Emerson Fisher 249W Instruction Manual
Contents
1. place that Is retaining pressure or process s punctured subjected to heat or repaired Handle the displacer with care Consider the characteristics of the specific proces 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 12 13 trouble symptoms peculiar to specific parts are discussed in the following sections Each section is sbecficto these parts Regardless of locaton 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 the 249W assembly as shown in figure 14 Refer to figure 14 for key number locations Removing the Displacer and Stem Refer to the Maintenance WARNING at the beginning of this section The displacer key 4 is a sealed container Ifthe 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 11 may change displacer weight or displacement A bent stem ora dented or corroded displacer can impair performance Ifthe displacer rests against the travel stop appears to be overweight or causes output drift or other output inaccuracies may have been penetrated by process pressure or liquid Such a displacer may contain pressure because iwas ina pressur2. cage Figure 6 provides the 249W dimensions required to fabricate a cage Figure 7 provides overall envelope dimensions for a 249W sensor and DLC3010 DLC3020f controller and figure provides overall envelope dimensions for a 249W and 2500 controller or transmitter 249W Sensor Instruction Manual December 2012 m Figure 6 Typical Cage Connections H SHOWN LLSTRATE COINECTENS ARE ALSO APPUCALE TO THE2500 Instruction Manual zaw D102503x012 December2012 Figure 7 Overall Envelope Dimensions for Fisher 249W DLC3010 or DLC3020f for Mounting on Customer Supplied Cage LEFT HAND MOUNT RIGHT HAND MOUNT ERES ates ies FOPA LENGTH STANDS Meus HEAT INSULATOR EXTENSION 249W Sensor Instruction Manual December 2012 m Figure 8 Overall Envelope dimensions for Fisher 249W 2500 for Mounting on Customer Supplied Cage LEFT HAND MOUNT RIGHT HAND MOUNT M Gaj Instruction Manual 249W Sensor pm December 2012 When fab
3. keys 19 and 20 10 Install the sensor and controller transmitter Calibrate the controller transmitter following the procedures ven in thecontroller transmitter instruction manual Changing the Mounting from Left Hand to Right Hand or Vice Versa Looseness ofthe driver bearing key 7 wear on its knife edged surface bent worn or corroded displacer vodjdiver assembly key 5 may performance Be especially sure to check he ballon the displace rod CAUTION Support the sensor assembly to avoid damage tothe displacer displacer stem displacer rod assembly and associated parte 1 Alter following the proper procedure to remove the sensor and the displacer from the process vessel or dsplacer age move the sensor assembly toa sultable maintenance area 2 Remove the controller transmitter and displacer key 4 Then remove the hex nuts key 20 that hold the torque tube arm key 2 to the wafer body key 1 Separate torque tube arm from the wafer body 3 Follow the proper procedure to remove the torque tube assembly key 3 4 Remove the driver bearing bolts key 8 dsplacerrod rver assembly key 5 and driver bearing key 7 Note Be sure to install the driver bearing so its knife edge is pointing up when the torque tube armis mounted in the desired orientation Since changing the mounting position ofthe torque tube arm by 180 will change controller or transmitter action from direct to reverse or
4. parts are subject to normal wear and must be inspected and replaced as necessary The frequency of inspection and replacement depends upon the severity of sevice conditions WARNING NN Avoid personal injury or property damage resulting from the sudden release of pressure Before performing any Maintenance procedure Always wear protective dothing gloves and eyewear Relieve any process pressure in the process vessel where the 249W sensor is installed Drain the process liquid from the process vessel Shut off any electrical or pneumatic input to the controller or transmitter attached to the 249W sensor and vent any pneumatic supply pressure Use caution when loosening flange bolting or pipe plugs Remove the controller or transmitter from the torque tube arm key 2 Before performing any maintenance procedure requiring the handling of the displacer inspect the displacer key 4 to make sure process pressure or liquids have not penetrated the displacer 249W Sensor Instruction Manual December 2012 m if penerate by proces pres oud he pressure asa result of being in a pressurized vessel liquid that becomes pressurized due to a change in temperature thats 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
5. to the wafer body d Connect the displacer as shown in figure 9 locking the assembly with the cotter springs provided Ifa stem extension is used between the displacer spud and the stem end piece make sure the nuts are tight at each end of testem 249W Sensor December 2012 Instruction Manual Figure 3 Displacer and Displacer Rod Connections Figure 10 Positioning Fisher 249W Wafer Body on the Connecting Flange p Note Inthe next step if mounting the wafer body on a displacer cage anda flange adaptor is required install the fange adaptor instead ofthe blind fange 5 Referto figure 11 Place a second seal on top of the wafer body Place a blind flange on the wafer body so that the holes in the blind flange align with the holes in the connecting flange 6 Refer to figure 12 Secure the wafer body between the blind flange and connecting flange by inserting the remaining studs and nuts Tighten the nuts just enough to hold the wafer body in place 7 Remove the nut from the stud that was used in step 2 Reinsert the stud soit passes through the holes in the blind flange and connecting flange Thread the nut back onto the stud 8 Tighten all nuts in a crisscross fashion to the torque recommended in tables 2 or 3 Figure 11 Blind Fange Installation Figure 12 Fisher 249W Installation Complete Instruction Manual 249W Sensor pm December 2012 Table 2 Recommended Bolt Torque for Typ
