Emerson 249B Instruction Manual
Contents
1. DIO LLE pe fl lt v 2 ox C9 9 9 CJ G9 9 9 ov P EARNS LASS D 2 29 SECTION LY 249 Caged Sensors Instruction Manual August 2014 D200099X012 Neither Emerson Emerson Process Management nor any of their affiliated entities assumes responsibility for the selection use or maintenance of any product Responsibility for proper selection use and maintenance of any product remains solely with the purchaser and end user Fisher is a mark owned by one of the companies in the Emerson Process Management business unit of Emerson Electric Co Emerson Process Management Emerson and the Emerson logo are trademarks and service marks of Emerson Electric Co All other marks are the property of their respective owners The contents of this publication are presented for informational purposes only and while every effort has been made to ensure their accuracy they are not to be construed as warranties or guarantees express or implied regarding the products or services described herein or their use or applicability All sales are governed by our terms and conditions which are available upon request We reserve the right to modify or improve the designs or specifications of such products at any time without notice Emerson Process Management Marshalltown lowa 50158 USA Sorocaba 1802. e pressure as aresult of being in a pressurized vessel e liquid that becomes pressurized due to a change in temperature e liquid that is flammable hazardous or corrosive Sudden release of pressure contact with hazardous liquid fire or explosion which might result in personal injury or property damage can occur if a displacer that is retaining pressure or process liquid is punctured subjected to heat or repaired Handle the displacer with care Consider the characteristics of the specific process liquid in use Check with your process or safety engineer for any additional measures that must be taken to protect against process media Note Except for gaskets keys 13 and 14 trouble symptoms peculiar to specific parts are discussed in the following sections Each section is specific to these parts Regardless of location gasket failure is indicated by leakage in the gasket area Every time a gasket is removed replace it with a new one upon reassembly The procedures below apply to all sensor types except where indicated Key numbers used are shown in the following illustrations 249 figure 8 249B figure 9 249C figure 10 249K figure 1 1 249L figure 12 Cleaning the Cage Process residue buildup in the bottom of the cage key 1 or at the connections may restrict flow in and out of the cage or interfere with displacer motion Remove the cage to clean out process residue buildup 1 Before starting any maintenance pr
3. depends upon the severity of service conditions A WARNING Always wear protective clothing gloves and eyewear when performing any installation operations to avoid personal injury Avoid personal injury or property damage resulting from the sudden release of pressure Before performing any maintenance procedure e Relieve any process pressure in the vessel where the 249 sensor is installed e Drain the process liquid from the vessel e Shut off any electrical or pneumatic input to the controller or transmitter attached to the 249 sensor and vent any pneumatic supply pressure Use caution when loosening flange bolting key 22 or pipe plugs key 17 26 or 27 e Remove the controller or transmitter from the torque tube arm key 3 Before continuing with any maintenance procedure be sure the cage key 1 is also free of process pressure and or liquid Use caution when loosening flange bolting key 22 or pipe plugs key 17 26 or 27 Before performing any maintenance procedure requiring the handling of the displacer inspect the displacer key 10 to make sure process pressure or liquids have not penetrated the displacer Instruction Manual 249 Caged Sensors D200099X012 August 2014 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
4. in a wide variety of materials of construction part dimensions or other specifications Listed here are standard or typical materials dimensions or specifications Contact your Emerson Process Management sales office for assistance in selection of specific materials dimensions or specifications 249 Caged Sensors August 2014 9 gt SECTION A A Key Description 24 Displacer Stem 531600 For 249 For 249B For 249C For 249K styles F3 F4 only For 249L styles F1 F2 only For 249L styles F3 F4 only 25 HexNut B8M 2 req d Notes For key 26 see figure 5 Two styles of vessel cage connections are available screwed S and flanged F Four connection configurations are available e 1 top and bottom of cage e 2 top and lower side of cage e 3 side of cage only e 4 upper side and bottom of cage Styles 1 2 3 4 refer to either screwed or flanged Styles 51 52 53 54 refer to screwed connections Styles F1 F2 F3 F4 refer to flanged connections 17 249 Caged Sensors August 2014 Key Description Part Number 26 PipePlug For 249 malleable cast iron 1 1 2 NPT styles S2 3 S4 2 req d 2 NPT style 52 53 amp S4 For 249B steel styles 3 S4 For 249C S31600 styles S3 S4 For 249K steel styles 3 S4 27 Pipe Plug 2 req d For 249 cast iron CL125 CL250 For 249B steel 29 Liquid Damper 530400 NPS 1 1 2 connection NPS 2 connection 30 Bli
