Emerson Fisher 4194 Quick Start Guide

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Fisher
r
4194S Differential Pressure Controllers
Contents
1. Introduction 2...............................
Scope of Manual 2.............................
Description 2.................................
Specifications 5...............................
Educational Services 5.........................
2. Installation 7................................
Actuator Mounting 7..........................
Panel Mounting 7.............................
Wall Mounting 7..............................
Pipestand Mounting 7.........................
Pressure Connections 9........................
Process Pressure 9.............................
Supply Pressure 10............................
Vent 10......................................
Remote Set Up Point Pressure (Option M) 10.......
3. Controller Operation 11.......................
Operating Information 11......................
Adjustments 11...........................
Manual Set Point 11........................
Remote Set Point 11.......................
Proportional Band (Differential Gap) 11.......
Changing Controller Action 11...............
Auto/Manual Switching (Option E) 11.........
Prestartup Checks 12.......................
Startup 13................................
Calibration 14................................
Process Zero and Span Adjustment 14........
Remote Set Point Zero and Span
(Option M) 14..........................
Setting Switching Points 15.................
Direct‐Acting Controllers 15.................
Reverse‐Acting Controllers 17...............
Principle of Operation 17.......................
Overall Operation 17.......................
Remote Set Point 19.......................
Auto/Manual Option 19.....................
4. Maintenance 21..............................
Troubleshooting 22............................
Changing Controller Action 23..................
Replacing Controller Parts 24....................
Process Pressure Scale 24...................
Relay 25..................................
Case and Cover 26.........................
Gauges 26................................
Pressure Control Block 26...................
Figure 1‐1. Fisher 4194S Differential Pressure
Controllers
NAMEPLATE
W3613
W5663‐1
Supply Tubing and Positive
Feedback Tubing Assemblies 27...........
Proportional Band Knob, Nozzle
Assembly, and Set Point
Beam Assembly 27......................
Flapper Flexure Pivot Assembly 31............
Positive Feedback Bellows 34................
Links 36..................................
Link Number 1 36.........................
Link Number 2 38.........................
Instruction Manual
D200158X012
4194S Controllers
December 2011