Emerson Fisher KC Series Instruction Manual page 65

Instruction Manual
Form 5207
April 2007
ALIGNED
W3443-1 / IL
even after full span adjustment, move the link to the
bottom hole (the hole nearest the pointer pivot). If
the process pointer has too much travel, move the
link to the top hole (the hole furthest from the pointer
pivot).
4. Move the set point Indicator, either manually or
with remote set point pressure, to the mid-scale
mark on the process scale and set the proportional
band between DIRECT and REVERSE.
5. The process pointer should be aligned with the
pointer subassembly as shown in figure 6-15. If not,
loosen the zero adjustment locking screw and adjust
the process pointer zero adjustment to align the
process pointer and pointer subassembly. Tighten
the zero adjustment locking screw.
6. Apply process pressure equal to the mid-scale
value of the process scale span. The process
pointer should indicate mid-scale ±3 percent of the
process scale span. If not, loosen the two screws in
link 1 and move the process pointer to the mid-scale
mark on the process scale. Tighten the screws.
4195KA, KB, KC, and KS Controllers
ZERO ADJUSTMENT
LOCKING SCREW
W3475-1 / IL
Figure 6-15. Process Pointer Alignment
7. 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 2
1. Remove the two screws (key 6), and lift off the
proportional band indicator cover (key 36).
2. Disconnect link 2 from the process pointer and
from the flapper assembly (key 11). Remove the
link.
3. Install the replacement link with the screw head
nearest the process pointer as shown in figure 6-13.
Connect the link to the process pointer only.
4. The process pointer should be aligned with the
pointer subassembly as shown in figure 6-15. If not,
loosen the zero adjustment locking screw and adjust
the process pointer zero adjustment to align the
process pointer and pointer subassembly. Tighten
the zero adjustment locking screw.
5. Move the set point indicator, either manually or
with the remote set point pressure, to the process
scale lower limit and set the proportional band to 5
percent REVERSE. The nozzle should not be
touching the flapper. If it is, adjust flapper leveling
MISALIGNED FINE ZERO
ADJUSTMENT
6-21