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Instruction Manual
D103288X012
Fisher
249VS Cageless Displacer Sensor
™
Contents
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Introduction
Scope of Manual
This instruction manual includes maintenance and parts ordering information for the cageless Fisher 249VS sensor.
Although a 249VS sensor is usually shipped with an attached controller or transmitter, this manual does not include
operation, installation, calibration, maintenance, or 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 249VS 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
proceeding.
Description
The 249VS sensor is designed to measure liquid level, interface level, or density/specific gravity inside a process vessel.
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Figure 1. Fisher 249VS Sensor with FIELDVUE
DLC3010/DLC3020f Digital Level Controller
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Emerson sales office
249VS Sensor
or Local Business Partner before
July 2018
™
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Table of Contents
Related Manuals for Emerson Fisher 249VS
Summary of Contents for Emerson Fisher 249VS
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Page 1: Table Of Contents
Introduction Scope of Manual This instruction manual includes maintenance and parts ordering information for the cageless Fisher 249VS sensor. Although a 249VS sensor is usually shipped with an attached controller or transmitter, this manual does not include operation, installation, calibration, maintenance, or parts ordering information for the controller/transmitter or for the complete unit. - Page 2 The Parts List section shows some standard 249VS displacer lengths. Table 1 contains displacer and torque tube materials. However, 249VS parts are available in a wide variety of materials of construction, part dimensions, and other specifications. Contact your Emerson sales office or Local Business Partner for assistance in selection of specific materials, dimensions, and specifications.
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Page 3: Educational Services
N05500 316 Stainless Steel, N06600, N10276 1. N05500 is not recommended for spring applications above 232_C (450_F). Contact your Emerson sales office or application engineer if temperatures exceeding this limit are required. Educational Services For information on available courses for 249VS sensors, as well as a variety of other products, contact:... -
Page 4: Mounting The Sensor On The Process Vessel
Because the displacer hangs inside the vessel, provide a stillwell around the displacer if the fluid is in a state of constant agitation to avoid excessive turbulence around the displacer. For interface or fluid level applications, install a gauge glass on the vessel. Figure 4. Fisher 249VS Sensor Side Mounted on Vessel NPS 4 RF FLANGE 249VS... -
Page 5: Maintenance
Instruction Manual 249VS Sensor D103288X012 July 2018 Figure 5. Displacer and Displacer Rod Connections COTTER SPRING DISPLACER ROD DISPLACER STEM EXTENSION LOCKING NUTS DISPLACER SPUD 3. Insert the displacer and the 249VS sensor into the process connection/vessel. 4. Place a blind flange on the back of the sensor and lightly secure (tightening nuts enough to hold wafer body and gasket in place) using four line flange bolt nuts, centering the connecting flange gasket and sensor on the vessel connecting flange. -
Page 6: Removing The Displacer And Stem
Instruction Manual 249VS Sensor July 2018 D103288X012 The displacer in this unit is a sealed container. If penetrated by process pressure or liquid, the displacer may hold pressure or hazardous liquid for an extended period. A displacer that has been penetrated by process pressure or liquid may contain: D pressure as a result of being in a pressurized vessel. - Page 7 If necessary, remove the place and choose a position where the rod will not touch the plate. 4. Follow the procedure for replacing the displacer, displacer rod assembly, cotter spring, stem end piece, and displacer spud as necessary. Figure 6. Fisher 249VS Travel Stop Plate Positions INTERMEDIATE INTERMEDIATE HIGH BJ8646‐A...
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Page 8: Replacing The Displacer, Cotter Spring, Stem End Piece, And Displacer Spud
Instruction Manual 249VS Sensor July 2018 D103288X012 Replacing the Displacer, Cotter Spring, Stem End Piece, and Displacer Spud The cotter spring (key 8), the ball on the displacer rod/driver assembly (key 14), and the stem end piece or displacer stem connector (key 18) may be either too worn for a secure connection or so clogged or corroded that the displacer does not pivot properly. -
Page 9: Replacing The Torque Tube
Instruction Manual 249VS Sensor D103288X012 July 2018 Place a screwdriver blade in the slots of the positioning plate and outer tube end as shown in figure 7. Slowly turn the positioning plate to release its lug from the torque tube arm. Then carefully turn the plate back to allow the displacer to come to rest, and slip the other lug of the plate from its slot in the outer tube end. -
Page 10: Replacing The Torque Tube Arm And Changing The Mounting Position
Instruction Manual 249VS Sensor July 2018 D103288X012 CAUTION Support the sensor assembly to avoid damage to the displacer, displacer stem, displacer rod assembly, and associated parts. 1. After following the proper procedure to remove the sensor assembly from the process vessel, move the sensor assembly to a suitable maintenance area. -
Page 11: Simulation Of Process Conditions For Calibration Of Fisher Level Controllers And Transmitters
Use only genuine Fisher replacement parts. Components that are not supplied by Emerson Automation Solutions should not, under any circumstances, be used in any Fisher instrument. Use of components not supplied by Emerson may void your warranty, might adversely affect the performance of the instrument, and could cause personal injury or property... -
Page 12: Parts Kits
(vertical or horizontal mounting) Note 3 inch x 14 inches (1600 psi) Contact your Emerson sales office or Local Business Partner for Part 3 inch x 14 inches (1500 psi) (NACE) Ordering information. 2 inch x 32 inches (1500 psi) 2 inch x 32 inches (1500 psi) (NACE) - Page 13 Instruction Manual 249VS Sensor D103288X012 July 2018 Figure 8. Fisher 249VS Sensor Construction; Flanged Connections WITH DISPLACER GE18352-A GE32002-A WITHOUT DISPLACER Description Description Stem End Piece Nameplate use with displacer stem and Drive Screw (4 req'd) standard displacer for vertical mounting...
- Page 14 Instruction Manual 249VS Sensor July 2018 D103288X012 Figure 9. Fisher 249VS Sensor Construction; Butt Weld End WITH DISPLACER GE29733-A WITHOUT DISPLACER Description Description Displacer Stem Positioning Plate Hex Nut (2 req'd) Tag, NACE (not shown) use with displacer stem and standard displacer for vertical mounting...
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Page 15: D103288X012 July
Instruction Manual 249VS Sensor D103288X012 July 2018... - Page 16 Fisher and FIELDVUE are marks owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co. Emerson Automation Solutions, Emerson, and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of their respective owners.