5. or a dented or corroded displacer can impair performance If the displacer rests against the travel stop appears to be overweight or causes output drift or other output inaccuracies it may have been penetrated by process pressure or liquid Such a displacer may contain pressure Instruction Manual 249 Caged Sensors D200099X012 August 2014 because it was in a pressurized vessel may contain process liquid that becomes pressurized due to a change in temperature and may contain process liquid that is flammable hazardous or corrosive A WARNING Sudden release of pressure contact with hazardous liquid fire or explosion which may result in personal injury or property damage can occur if a displacer that is retaining pressure or process liquid is punctured subjected to heat or repaired Handle the displacer with care 1 Before starting any maintenance procedure be sure the following safety actions have been completed e Relieve process pressure in the vessel where the 249 sensor is installed e Drain the process liquid from the vessel e Shut off any electrical or pneumatic input to the controller or transmitter attached to the 249 sensor and vent any pneumatic supply pressure Remove the controller or transmitter from the torque tube arm e Be sure the cage is also free of process pressure and or liquid Use caution when loosening flange bolting or pipe plugs e Be sure process pressure or liquids have not penetrated the displac
6. personal injury or property damage Parts Kits Description Sensor Parts Kits Kit contains keys 9 11 12 13 14 For 249 Kit includes 1 cage gasket key 12 for 249 CL125 and 1 cage gasket key 12 for 249 CL250 For 249B Parts List Note Part Number R249X000022 R249BX00012 Part numbers are shown for recommended spares only For part numbers not shown contact your Emerson Process Management sales office Key Description Sensor Common Parts Cage Cage Head Torque Tube Arm Driver Bearing 31600 Driver Bearing 1 31600 2 req d Retaining Flange see above note Recommended spare parts 1 This part is available in a wide variety of materials of construction part dimensions or other specifications Listed here are standard or typical materials dimensions or specifications Contact your Emerson Process Management sales office for assistance in selection of specific materials dimensions or specifications Key 9 11 12 Description Rod Driver Assy 531600 stainless steel SST 249 and 249B 249C Standard wall torque tube Heavy wall torque tube 249K 249L Positioning Plate Steel Torque Tube Assy 1 249 and 249B N05500 Standard wall Thin wall Heavywall 249C S31600 Standard wall Heavy wall 249K and 249L N05500 Standard wall Thin wall Displacer 249 and 249B 3X 14 Inches 1600 psi 530400 2 X 32 Inches 1500 psi 31600 1 5 8 X 48 Inches 1
7. 22 Z E Sane A E lt 2 Wn eS f TNO TT Sr A f 7724 S TAS LCS REN AE 9 1 20 lt N CN SSS 13 S EA gt ANY 9 30 1915 TA ELA d 7 Yi 2 2 t 1917 E N LUC IN ai N 2 N Ip m N i b N DETAIL OF STYLE 1 OR 2 CONNECTIONS SN 1 SECTION 30 1914 Key Description Part Number Key Description 127 Iron gasket 16 Groove Pin 531600 249L only 1N946121992 13 Gasket 1 249 249B and 249C Graphite stainless steel 1E5629X0072 Notes 249K composition stainless steel 1N9243X0012 13 Ring Iron gasket For key 17 see figure 5 Two styles of vessel cage connections 2491 only 14445521992 available screwed S and flanged F Four connection configurations are available 14 Tube End Gasket 249 249B 249C 249K and 249L 1 top and bottom of cage e 2 top and lower side of cage Graphite stainless steel 0Y0876X0052 e 3 cect 14 Outer End Gasket For 249L e 4 upper side and bottom of cage Styles 1 2 3 4 refer to either screwed or flanged Styles 51 52 53 S4 UNS FADE refer to screwed connections Styles F1 F2 F3 FA refer to flanged 15 X StudBolt 4 req d 249 and 249B Steel B7 249C Steel
8. 800 psi 530400 1 1 2 X 60 Inches 1800 psi 530400 1 3 8 X 72 Inches 1400 psi 530400 249C 1 1 2 X 32 Inches 1300 psi 531600 2 3 8 X 14 Inches 1400 psi 531600 249K 1 3 4 X 32 Inches 4200 psi 530400 2 3 4 X 14 Inches 6000 psi 530400 249L 2 3 4 X 14 Inches 6000 psi S30400 Cotter Spring N04400 2 req d Cage 1 For 249 Graphite stainless steel Unless otherwise noted CL125 CL250 249B 0Y0873X0082 249C 1F8305X0062 249K composition stainless steel Part Number 1K4493X0012 1K4495X0012 1K4497X0012 1K4505000A2 1K4503000A2 1K4499X0012 1K4501X0012 14517942022 0Y0944X0032 0Y0945X0032 1N9242X0012 13 Instruction Manual 249 Caged Sensors August 2014 D200099X012 Figure 8 Fisher 249 Sensor Construction amp amp amp G SG 272 NS pL SOs KS it Y SS NES UN 9 amp amp 2 2 89 s S CO 9 Cai NG e ila 2 2 e J Lhd S SECTION LLLLALALALLL LLL LL 7 2 mn Oa ara Ax 2 2202047 Ss PN 7 20 DETAIL OF CL250 S2 53 OR S4 CONNECTIONS Instruction Manual 249 Caged Sensors D200099X012 August 2014 Figure 9 Fisher 249B Sensor Construction E
