Emerson Fisher 4194 Owner's Manual

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Fisher
r
4194A, B, and C Differential Pressure
Controllers1‐1‐
Contents
1. Introduction
Scope of Manual 3.............................
Description 5.................................
Specifications 5...............................
Educational Services 5.........................
2. Installation
Controller Mounting Orientation 7...............
Pipestand Mounting 8.........................
Panel Mounting 8.............................
Wall Mounting 9..............................
Actuator Mounting 9..........................
Pressure Connections 10.......................
Process Pressure Connections 10.............
Supply Pressure Connection 10..............
Remote Set Point (suffix letter M)
Pressure Connection 10..................
Vent 11......................................
3. 4194A Proportional‐Only Controllers
Adjustments for 4194A Controllers 12............
Manual Set Point Adjustment 12.............
Remote Set Point (suffix letter M)
Adjustment 13..........................
Proportional Band Adjustment (PB ADJ) 13.....
Changing Controller Action 13...............
Switching the Auto/Manual Station
(suffix letter E) 14.......................
Prestartup Checks for 4194A Controllers 14.......
Startup for 4194A Controllers 15.................
Calibration of 4194A Controllers 16..............
General Calibration Instructions 16...........
Process Indicator Zero and Span
Calibration 16..........................
Remote Set Point (suffix letter M)
Zero and Span Calibration 17..............
Flapper Alignment 18......................
Principle of Operation for 4194A Controllers 20....
Overall Operation 20.......................
Remote Set Point (suffix letter M)
Operation 21...........................
Auto/Manual Station (suffix letter E)
Operation 21...........................
4. 4194B Proportional‐Plus‐Reset Controllers and
4194C Proportional‐Plus‐Reset‐Plus‐Rate Controllers
Adjustments for 4194B and C Controllers 22.......
Manual Set Point Adjustment 22.............
Remote Set Point (suffix letter M)
Adjustment 24..........................
Proportional Band Adjustment (PB ADJ) 24.....
Changing Controller Action 24...............
Reset Adjustment 25.......................
Rate Adjustment 25........................
Anti‐Reset Windup (suffix letter F)
Adjustment 25..........................
Switching The Auto/Manual Station
(suffix letter E) 25.......................
Prestartup Checks for 4194B and C Controllers 26..
Startup for 4194B and C Controllers 26...........
Calibration of 4194B and C Controllers 28.........
General Calibration Instructions 28...........
Process Indicator Zero and Span
Calibration
28..........................
Remote Set Point (suffix letter M)
Zero and Span Calibration 29..............
Flapper Alignment 30......................
Anti‐Reset Windup Differential Relief Valve
Calibration 32..........................
Principle of Operation for 4194B
and C Controllers 33.........................
Overall Operation 33.......................
Anti‐Reset Windup (suffix letter F)
Operation 36...........................
Remote Set Point (suffix letter M)
Operation 36...........................
Auto/Manual Station (suffix letter E)
Operation 37...........................
5. Maintenance
Inspection and Maintenance 38..................
Troubleshooting 38............................
Replacing Common Controller Parts 42...........
Replacing the Process Pressure Scale 42.......
Replacing the Relay 43.....................
Replacing the Case and Cover 43.............
Replacing the Gauges 44....................
Replacing the Pressure Control Block 44.......
Replacing the Supply Gauge, Proportional,
Reset, and Reset Valve Tubing
Assemblies 45..........................
Instruction Manual
D200154X012
4194A, B, and C Controllers
September 2014