Emerson Fisher 249 User Manual

www.Fisher.com
Fisherr 249 Cageless Displacer Sensors
Contents
Introduction 1.................................
Scope of Manual 1.............................
Description 1.................................
Type Number Description 2.....................
Educational Services 3.........................
Maintenance 3.................................
Removing the Displacer and Stem 4..............
Replacing the Displacer, Cotter Spring,
Stem End Piece, and Displacer Spud 6..........
Replacing the Displacer Rod/Driver Assembly 7....
Replacing the Torque Tube 8....................
Replacing the Torque Tube Arm and
Changing the Mounting 9....................
Simulation of Process Conditions for
Calibration of Fisher Level Controllers
and Transmitters 10............................
Parts Ordering 10...............................
Parts Kits 11...................................
Parts List 11...................................
Sensor Common Parts 11.......................
Figure 1. Fisher 249V Sensor with FIELDVUE™
DLC3010/DLC3020f Digital Level Controller
W3120‐3
Introduction
Scope of Manual
This instruction manual includes maintenance and parts ordering information for Fisher 249 cageless displacer
sensors.
Although a 249 sensor is usually shipped with attached controller or transmitter, this manual does not include
operation, installation, calibration, maintenance, and parts ordering information for the controller/transmitter or for
the complete unit. For this information, refer to the appropriate controller/ transmitter instruction manual.
Do not install, operate, or maintain a 249 sensor without 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 Process Management sales office
.
Description
249 sensors are designed to measure liquid level, interface level, or density/specific gravity inside a process vessel.
Instruction Manual
D200100X012
249 Cageless Sensors
July 2015

Emerson Fisher 249 Specifications

General

Brand	Emerson
Model	Fisher 249
Category	Accessories
Language	English

Summary

Introduction to 249 Cageless Displacer Sensors

Scope of Manual

Provides maintenance and parts ordering information for Fisher 249 sensors.

Description of 249 Sensors

Explains the function of 249 sensors in measuring liquid level, interface level, or density.

Type Number Description

Educational Services

Maintenance Procedures for 249 Sensors

Removing the Displacer and Stem

Procedure for safely removing the displacer and stem assembly from the sensor.

Replacing the Displacer, Cotter Spring, Stem End Piece, and Displacer Spud

Instructions for replacing worn or clogged components of the displacer assembly.

Replacing the Displacer Rod/Driver Assembly

Guidance on replacing the displacer rod/driver assembly due to wear or corrosion.

Replacing the Torque Tube

Steps for replacing the torque tube assembly due to deterioration or output issues.

Replacing the Torque Tube Arm and Changing the Mounting

Procedure for replacing the torque tube arm or adjusting the sensor mounting orientation.

Simulation of Process Conditions for Calibration

Parts Ordering and Identification

Parts Kits

Lists available sensor part kits, including components for the 249BP model.

Parts List

Detailed list of sensor common parts, including key numbers, descriptions, and materials.