9. 87 Brazil Chatham Kent ME4 4QZ UK Dubai United Arab Emirates Singapore 128461 Singapore www Fisher com E M ERSON 1976 2014 Fisher Controls International LLC All rights reserved a A
10. B7 249K and 249L Steel B7 connections Recommended spare parts 1 This part is available in a wide variety of materials of construction part dimensions or other specifications Listed here are standard or typical materials dimensions or specifications Contact your Emerson Process Management sales office for assistance in selection of specific 15 materials dimensions or specifications 249 Caged Sensors August 2014 Figure 10 Fisher 249C Sensor Construction SECTION A A TL lt a 7 EM i SIT TS 2 4 ye S gt 9 S amp ERERE REED a 9 NS _ Sod i DAH 2 2 Fil 30A7425 B 17 30A7428 B Key Description 17 Pipe Plug For 249B styles 2 3 steel For 249C styles 2 3 531600 For 249K and 249L styles 2 3 steel 18 HexNut 4 req d For 249 and 249B steel B7 249C steel B7 For 249K and 249L steel B7 19 Cap Screw steel B7 4 req d For 249 CL125 CL250 19 BoltStud steel B7 4 req d For 249B 249C For 249K 16 Instruction Manual D200099X012 a Va 4 SAAAAAXNANANASANASSSSSAASASSSSSNNSNANNANANSANATSTEANSSIZ BE MK 7A 4 VP u m s lt ANIS T EE aw DETAIL OF STYLE 3 OR 4 CONNECTIONS Key Descrip
11. E EDGE BEARING ROTATABLE HEAD TORQUE TUBE DISPLACER ROD X1114 DISPLACER CAGE SHIPPING STOP ROD 98 SHIPPING BLOCK LOCK NUT W2141 1 Instruction Manual 249 Caged Sensors D200099X012 August 2014 The unconnected end of the tube is sealed by a gasket and clamped rigidly to the torque tube arm permitting the protruding end of the shaft to twist and therefore transmit rotary motion This allows the interior of the torque tube to remain at atmospheric pressure thus eliminating packing and the disadvantages of packing friction The displacer always exerts a downward force on one end of the displacer rod The other end of the displacer rod rests on the knife edge of the driver bearing A keyed shaft on the bearing end of the displacer rod fits into a socket on the outside of the welded end of the torque tube assembly A change in liquid level interface level or density specific gravity buoys up the displacer by a force equal to the weight of the liquid displaced Corresponding vertical movement of the displacer results in angular movement of the displacer rod around the knife edge Since the torque tube assembly is a torsional spring which supports the displacer and determines the amount of movement of the displacer rod for a given displacement change it will twist a specific amount for each increment of buoyancy change This rotation is brought through the torque tube arm by the protruding rotary shaft A controller
12. Instruction Manual 249 Caged Sensors D200099X012 August 2014 Fisher 249 Caged Displacer Sensors Contents Figure 1 Fisher 249B Sensor with 2500 Controller I EFOGUCLION 32 59 1 Scope of 1 D eSCEIBEIOR Radice eta ae Ee Db du 2 Type Number Description 3 Educational Services 4 Pc c A Cleaning the Cage 5 Removing the Displacer and Stem 6 Replacing the Displacer Cotter Spring Stem End Piece and Displacer Spud 7 Replacing the Displacer Rod Driver Assembly 8 Replacing the Torque Tube 9 Changing Cage Head Position 10 Replacing the Torque Tube Arm and Changing the Mounting 11 Simulation of Process Conditions for Calibration of Fisher Level Controllers and Transmitters 12 Related Documents 12 Parts OlderiliQucse eos aa pee o actae tet 12 Qty LEER 13 utr Web oa tam tote nota onset eae 13 Introduction Scope of Manual This instruction manual includes maintenance and parts ordering information for 249 caged 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 info
