Emerson 249B Datasheet download pdf

www.Fisher.com

Fisherr 2500‐249 Pneumatic Controllers and

Transmitters

Typical caged and cageless sensor/instrument

configurations are shown below and in figure 1. Caged

sensors (figure 2) provide more stable operation than

do cageless sensors (figure 3) for vessels with internal

obstructions or considerable internal turbulence.

Cageless sensors are generally used on specific gravity

and interface control applications requiring large

displacers that are more easily accommodated by

flange connections up to NPS 8. The availability of

many different displacer stem lengths permits

lowering the displacer down to the most

advantageous depth in the vessel.

Fisher pneumatic controllers and transmitters are used

wherever rugged, dependable, and simply constructed

displacer‐style pneumatic instrumentation is required

in liquid level, interface level, or density service. The

ruggedness of these products is demonstrated by their

use in many kinds of demanding applications,

including those in the power, chemical process, oil and

gas production, and petrochemical industries.

STANDARD CAGED SENSORS

MOUNT ON VESSEL SIDE WITH

DISPLACER INSIDE CAGE

W8334

W9354‐1

FISHER L3 PNEUMATIC LEVEL CONTROLLER

(2500 CONTROLLER IN COMBINATION WITH A

249W SENSOR) CAN MOUNT ON VESSEL TOP OR

BE INSTALLED IN A CUSTOMER‐SUPPLIED CAGE

W8679

CAGELESS SENSORS CAN MOUNT

ON VESSEL SIDE OR TOP WITH

DISPLACER INSIDE VESSEL

2500-249 Controllers and Transmitters

D200037X012

Product Bulletin

34.2:2500

July 2012

1 2 3 4 5 6 ... 15 16

Summary of Contents

Page 1 - Transmitters

www.Fisher.comFisherr 2500‐249 Pneumatic Controllers andTransmittersTypical caged and cageless sensor/instrumentconfigurations are shown below and in

Page 2 - Specifications

2500-249 Controllers and TransmittersD200037X012Product Bulletin34.2:2500July 2012 10Figure 5. Schematic of Direct‐Acting Fisher 2500‐249 Proportional

Page 3 - Table of Contents

2500-249 Controllers and TransmittersD200037X012Product Bulletin34.2:2500July 2012 11Figure 6. Schematic of Direct‐Acting Proportional‐Plus‐Reset Cont

Page 4

2500-249 Controllers and TransmittersD200037X012Product Bulletin34.2:2500July 2012 12Anti‐Reset Windup2502F and 2502FR controllers additionally havean

Page 5 - Features

2500-249 Controllers and TransmittersD200037X012Product Bulletin34.2:2500July 2012 13Figure 7. Schematic of Reverse‐Acting Fisher 2503R ControllerB044

Page 6

2500-249 Controllers and TransmittersD200037X012Product Bulletin34.2:2500July 2012 14Figure 9. Torque Tube Arm Mounting PositionsRIGHT-HAND LEFT-HANDS

Page 7

2500-249 Controllers and TransmittersD200037X012Product Bulletin34.2:2500July 2012 15Ordering InformationApplicationWhen ordering, specify:n Control (

Page 8

2500-249 Controllers and TransmittersD200037X012Product Bulletin34.2:2500July 2012 16Emerson Process Management Marshalltown, Iowa 50158 USASorocaba,

Page 9

2500-249 Controllers and TransmittersD200037X012Product Bulletin34.2:2500July 2012 2SpecificationsAvailable ConfigurationsSee tables 1, 5, and 6Input

Page 10 - Principle of Operation

2500-249 Controllers and TransmittersD200037X012Product Bulletin34.2:2500July 2012 3Specifications (Continued)Standard Tubing Connections1/4 NPT inter

Page 11 - Transmitter

2500-249 Controllers and TransmittersD200037X012Product Bulletin34.2:2500July 2012 4Table 1. Additional Specifications for Selected Fisher 2500 Contro

Page 12 - Installation

2500-249 Controllers and TransmittersD200037X012Product Bulletin34.2:2500July 2012 5Table 4. Supply Pressure DataOUTPUT SIGNALSTANDARD SUPPLY AND OUTP

Page 13 - Product Bulletin

2500-249 Controllers and TransmittersD200037X012Product Bulletin34.2:2500July 2012 6Figure 1. Typical Fisher 2500 Controller Constructions with Right‐

Page 14

2500-249 Controllers and TransmittersD200037X012Product Bulletin34.2:2500July 2012 7W0144-1DAMPING ORIFICE(REMOVABLE IF CLOGGING WILL OCCUR)W1800‐1W21

Page 15 - Ordering Information

2500-249 Controllers and TransmittersD200037X012Product Bulletin34.2:2500July 2012 8Table 5. Caged Displacer Sensors(1)SENSOREQUALIZING CONNECTIONPRES

Page 16

2500-249 Controllers and TransmittersD200037X012Product Bulletin34.2:2500July 2012 9Table 7. Construction MaterialsPart Sensor MaterialIn contactwith