Emerson Fisher C1 Instruction Manual page 38

C1 Controllers and Transmitters
March 2017
5. Unscrew the bellows screws (key 53) from each end of the mounting base (key 57).
Note
The bellows screws (key 53) have an O-ring (key 77, figure 20) installed beneath the bellows screw head. Remove the O-ring and
obtain a replacement when re-assembling the bellows.
Figure 20. Bellows Screw Detail
A6281-1
6. Unscrew the spring adjustor (key 65). Unclip the lock spring (key 72, figure 17) and remove the indicator scale
(key 69) and the proportional band adjustment knob (key 73).
7. Compress the bellows (key 52) so that the end of the bellows, beam (key 39), and cantilever spring (key 8) can be
removed from the mounting base (key 57).
8. Unscrew the bellows (key 52) from the bellows/cantilever assembly.
9. Remove the cantilever spring from the spacer (key 34).
a. Remove the beam machine screws (figure 21, step m).
b. Remove the cantilever machine screws (figure 21, step l).
c. Remove the inner flexure (figure 21, step j) and install it on the new cantilever.
10. Install the new cantilever spring (key 8) and reconnect the beam (key 39) to the bellows spacer (key 34) in reverse
sequence of steps 9a and 9b and reattach the bellows to the beam/cantilever assembly.
11. Compress the bellows and install them into the mounting base (key 57). Align the cantilever spring with the gain
adjustment bar (key 63). For 0.2 to 1.0 bar (3 to 15 psig) and 0.4 to 2.0 bar (6 to 30 psig) output ranges: reverse the
spring spacer (key 245) as shown in figure 19. Install the indicator scale (key 69) and the proportional band
adjustment knob (key 73) as a unit. Snap the lock spring (key 72) onto the indicator scale.
12. Install the spring adjustor (key 65, figure 17) and washer (key 64, figure 17) on the bias spring (key 70, figure 17).
Tighten down the spring adjustor until it stops against the gain adjustment bar (key 63).
38
O-RING
(KEY 77)
Instruction Manual
D103292X012