Prestartup Checks - Emerson Fisher 4194S Instruction Manual

4194S Controllers
July 2018
When the automatic/manual switch is in AUTOMATIC, adjusting the loader knob has no effect on the controller
output. When the automatic/manual switch is in MANUAL, changing the set point adjustment has no effect on the
controller output.
Note
Switching the controller between automatic and manual mode without balancing can disturb the process and cause controller
cycling.

Prestartup Checks

When performing the checks, open loop conditions must exist. Refer to figure 3-1 for location of adjustments.
Note
If the controller has the auto/manual option (option E), be sure the controller is in the automatic mode prior to performing
prestartup checks.
Figure 3-1. Location of Controller Parts and Adjustments
GUIDE
FLEXURE
DRIVE
FLEXURE
LONG
PIVOT
LINKS
SHORT
PIVOT
38A1731‐B
SENSING ELEMENT
C0541
12
HIGH PRESSURE
CAPSULAR UNIT
LOW PRESSURE
CAPSULAR UNIT
INDICATING
ASSEMBLY
LINK 1
LINK 2
LINEARITY
ADJUSTMENT
LOW
PRESSURE
INPUT
38A3819‐A
SUPPLY
GAUGE
HIGH PRESSURE
INPUT
FRONT VIEW
Instruction Manual
D200158X012
SET POINT
INDICATOR
PROCESS
INDICATOR
PROPORTIONAL
BAND
INDICATOR
COVER
PROPORTIONAL
BAND INDICATOR
DRIVE LINKAGE
CONNECTING
LINK
POINTER ZERO
ADJUSTMENT
OUTPUT
PRESSURE GAUGE
PROCESS POINTER
SPAN ADJUSTMENT