13. UE TUBE AND DISPLACER ROD ASSEMBLY W0654 1 REMOVAL OR INSTALLATION OF POSITIONING PLATE Replacing the Torque Tube Corrosion or leakage through the outer end of the torque tube is evidence of deterioration in the torque tube assembly key 9 or torque tube end gasket key 14 Erratic or nonexistent rotary shaft output may occur if the socket on the inner end of the torque tube assembly does not engage the bearing end of the displacer rod assembly key 7 249 Caged Sensors Instruction Manual August 2014 D200099X012 1 Afterfollowing the proper procedure to remove the cage head and the displacer from the cage move the sensor assembly to a suitable maintenance area CAUTION Support the sensor assembly to avoid damage to the displacer displacer stem displacer rod assembly and associated parts 2 Remove the controller transmitter and displacer key 10 Then remove the hex nuts key 20 that hold the torque tube arm key 3 to the cage head key 2 Separate the torque tube arm from the cage head 3 Remove the nuts key 18 and retaining flange key 6 holding the positioning plate key 8 at the end of the torque tube arm CAUTION If the displacer is still attached to the displacer rod at this point be careful not to let the torque tube assembly slip when using the screwdriver leverage procedure in steps 4 and 6 Sudden release of the displacer could cause damage A Remove the positioning plate key 8 by freeing its tw
14. e disconnected at the lower connection and the liquid damper key 29 removed Remove the damper by prying it out of a flanged connection or by unscrewing it from a screwed connection with a 1 2 inch hex Allen wrench If necessary completely remove the style 4 cage from the vessel 5 For complete drainage and cleaning of a cage with style 2 or 3 screwed or flanged connections figure 5 remove the pipe plug keys 17 or 26 from the bottom of the cage Remove the liquid damper key 29 If necessary completely remove the cage from the vessel Figure 5 Cage Connection Styles STYLE 1 TOP STYLE 2 TOP STYLE 3 UPPER STYLE 4 UPPER AND BOTTOM AND LOWER SIDE AND LOWER SIDE SIDE AND BOTTOM SCREWED S1 SCREWED S2 SCREWED S3 SCREWED S4 FLANGED F1 FLANGED F2 FLANGED F3 FLANGED F4 A1271 2 6 Use appropriate cleaning techniques tools and solutions After cleaning the cage install the liquid damper and reconnect the cage to the vessel Install the cage head and controller transmitter Properly calibrate the controller transmitter following the procedures given in the controller transmitter instruction manual Removing the Displacer and Stem The displacer key 10 is a sealed container If the displacer has been penetrated by process pressure or liquid it may hold pressure or hazardous liquid for an extended period Process residue buildup on the displacer and stem key 24 may change displacer weight or displacement A bent stem
15. er 2 Properly support the cage head or sensor head key 2 and the torque tube arm key 3 Remove the cap screws or stud bolts key 21 and hex nuts key 22 that hold the cage head to the cage CAUTION When removing the sensor from the cage the displacer may remain attached to the displacer rod and be lifted out with the cage head key 2 when the cage head is removed If separating the displacer and displacer rod drive assembly key 9 before removing the cage head remove the cotter spring key 11 Be careful not to let the displacer slip and drop into the bottom of the cage as displacer damage could result 3 When removing the sensor from the cage the displacer may remain attached to the displacer rod and be lifted out with the cage head key 2 when the cage head is removed If separating the displacer and displacer rod driver assembly key 9 before removing the cage head remove the cotter spring key 11 according to the Replacing the Displacer Cotter Spring Stem End Piece and Displacer Spud section Be careful not to let the displacer slip and drop into the bottom of the cage as displacer damage could result 4 Carefully remove the cage head and lift out the displacer key 10 If the displacer comes out with the cage head be careful not to damage the displacer or bend the stem when setting the cage head down 5 Follow the procedure for replacing the displacer displacer rod assembly cotter spring stem end piece and dis
16. ing the lower bearing driver bolt Install a new bearing driver and the lower bearing driver bolt 8 Install the new displacer rod driver assembly on the knife edge of the bearing driver Install the upper bearing driver bolt key 5 but do not tighten 9 Insert new tube end gasket into recess in torque tube arm 10 Insert the torque tube assembly and rotate until its socket mates with the displacer rod assembly and so that the outer tube flange rests against the gasket 11 With a thumb on the upper portion of the positioning plate and a screwdriver in the slots as shown in figure 6 rotate the plate and press the lug on the plate into the hole in the torque tube arm this will preload the torque tube 12 Install the retaining flange and secure it with four nuts key 18 being sure to tighten all nuts evenly 13 Tighten the upper bearing driver bolt key 5 It will be necessary to put slight pressure on the displacer rod driver assembly to access the upper bearing driver bolt 14 If necessary clean the cage following the procedure in this manual Install the cage head and controller transmitter Properly calibrate the controller transmitter following the procedures given in the controller transmitter instruction manual Figure 6 Torque Tube and Displacer Rod Assemblies DISPLACER ROD ASSEMBLY ROTARY GASKET SHAFT TORQUE TUBE OUTER TUBE END POSITIONING PLATE W0145 2 ae DRIVER BEARING EXPLODED VIEW OF TORQ
