Link 2 - Emerson Fisher 4194HA Instruction Manual

4194HA, HB, HC Controllers
July 2018
Figure 5‐6. Process Indicator Alignment
ALIGNED
W3443‐1

Link 2

Note
Before performing the following link 2 maintenance steps, disconnect supply pressure from the controller.
1. Remove two screws (key 6) and lift off the proportional band indicator cover (key 36).
2. Note where the link is connected. Disconnect the link from process indicator assembly and from the input feedback
beam assembly (key 11). Remove the link.
3. Install the replacement link with the screw head nearest the process indicator as shown in figure 5‐5. Connect the
link to the process indicator assembly only and in the position noted in step 2.
4. The process indicator should be lined up with the indicator subassembly (as shown in figure 5‐11). If not, loosen the
zero adjustment locking screw and adjust the process indicator zero adjustment to align to the process and
indicator subassembly.
5. Adjust the set point adjustment manually or with the remote set point pressure to 100 percent of scale range. Set
the proportional band between DIRECT and REVERSE. Disconnect link 1 from the drive arm and position the process
indicator to 100 percent of the scale. Tape the indicator in place.
6. Move the set point adjustment either manually or with the remote set point pressure to 0 percent on the scale. Set
the proportional band at 5 percent REVERSE (reverse action). The nozzle should not be touching the flapper. If it is,
adjust flapper leveling screw number 1 until clearance is obtained.
48
ZERO ADJUSTMENT
LOCKING SCREW
W3475‐1
Instruction Manual
D200156X012
FINE ZERO
ADJUSTMENT
MISALIGNED