Emerson Fisher 4194S, Instruction Manual

Page: 2 / 64

Instruction Manual
D200158X012
4194S Controllers
July 2018
2
Contents (cont'd)
Link Number 3 39 . . . . . . . . . . . . . . . . . . . . . . . . .
Link Number 4 39 . . . . . . . . . . . . . . . . . . . . . . . . .
Link Number 5 40 . . . . . . . . . . . . . . . . . . . . . . . . .
Long Pivot Assembly 40 . . . . . . . . . . . . . . . . . . . . .
Short Pivot Assembly 40 . . . . . . . . . . . . . . . . . . . .
Process Drive Flexure 41 . . . . . . . . . . . . . . . . . . . .
Process Tubing 41 . . . . . . . . . . . . . . . . . . . . . . . . .
Capsular Element Assembly 41 . . . . . . . . . . . . . . .
Maintenance Calibration 42 . . . . . . . . . . . . . . . . .
Precalibration Procedures 42 . . . . . . . . . . . . . . . .
Aligning the Drive Bracket Assembly 42 . . . . . . .
Setting the Travel Stops 42 . . . . . . . . . . . . . . . . . .
Aligning Linkage 43 . . . . . . . . . . . . . . . . . . . . . . . .
Zero and Span Adjustment 43 . . . . . . . . . . . . . . .
Linearity Adjustment 44 . . . . . . . . . . . . . . . . . . . .
Flapper Alignment 44 . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Set Point (Option M) 45 . . . . . . . . . . . . . . . . .
Replacing Parts 45 . . . . . . . . . . . . . . . . . . . . . . . . .
Pivot Assembly A 46 . . . . . . . . . . . . . . . . . . . . . . . .
Pivot Assembly B 46 . . . . . . . . . . . . . . . . . . . . . . . .
Drive Flexure 47 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tubing 47 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Set Point Capsular Element
Assembly 47 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Link A 48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Link B 48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance Calibration 48 . . . . . . . . . . . . . . . . .
Precalibration Procedure 48 . . . . . . . . . . . . . . . . .
Setting Travel Stops 49 . . . . . . . . . . . . . . . . . . . . .
Aligning Linkage 49 . . . . . . . . . . . . . . . . . . . . . . . .
Zero and Span Adjustment 49 . . . . . . . . . . . . . . .
Linearity Adjustment 50 . . . . . . . . . . . . . . . . . . . .
Auto/Manual (Option E) 50 . . . . . . . . . . . . . . . . . . . . .
Replacing the Auto/Manual Station 51 . . . . . . . .
Disassembly 51 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assembly 51 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing the Switch Body Assembly,
Lever O‐Ring, Switch Body O‐Ring,
and Tubing Assembly
51 . . . . . . . . . . . . . . . . .
Disassembly 52 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assembly 52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing the Loader Range Spring,
Diaphragm Assembly, Ball Seat,
Tubing, and Ball
53 . . . . . . . . . . . . . . . . . . . . . .
Disassembly 53 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assembly 53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing the Loader Valve Plug and
Valve Plug Spring 54 . . . . . . . . . . . . . . . . . . . . .
5. Parts Ordering 55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Kits 55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List 55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Controller Parts 55 . . . . . . . . . . . . . . . . . .
Mounting Parts 57 . . . . . . . . . . . . . . . . . . . . . . . . .
Pipestand Mounting 57 . . . . . . . . . . . . . . . . . . . .
Panel Mounting 57 . . . . . . . . . . . . . . . . . . . . . . . .
Wall Mounting 57 . . . . . . . . . . . . . . . . . . . . . . . . .
Actuator Casing Mounting 57 . . . . . . . . . . . . . . .
Actuator Yoke Mounting 57 . . . . . . . . . . . . . . . .
Tubing 57 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fittings 57 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Section 1 Introduction 1
Scope of Manual
This instruction manual provides installation, operating, calibration, maintenance, and parts ordering information for
the 4194S differential pressure indicating controllers. Portions of this manual apply only to specific configurations in
the 4194S product line. These configurations of the controller are indicated by letter suffixes in the type number that
correspond to the mode and option designated in table 1-2. Refer to table 1-2 for available 4194S configurations. The
type number of the controller is on the nameplate. Refer to figure 1-1 for the location of the nameplate.
Description
The controllers described in this manual provide a differential gap output with the options as shown in table 1-2. The
controller shows process differential pressure and set point on an easy‐to‐read process scale. The controller output is a
pneumatic signal that operates a final control element.
Do not install, operate or maintain a 4194S differential pressure indicating controller without first being fully trained
and qualified in valve, actuator and accessory installation, operation and maintenance.
To avoid personal injury or
property damage it is important to carefully read, understand, and follow all of the contents of this manual, including
all safety cautions and warnings.
If you have any questions about these instructions, contact your Emerson sales office
or Local Business Partner before proceeding.