17. m e Be sure the cage is also free of process pressure and or liquid Use caution when loosening flange bolting or pipe plugs e Be sure process pressure or liquids have not penetrated the displacer 2 Remove the hex nuts keys 20 or 22 from the bolting key 21 and reposition the head as desired Replacing the Torque Tube Arm and Changing the Mounting 1 Looseness of the driver bearing key 4 wear on its knife edged surface or a bent worn or corroded displacer rod assembly key 7 may impair performance Be especially sure to check the ball on the displacer rod 2 After following the proper procedure to remove the cage head and the displacer from the cage move the sensor assembly to a suitable maintenance area CAUTION Support the sensor assembly to avoid damage to the displacer displacer stem displacer rod assembly and associated parts 3 Remove the controller transmitter and displacer key 10 Then remove the hex nuts key 20 that hold the torque tube arm key 3 to the cage head key 2 Separate the torque tube arm from the cage head 249 Caged Sensors Instruction Manual August 2014 D200099X012 4 Follow the proper procedure to remove the torque tube assembly key 9 5 Remove the bearing bolts key 5 displacer rod assembly and driver bearing 6 Determine the new mounting orientation Note Be sure that the driver bearing will be installed so that its knife edge is pointing up when the torque tube arm is mou
18. nd Flange For 249L 31 Ring Iron gasket For 249L 1P476921042 32 StudBolt steel B7 4 req d For 249L 33 Hex Nut steel 4 req d For 249L 35 Heat Insulator Ass y Use only when specified 18 Key 36 37 38 39 40 51 53 54 55 56 Instruction Manual D200099X012 Description Shaft Coupling for heat insulator ass y Use only when specified Shaft Extension for heat insulator ass y Use only when specified Set Screw for heat insulator ass y 2 req d Use only when specified Cap Screw for heat insulator ass y 4 req d Use only when specified Cap Screw for heat insulator ass y 4 req d Use only when specified Arm Flange For 249B partial cage ass y Washer for heat insulator ass y 4 req d Use only when specified Nameplate Drive Screw NACE Nameplate Shipping Block zinc not shown Shipping Cone cast iron not shown Recommended spare parts 1 This part is available in a wide variety of materials of construction part dimensions or other specifications Listed here are standard or typical materials dimensions or specifications Contact your Emerson Process Management sales office for assistance in selection of specific materials dimensions or specifications Instruction Manual 249 Caged Sensors D200099X012 August 2014 Figure 12 Fisher 249L Sensor Construction DE Noo pum Jim 21 7 IN S lt b EUN
19. nted in the desired orientation figure 7 Since changing the mounting position of the torque tube arm by 180 will change controller or transmitter action from direct to reverse or vice versa the controller transmitter action must be reversed from what it was before the mounting method was changed 7 Install the driver bearing displacer rod assembly and bearing bolts key 5 into the torque tube arm Install a new arm gasket Install the torque tube arm in the desired mounting position on the cage head and secure it with the proper bolting keys 19 and 20 8 Install the torque tube assembly Install the displacer 9 If necessary clean the cage following the procedure in this manual Install the cage head and controller transmitter Properly calibrate the controller transmitter following the procedures given in the controller transmitter instruction manual Simulation of Process Conditions for Calibration of Fisher Level Controllers and Transmitters Contact your Emerson Process Management sales office for information on obtaining the Supplement to 249 Sensor Instruction Manuals Simulation of Process Conditions for Calibration of Fisher Level Controllers and Transmitters or visit our website at www Fisher com Related Documents This section lists other documents containing information related to the 249 level sensor These documents include e 2500 249 Pneumatic Controllers and Transmitters Bulletin 34 2 2500 e Fisher Level Contr
