Emerson Fisher 4194 Handbook

(0 Votes) | (0)
Page / 12
www.Fisher.com
Fisherr 4194H Differential Pressure Indicating
Controllers
Fisher 4194H differential pressure indicating
controllers show process differential pressure and set
point on an easy‐to‐read process scale. These high
static pressure controllers sense two different
pressures and compare the difference between these
pressures with an operator‐adjusted set point. A
pneumatic signal is then delivered to a control
element to change the process differential pressure
toward the set point. 4194H controllers use a
differential pressure unit such as the Barton™ 199 for
differential pressure up to 5.2 bar (75 psi). The product
line includes proportional‐only,
proportional‐plus‐reset, and differential gap
controllers.
The controllers are also available with anti‐reset
windup, internal auto/manual station, and remote set
point adjustability (see table 1). 4194H controllers are
used throughout industries where process monitoring
and accurate measurement of differential pressure are
required.
Features
nEasy Maintenance—Simple design of the controller
allows fast, easy maintenance and minimal spare
parts inventory.
nEasy Adjustment—Adjustments of set point and zero
and span of the process pointer, and switching
between direct and reverse action are accomplished
quickly and without special tools. Also, the set point
and proportional band can be adjusted with no
interaction between the two adjustments.
nHighly Visible Display—Two red pointers on a
114 mm (4.50 inch) long white‐on‐black scale show
differential pressure and deviation from set point at
a glance. Two other gauges monitor supply and
output pressures.
CONTROLLER WITH
DIFFERENTIAL PRESSURE UNIT
INTERIOR OF CONTROLLER
SUPPLY
PRESSURE
GAUGE
OUTPUT
PRESSURE
GAUGE
SET POINT
ADJUSTMENT
PROCESS DIFFERENTIAL
PRESSURE INDICATOR
W5826‐1
W5825
nLow Air Consumption—Relay and nozzle design
reduces steady state air consumption to as low as
0.09 m
3
/hr (3.5 scfh).
nCorrosion Resistant—Thermoplastic housing
withstands a broad range of corrosive
environments. Internal constructions are available
to resist a corrosive supply pressure media.
4194H Differential Pressure Controllers
D200049X012
Product Bulletin
34.4:4194H
May 2013