Emerson Fisher 4194 Buyer's Guide

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Fisherr 4194HA, HB, and HC Differential
Pressure Indicating Controllers
Contents
1. Introduction
Scope of Manual 3.............................
Description 4.................................
Specifications 4...............................
Educational Services 4.........................
2. Installation, Mounting, and Connections
Controller Mounting Orientation 8...............
Pipestand Mounting 8.........................
Pressure Connections 8........................
Process Pressure Connections 10................
Supply Pressure 10............................
Vent Connection 11...........................
Remote Set Point (suffix letter M) Connection 11...
External Feedback Connection
(4194HB Controllers only) 11.................
3. 4194HA Proportional‐Only Controllers
Adjustments for 4194HA Controllers 12...........
Manual Set Point Adjustment 13.............
Remote Set Point (suffix letter M)
Adjustment 14..........................
Proportional Band Adjustment (PB ADJ) 14.....
Changing Controller Action 15...............
Switching The Auto/Manual Station
 (suffix letter E) 15.........................
Prestartup Checks for 4194HA Controllers 15......
Startup for 4194HA Controllers 16...............
Calibration for 4194HA Controllers 17............
General Calibration Instructions 17...........
Process Indicator Zero‐and‐Span
Calibration 17..........................
Remote Set Point (suffix letter M)
Zero‐and‐Span Adjustment 18.............
Flapper Alignment 19......................
Principle of Operation for 4194HA Controllers 20...
Overall Operation 20.......................
Remote Set Point Option
(suffix letter M) 21.......................
Auto/Manual Station Option
(suffix letter E) 21.......................
4. 4194HB Proportional‐Plus‐Reset
Controllers and 4194HC
Proportional‐Plus‐Reset‐Plus‐Rate
Controllers
Adjustments for 4194HB and HC Controllers 22....
Manual Set Point Adjustment 22.............
Remote Set Point (suffix letter M)
Adjustment 22..........................
Proportional Band Adjustment (PB ADJ) 22.....
Changing Controller Action 22...............
Reset (suffix letter B) Adjustment 23..........
Rate (suffix letter C) Adjustment 23...........
Anti‐Reset Windup (suffix letter F)
Adjustment 23..........................
Switching the Auto/Manual Station
(suffix letter E) 23.......................
Prestartup Checks for 4194HB and
HC Controllers 23...........................
Startup for 4194HB and HC Controllers 24.........
Calibration for 4194HB and HC Controllers 25......
General Calibration Instructions 25...........
Process Indicator Zero‐and‐Span
Calibration 26..........................
Remote Set Point (suffix letter M)
Zero‐and‐Span Calibration 27.............
Flapper Alignment 27......................
Anti‐Reset Windup Valve
(suffix letter F) Calibration 30..............
Principle of Operation for 4194HB and
HC Controllers 31...........................
Overall Operation 31.......................
Anti‐Reset Windup Option (suffix letter F) 34...
Remote Set Point Option (suffix letter M) 34...
Auto/Manual Station Option (suffix letter E) 34.
External Feedback Option 35................
5. Maintenance
Inspection and Maintenance 37..................
Troubleshooting 37............................
Changing Controller Action 41..................
Replacing the Differential Pressure Unit 42........
Instruction Manual
D200156X012
4194HA, HB, HC Controllers
September 2014