20. o lugs The vertical lug fits into a hole in the flange of the torque tube arm top of figure 6 left The horizontal lug hidden behind the screwdriver at the bottom of figure 6 left fits into a slot in the outer tube end of the torque tube assembly the figure 6 exploded view shows this lug to the right of the outer tube end The positioning plate may be pried away from the torque tube arm and outer tube end if the displacer already has been disconnected from the displacer rod However if the displacer is still connected to the displacer rod place a screwdriver blade in the slots of the positioning plate and outer tube end as shown in figure 6 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 5 Pull the torque tube assembly and tube end gasket out of the torque tube arm Remove the tube end gasket key 14 and discard a new gasket will be installed in step 6 Clean and inspect the gasket mating surfaces O Insert new tube end gasket into recess in torque tube arm Insert the torque tube assembly into the torque tube arm as shown in figure 6 Rotate the torque tube assembly until its socket mates with the driver member on the displacer rod assembly and so that the outer tube flange rests against the gasket With a thumb on the upper portion of the positioning
21. ocedure be sure the following safety actions have been completed e Relieve process pressure in the vessel where the 249 sensor is installed e Drain the process liquid from the vessel e Shut off any electrical or pneumatic input to the controller or transmitter attached to the 249 sensor and vent any pneumatic supply pressure Remove the controller or transmitter from the torque tube arm key 3 Take care not to damage the torque tube assembly key 9 inside the torque tube arm e Be sure the cage is also free of process pressure and or liquid Use caution when loosening flange bolting key 22 or pipe plugs keys 17 26 or 27 e Besure process pressure or liquids have not penetrated the displacer key 10 2 Properly support the cage head key 2 and the torque tube arm Remove the cap screws or stud bolts key 21 and hex nuts key 22 that hold the cage head to the cage 249 Caged Sensors Instruction Manual August 2014 D200099X012 CAUTION When removing a sensor from a cage the displacer may remain attached to the displacer rod and be lifted out with the cage head when the cage head is removed If separating the displacer and displacer rod before removing the cage head remove the cotter spring key 11 Be careful not to let the displacer slip and drop into the bottom of the cage as displacer damage could result 3 Carefully remove the cage head and lift out the displacer 4 Astyle 1 or 4 screwed or flanged cage must b
22. oller and Transmitter Dimensions Bulletin 34 2 249 e Simulation of Process Conditions for Calibration of Fisher Level Controllers and Transmitters Supplement to 249 Sensor Instruction Manuals D103066X012 e Bolt Torque Information Supplement to 249 Sensor Instruction Manuals D103220X012 e Torque Tube Identification Supplement to 249 Sensor Instruction Manuals D103283X01 2 All documents are available from your Emerson Process Management sales office Also visit our website at www Fisher com Parts Ordering Whenever corresponding with your Emerson Process Management sales office about this equipment always mention the sensor serial number Each sensor is assigned a serial number which is stamped on a nameplate key 54 not Instruction Manual D200099X012 249 Caged Sensors August 2014 shown attached to the torque tube arm This same number also appears on the controller transmitter nameplate when a complete controller transmitter sensor unit is shipped from the factory When ordering a replacement part be sure to include the 11 character part number from the following parts list A WARNING Use only genuine Fisher replacement parts Components that are not supplied by Emerson Process Management should not under any circumstances be used in any Fisher instrument Use of components not supplied by Emerson Process Management may void your warranty might adversely affect the performance of the instrument and could cause
23. or transmitter attached to the end of the rotary shaft converts the rotary motion into varying pneumatic or electric signals Figure 4 shows how the controller or transmitter mounts on the torque tube arm Unless otherwise noted all NACE references to NACE MR0175 2002 Figure 4 Torque Tube Arm Exploded View Showing Controller or Transmitter Mounting CONTROLLER OR TRANSMITTER DLC3010 DLC3020f SHOWN POSITIONING PLATE RETAINING FLANGE TORQUE GASKET TUBE ARM OUTER TUBE END MOUNTING HOLES ACCEPT FOUR STUDS OR CAP SCREWS DEPENDING ON CONTROLLER OR ROTARY SHAFT TRANSMITTER HEX NUTS OR CAP 51212 SCREWS DEPENDING ON CONTROLLER OR TRANSMITTER Type Number Description e 249 CL125 or 250 cast iron cage with screwed or flanged connections 249B CL150 300 or 600 steel cage with screwed or flanged connections 249BF CL150 300 or 600 cast steel or stainless steel cage with flanged connections only Available from Emerson Process Management in Europe only 249C CL150 300 or 600 stainless steel cage with screwed or flanged connections 249K CL900 or 1500 steel cage with flanged connections only e 2491 1 2500 steel cage with flanged connections only The cage head on all of the 249 constructions may be rotated to any of the eight alternate positions shown in figure 7 Connection sizes are either NPS 1 1 2 or 2 249 Caged Sensors Instruction Manual August 2014 D200099X012 The Par
