
For the zero stop
—perform the following as appropriate:
D
If the lower limit of the capsular element range is 0 bar (0 psig), adjust the process pressure to 0 bar (0 psig). Slide
the zero travel stop nut (key 86) along the diaphragm assembly extension until it is approximately 0.4 mm
(1/64‐inch) away from the travel stop. Tighten the set screw to lock the travel stop nut in position.
D
If the lower limit of the capsular element range is other than 0 bar (0 psig), adjust the process pressure to 5
percent below the capsular element range lower limit and slide the travel stop nut (key 86) along the diaphragm
extension until it just touches the travel stop (key 83). Tighten the set screw. Increase the input pressure to the
capsular element range lower limit and make sure the travel stop nut is not contacting the travel stop (key 83).
Aligning the Capsular Element Linkage
1. Adjust the process pressure to 75 percent of the capsular element range. The drive flexure (key 79) should be
straight and horizontal. If it is not, proceed as follows:
a. Loosen the screw on the pivot adjustment arm on the long pivot clevis assembly (key 78) and the two screws
mounting the drive flexure.
b. Adjust the length of the pivot adjustment arm so that the drive flexure is parallel to the centerline of the
capsules. Tighten the screw to set the length of the pivot adjustment arm in that position.
Note
See figure 6‐20. The adjustment arm of the long pivot clevis assembly is connected to a shaft that turns on bushings at each end of
the shaft. In the next step, position the shaft so that both bushings “float”' inside the bearings and do not rest against the end of
either bearing.
c. Before retightening the drive flexure screws, hold the long pivot clevis assembly shaft in the middle of the
bushing end play. Be sure neither bushing is resting against the inside end of either bearing.
d. Tighten the drive flexure screws to hold the pivot clevis assembly shaft in position.
2. Set the linearity adjustment screw on the short pivot clevis assembly so the two arms of the short pivot clevis
assembly are parallel. The linearity adjustment screw should be near the center of its slot.
the zero adjustment locking screw and adjust the process pointer zero adjustment screw to align the process
pointer and pointer subassembly. Tighten the zero adjustment locking screw.
4. Adjust the process pressure to 50 percent of the capsular element range.
