Emerson Fisher 4194 Datasheet download pdf

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

n Easy Maintenance—Simple design of the controller

allows fast, easy maintenance and minimal spare

parts inventory.

n Easy 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.

n Highly 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

n Low Air Consumption—Relay and nozzle design

reduces steady state air consumption to as low as

0.09 m

/hr (3.5 scfh).

n Corrosion 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

1 2 3 4 5 6 ... 11 12

Summary of Contents

Page 1 - Controllers

www.Fisher.comFisherr 4194H Differential Pressure IndicatingControllersFisher 4194H differential pressure indicatingcontrollers show process different

Page 2 - Table of Contents

4194H Differential Pressure ControllersD200049X012Product Bulletin34.4:4194HMay 2013 10Ordering InformationWhen ordering, specify:Application1. Descr

Page 3 - Specifications (continued)

4194H Differential Pressure ControllersD200049X012Product Bulletin34.4:4194HMay 2013 11

Page 4

4194H Differential Pressure ControllersD200049X012Product Bulletin34.4:4194HMay 2013 12Emerson Process Management Marshalltown, Iowa 50158 USASorocaba

Page 5 - Principle of Operation

4194H Differential Pressure ControllersD200049X012Product Bulletin34.4:4194HMay 2013 2SpecificationsAvailable ConfigurationsSee table 1Sensing Element

Page 6 - Auto/Manual Option

4194H Differential Pressure ControllersD200049X012Product Bulletin34.4:4194HMay 2013 3Specifications (continued)Operative Ambient Temperature Limits(2

Page 7 - Construction Features

4194H Differential Pressure ControllersD200049X012Product Bulletin34.4:4194HMay 2013 4Table 2. Process Sensor (Barton 199) Ranges and Pressure Ratings

Page 8

4194H Differential Pressure ControllersD200049X012Product Bulletin34.4:4194HMay 2013 5Figure 1. Operational Schematic of Fisher 4194H Differential Pre

Page 9 - Installation

4194H Differential Pressure ControllersD200049X012Product Bulletin34.4:4194HMay 2013 6Figure 2. Schematic of Auto/Manual Option48A5230‐AA2927‐1SUPPLY

Page 10 - Ordering Information

4194H Differential Pressure ControllersD200049X012Product Bulletin34.4:4194HMay 2013 7Before the auto/manual switch is operated, the outputof the rela

Page 11 - Product Bulletin

4194H Differential Pressure ControllersD200049X012Product Bulletin34.4:4194HMay 2013 8Figure 4. Controller Construction DetailsAUTO/MANUAL OPTIONW3679

Page 12

4194H Differential Pressure ControllersD200049X012Product Bulletin34.4:4194HMay 2013 9Figure 5. Dimensions18A5903‐DA2926‐2260(10.25)330(13.00)1/2 NPT(