24. ove the cotter spring to free the displacer or stem end piece from the ball end of the displacer rod driver assembly Lift the displacer or stem end piece from the ball 4 Replace worn or damaged parts as necessary Return the displacer or stem end piece to the displacer rod driver assembly Install the cotter spring 5 If necessary clean the cage following the procedure in this manual Install the cage head and controller transmitter Properly calibrate the controller transmitter following the procedures given in the controller transmitter instruction manual Replacing the Displacer Rod Driver Assembly The ball on the displacer rod driver assembly key 7 may be either too worn for a secure connection or so corroded that the displacer does not pivot properly Replace the displacer rod driver assembly if necessary CAUTION If the displacer is to be disconnected from the displacer rod driver assembly before being removed from the cage provide a suitable means of supporting the displacer to prevent it from dropping into the cage and being damaged 1 After following the proper procedure to remove the cage head and the displacer from the cage move the sensor assembly to a suitable maintenance area Properly support the assembly to avoid damage to the displacer displacer stem displacer rod assembly and associated parts 2 Remove the controller transmitter and displacer key 10 Then remove the hex nuts key 20 that hold the torque
25. placer spud as necessary Replacing the Displacer Cotter Spring Stem End Piece and Displacer Spud The cotter spring key 11 the ball on the displacer rod driver assembly key 7 and the stem end piece key 23 or displacer spud socket may be either too worn for a secure connection or so clogged or corroded that the displacer does not pivot properly Replace these parts as necessary 249 Caged Sensors Instruction Manual August 2014 D200099X012 CAUTION If the displacer is to be disconnected from the displacer rod before being removed from the cage provide a suitable means of supporting the displacer to prevent it from dropping into the cage and being damaged 1 After following the proper procedure to remove the cage head and the displacer from the cage move the sensor assembly to a suitable maintenance area Properly support the assembly to avoid damage to the displacer displacer stem displacer rod driver assembly and associated parts 2 Reach the cotter spring displacer spud ball end of the displacer rod driver assembly stem end piece or displacer stem connector as follows Allsensors with style 1 or 2 screwed or flanged connections through the top connection e 249L sensors with style 3 or 4 screwed or flanged connections by removing the hex nuts key 33 flange key 30 and ring key 31 e All other sensors with style 3 or 4 screwed or flanged connections by removing the top pipe plug key 26 3 Rem
26. plate and a screwdriver in the slots as shown in figure 6 rotate the plate and press the lug on the plate into the hole in the torque tube arm this will preload the torque tube Install the retaining flange and secure it with four nuts key 18 being sure to tighten all nuts evenly WO If necessary clean the cage following the procedure in this manual Install the cage head and controller transmitter Properly calibrate the controller transmitter following the procedures given in the controller transmitter instruction manual Changing Cage Head Position The cage head key 2 may be mounted so that the torque tube arm key 3 is in any one of eight alternate positions around the cage as shown in figure 7 Neither the displacer nor the torque tube arm need be removed when head position is changed 10 Instruction Manual 249 Caged Sensors D200099X012 August 2014 Figure 7 Cage Head Mounting Positions RIGHT HAND MOUNTING LEFT HAND MOUNTING 15 67FRFILTER REGULATOR AH9150 A A2613 2 1 Before starting any maintenance procedure be sure the following safety actions have been completed e Relieve process pressure in the vessel where the 249 sensor is installed Drain the process liquid from the vessel Shut off any electrical or pneumatic input to the controller or transmitter attached to the 249 sensor and vent any pneumatic supply pressure Remove the controller or transmitter from the torque tube ar
