Emerson Fisher 4194 User's Guide

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Fisher
r
4194HS Differential Pressure Indicating
Controllers
Contents
Introduction 2.................................
Scope of Manual 2.............................
Description 2.................................
Specifications 5...............................
Educational Services 5.........................
Installation, Mounting, and Connections 5..........
Pipestand Mounting 6.........................
Pressure Connections 6........................
Process Pressure Connections 7.................
Vent Connection 8............................
Supply Pressure 9.............................
Remote Set Point
(suffix letter M) Connection 9.................
Controller Operation 9..........................
Adjustments 11...............................
Remote Set Point (suffix letter M) 11..........
Manual Set Point 11........................
Proportional Band (Differential Gap) 11.......
Changing Controller Action 11...............
Switching The Auto/Manual Station
(suffix letter E) 11.......................
Prestartup Checks 12..........................
Startup 12...................................
Calibration 12................................
Process Indicator Zero‐and‐Span
Adjustment 13..........................
Remote Set Point Zero‐and‐Span
Adjustment (suffix letter M) 13............
Setting Switching Points 14.................
Direct‐Acting Controllers 14...............
Reverse‐Acting Controllers 15.............
Principle of Operation 16........................
Overall Operation 16...........................
Remote Set Point (suffix letter M) 17.............
Auto/Manual Station (suffix letter E) 17...........
Maintenance 18................................
Inspection and Maintenance 18..................
Troubleshooting 19........................
Changing Controller Action 20...............
Replacing the Differential Pressure Unit 21.....
Replacing Controller Parts 22................
 Process Pressure Scale 23..................
 Relay 23.................................
 Case and Cover 24........................
Figure 1. Fisher 4194HS Differential Pressure
Controller
W5907
W5908
NAMEPLATE
 Gauges 25...............................
 Links 25.................................
  Link Number 1 25........................
  Link Number 2 26........................
  Link Number 3 27........................
  Link Number 4 28........................
 Supply Tubing and Positive Feedback
Tubing Assemblies 28....................
Instruction Manual
D200157X012
4194HS Controllers
October 2011