Emerson Fisher KC Series - Page 2

4195KA, KB, KC, and KS Controllers
Instruction Manual
Form 5207
April 2007
1-2
Contents (continued)
5. 4195KS Series Differential Gap Controllers
Operating Information 5-1. . . . . . . . . . . . . . . . . . .
Adjustments for 4195KS Series Differential
Gap Controllers 5-1. . . . . . . . . . . . . . . . . . . . . .
Manual Set Point 5-1. . . . . . . . . . . . . . . . . . . . . .
Remote Set Point (Option M) 5-1. . . . . . . . . . . .
Proportional Band (Differential Gap) 5-1. . . . . .
Changing Controller Action 5-1. . . . . . . . . . . . . .
Auto/Manual Switching (Option E) 5-1. . . . . . .
Prestartup Checks 5-2. . . . . . . . . . . . . . . . . . . . . .
Startup 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Calibration 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Process Zero and Span Adjustment 5-3. . . . . .
Remote Set Point Zero and Span
(Option M) 5-4. . . . . . . . . . . . . . . . . . . . . . . . .
Setting Switching Points 5-5. . . . . . . . . . . . . . . .
Direct-Acting Controllers 5-5. . . . . . . . . . . . . . .
Reverse-Acting Controllers 5-5. . . . . . . . . . . . .
Principle of Operation 5-7. . . . . . . . . . . . . . . . . . .
Overall Operation 5-7. . . . . . . . . . . . . . . . . . . . . .
Remote Set Point (Option M) 5-8. . . . . . . . . . . .
Auto/Manual Option 5-8. . . . . . . . . . . . . . . . . . . .
6. Maintenance
Inspection and Maintenance 6-1. . . . . . . . . . . . . .
Troubleshooting 6-1. . . . . . . . . . . . . . . . . . . . . . . .
Replacing Common Controller Parts 6-1. . . . . . .
Replacing the Process Pressure Scale 6-5. . .
Replacing the Relay 6-6. . . . . . . . . . . . . . . . . . . .
Replacing the Case and Cover 6-6. . . . . . . . . .
Replacing the Gauges 6-6. . . . . . . . . . . . . . . . . .
Replacing the Supply Gauge, Proportional,
Reset, Reset Valve and Positive Tubing
Feedback Assemblies 6-7. . . . . . . . . . . . . . .
Replacing the Proportional Band Adjustment
Knob, Nozzle Assembly, and Set Point
Beam Assembly 6-7. . . . . . . . . . . . . . . . . . . . .
Replacing the Flapper Assembly and
Flapper Flexure Pivot Assembly 6-11. . . . . .
Replacing the Proportional or Reset
Bellows 6-15. . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing the Reset Restriction Valve
(4195KB Series) 6-17. . . . . . . . . . . . . . . . . . .
Replacing the Rate/Reset Valve Assembly
(4195KC Series) 6-18. . . . . . . . . . . . . . . . . . .
Replacing the Anti-Reset Windup
(suffix letter F) Differential Relief Valve 6-19
Replacing the Anti-Reset Windup
(suffix letter F) Relief Valve Tubing
Assembly 6-19. . . . . . . . . . . . . . . . . . . . . . . . .
Bourdon Tube Controller Maintenance
and Calibration 6-20. . . . . . . . . . . . . . . . . . . . . .
Replacing the Bourdon Tube 6-20. . . . . . . . . . .
Replacing Bourdon Tube Controller Links 6-20
Replacing Link 1 6-20. . . . . . . . . . . . . . . . . . . .
Replacing Link 2 6-21. . . . . . . . . . . . . . . . . . . .
Replacing Link 3 6-22. . . . . . . . . . . . . . . . . . . .
Replacing Link 4 6-22. . . . . . . . . . . . . . . . . . . .
Bourdon Tube Travel Stop Installation
and Adjustment 6-23. . . . . . . . . . . . . . . . . . . .
Bourdon Tube Controller Calibration:
Zero and Span Adjustment 6-24. . . . . . . . . .
Capsular Element Controller Maintenance
and Calibration 6-27. . . . . . . . . . . . . . . . . . . . . .
Replacing the Capsular Element
Assembly 6-27. . . . . . . . . . . . . . . . . . . . . . .
Replacing Capsular Element Parts 6-27. . . .
Replacing the Long Pivot Assembly 6-27. . .
Replacing the Short Pivot Assembly 6-28. . .
Replacing the Process Drive Flexure 6-28. .
Replacing the Process Tubing 6-29. . . . . . . .
Replacing Capsular Element
Controller Links 6-29. . . . . . . . . . . . . . . . . .
Replacing Link 1 6-30. . . . . . . . . . . . . . . . . . . .
Replacing Link 2 6-30. . . . . . . . . . . . . . . . . . . .
Replacing Link 3 6-30. . . . . . . . . . . . . . . . . . . .
Replacing Link 4 6-31. . . . . . . . . . . . . . . . . . . .
Replacing Link 5 6-31. . . . . . . . . . . . . . . . . . . .
Capsular Element Controller
Maintenance Calibration 6-32. . . . . . . . . . . . .
Precalibration Procedure 6-32. . . . . . . . . . . .
Aligning the Drive Bracket Assembly 6-32. .
Setting the Travel Stops 6-32. . . . . . . . . . . . .
Aligning the Linkage 6-33. . . . . . . . . . . . . . . .
Capsular Element Controller
Zero and Span Adjustment 6-34. . . . . . . . . .
Remote Set Point (suffix letter M)
Maintenance 6-36. . . . . . . . . . . . . . . . . . . . . . . .
Replacing the Remote Set Point
Assembly 6-36. . . . . . . . . . . . . . . . . . . . . . . . .
Replacing Remote Set Point
Assembly Parts 6-36. . . . . . . . . . . . . . . . . .
Replacing Pivot Assembly A (key 114) 6-36.
Replacing Pivot Assembly B (key 115) 6-37.
Replacing the Drive Flexure 6-37. . . . . . . . . .
Replacing the Remote Set Point Tubing 6-38
Replacing Link A 6-38. . . . . . . . . . . . . . . . . . .
Replacing Link B 6-38. . . . . . . . . . . . . . . . . . .
Remote Set Point (suffix letter M)
Maintenance Calibration 6-38. . . . . . . . . . . . . .
Precalibration Procedure 6-38. . . . . . . . . . . . . .
Aligning the Flexures 6-39. . . . . . . . . . . . . . . . . .
Setting the Travel Stops 6-39. . . . . . . . . . . . . . .
Aligning the Linkage 6-39. . . . . . . . . . . . . . . . . .
Remote Set Point Zero and Span
Adjustment 6-40. . . . . . . . . . . . . . . . . . . . . . . .
Remote Set Point Linearity Adjustment 6-41. .
Auto/Manual Station (suffix letter E)
Maintenance 6-41. . . . . . . . . . . . . . . . . . . . . . . .
Replacing the Auto/Manual Station 6-41. . . . . .