27. rmation refer to the appropriate controller transmitter instruction manual Note Caged sensors have a rod and block shipping lock installed on each end of the displacer to protect the displacer in shipping as shown in figure 2 Remove these parts before installing the sensor to allow the displacer to function properly 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 ae EMERSON www Fisher com Process Management Instruction Manual 249 Caged Sensors D200099X012 August 2014 carefully read understand and follow all 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 before proceeding Description 249 sensors are designed to measure liquid level interface level or density specific gravity inside a vessel A torque tube assembly figure 3 and displacer provide an indication of liquid level interface level or density specific gravity The torque tube assembly consists of a hollow torque tube with a shaft welded inside it at one end and protruding from it at the other end Figure 2 Rod and Block Shipping Lock Figure 3 Typical Caged Displacer SHIPPING BLOCK LOCK NUT SHIPPING STOP ROD W1800 1 KNIF
28. tion 20 21 21 Hex Nut steel For 249 CL125 12 req d CL250 4 req d For 249B 249C 8 req d For 249K 8 req d For 249L 4 req d Cap Screw steel B7 8 req d For 249 CL125 CL250 Bolt Stud B7 8 req d For 249B For 249C For 249K For 249L 1 This part is available in a wide variety of materials of construction part dimensions or other specifications Listed here are standard or typical materials dimensions or specifications Contact your Emerson Process Management sales office for assistance in selection of specific materials dimensions or specifications Instruction Manual D200099X012 Figure 11 Fisher 249K Sensor Construction DIO A 2 T V bk e WLLL f 30A7429 B G Key Description 22 HexNut steel For 249 CL250 8 req d For 249B 16 req d For 249C 8 req d For 249K 8 req d For 249L 16 req d 23 Displacer Stem End Piece 531600 Notes For key 24 see figure 5 Two styles of vessel cage connections are available screwed S and flanged F Four connection configurations are available e 1 top and bottom of cage e 2 top and lower side of cage e 3 side of cage only e 4 upper side and bottom of cage Styles 1 2 3 4 refer to either screwed or flanged Styles 1 S2 3 S4 refer to screwed connections Styles F1 F2 F3 F4 refer to flanged connections 1 This part is available
29. ts List section shows some 249 sizes by construction standard displacer lengths and standard materials and table 1 contains displacer and torque tube materials However 249 parts are available in a wide variety of materials of construction part dimensions and other specifications Contact your Emerson Process Management sales office for assistance in selection of specific materials dimensions and specifications Table 1 Displacer and Torque Tube Materials bo Pat S Standard Material Other Materials 304 Stainless Steel 316 Stainless Steel N10276 NO4400 Plastic and Special Alloys Disp acer zu Driver nearma 316 Stainless Steel N10276 N04400 other Austenitic Stainless Steels and Special Alloys Displacer Rod and Driver Torque Tube 05500 1 316 Stainless Steel NO6600 N10276 1 N05500 is not recommended for spring applications above 232 C 450 F Contact your Emerson Process Management sales office or application engineer if temperatures exceeding this limit are required Educational Services For information on available courses for 249 displacer sensors as well as a variety of other products contact Emerson Process Management Educational Services Registration Phone 1 641 754 3771 or 1800 338 8158 e mail education emerson com http www emersonprocess com education Maintenance Sensor parts are subject to normal wear and must be inspected and replaced as necessary The frequency of inspection and replacement
30. tube arm key 3 to the cage head key 2 Separate the torque tube arm from the cage head 3 Remove the nuts key 18 and retaining flange key 6 at the end of the torque tube arm 4 Remove the positioning plate key 8 by freeing its two lugs The vertical lug fits into a hole in the flange of the torque tube arm top of figure 6 left The horizontal lug hidden behind the screwdriver at the bottom of figure 6 left fits into a slot in the outer tube end of the torque tube assembly the figure 6 exploded view shows this lug to the right of the outer tube end Instruction Manual 249 Caged Sensors D200099X012 August 2014 Place a screwdriver blade in the slots of the positioning plate and outer tube end as shown in figure 6 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 5 Pull the torque tube assembly out of the torque tube arm Remove the tube end gasket key 14 and discard a new gasket will be installed in step 9 Clean and inspect the gasket mating surfaces 6 Using the proper tool loosen and then remove the upper bearing driver bolt key 5 Lift the displacer rod driver assembly from the knife edge of the driver bearing key 4 7 Visually inspect the bearing driver for corrosion or wear If replacement is necessary remove the bearing driver by remov
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