6. vice versa controllerftransmritter action must be reversed from what it was before the mounting method was changed 5 Install the driver bearing key 7 displacer rod driver assembly key 5 and bearing bolts key 8 into the torque tube arm key 2 installa new arm gasket key 12 Install the torque tube arm on the wafer body and secure it with the proper bolting keys 19 and 20 6 Install the sensor and controller transmitter Calibrate the controllerftransmitter 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 Transmitter D103066x012 Instruction Manual 249W Sensor prom December 2012 Related Documents This section sts other documents containing information related to the 249W level sensor These documents include 2500 249 Pneumatic Controllers and Transmitters Bulletin 342 2500 Fisher Level Controller and Transmitter Dimensions Bulletin 34 2 249 Fisher L3 Pneumatic Level Controller Bulletin 34 213 Simulation of Process Conditions for Calibration of Fisher Level Controllers and Transmitters Supplement to 249 Sensor instruction Manuals D103066X012 Bolt Torque Info
7. DED VIEW OF TORQUE TUBE AND DISPLACER ROD ASSEMBLY REMOVAL ORINSTALLATION OF POSITIONING PLATE 1 After following the proper procedure to remove the sensor and the displacer from the process vessel or dsplacer age move the sensor assembly to sultable maintenance area Support the assembly to avoid damage to the displacer displacer stem displacer rod assembly and associated pars 2 Remove the controller transmitter and displacer key 4 Then remove the hex nuts key 20 that hold the torque tube arm key 2 to the wafer body key 1 Separate the torque tube arm from the wafer body 3 Remove the nuts key 18 and retaining flange key 14 holding the positioning plate key 15 at the end ofthe torque tube arm CAUTION H 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 Sudden release of the displacer could cause damage to the spacer or torque tube assembly 4 Remove the positioning plate key 15 by freeing its two lugs The vertical lugfits into a hole in the flange of the torque tube arm figure 13 The horizontal lug hidden behind the screwdriver in figure 13 fits into a slot in the outer tube end of the torque tube assembly the figure 13 exploded view shows this lug to the right of the outer tube end The postioning plate may be pried away from the torque tube arm and outer tube en
8. Instruction Manual 249W Sensor D102503x012 December 2012 Fisher 249W Cageless Wafer Style Displacer Sensor Figure 1 Fisher 249W Sensor with FIELDVUE DLCSO10 DLC3020f Digital Level Controller Contents Introduction 1 Scope of Manual 1 Description 2 ype Number Description 3 Educational Services instalation instalation on Top of Vessel 5 Installation with Displacer Cage on Side of Vessel 5 Mounting the Sensor on the Process Vessel or Displacer E Maintenance 10 2 sad Removing the Dislacer and Stem gt 2 Replacing the Displacer Cotter Spring Stem End Piece and Dislacer Spud 13 Replacing the Displacer Rod Driver Replacing the Torque Tube 177 UM Changing the Mounting from Left Hand to RightHand or Vice Versa 16 Simulation of Process Conditions for Calibration of Fisher Level Controllers and Transmitters 16 Related Documents Parts Ordering Determining Bonae Pants List 78 uo Introduction Scope of Manual Thisinstruction manual includes maintenance and parts ordering information for 249W cageless wafer style Although the sensors usually shipped with attached controller or transmitter as shown in figure 1 this manual does not include operation installation calbration maintenance or parts ordering i controllerftransmitter or for the complete ur Instruction manual information for the le appropriate controller trans
9. ate until its socket mates with the displacer assembly and so that the outer tube flange rests against the gasket TI Witha thumb on the upper portion of the positioning plate and screwdriver in the slots as shown in figure 13 rotate the plate and press the lug on the plate into the hole in the torque tube arm this wil preload the torque tube 12 Instali 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 8 It will be necessary to put slight pressure on the displacer roddriver assembly to access the upper bearing driver bolt 14 install the torque tube arm on the wafer body and secure it with the proper bolting keys 19 and 20 15 Install the sensor and controller transmitter Calibrate the controllerftransmitter following the procedures given in the controller transmitter instruction manual Replacing the Torque Tube Corrosion or leakage through the outer end of the torque tube i evidence of deterioration in the torque tube assembly key 3 or torque tube end gasket key 13 Erratic or nonexistent rotary shaft output may occur if the socket onthe inner end of the torque tube assembly does not engage the bearing end of the displacer rod driver assembly Instruction Manual 249W Sensor December 2012 Figure 13 Torque Tube and Displacer Rod Assemblies omamme 7 we BE EXPLO
10. d displace already has been disconnected from the displacer rod However I 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 13 Slowly tum the positioning plate to release its lug from the torque tube arm Then carefully tum the plate back to allow the displacerto come to rest and slip the other lug of the plate from its slot in the outer tube end 5 Pullthe torque tube assembly and tube end gasket out of the torque tube arm Remove the tube end gasket key 13 and discard a new gasket wil be installed in step 6 Clean and inspect the gasket mating surfaces 6 Installa new tube end gasket into recess in torque tube arm 7 Insert the torque tube assembly into the torque tube arm as shown in figure 13 Rotate the torque tube assembly socket mates with the driver member on the displacer rod assembly and so the outer tube flange rests 249W Sensor Instruction Manual December 2012 against the gasket With a thumb on the upper portion of the positioning plate and a screwdriver inthe slots as Shown in figure 13 rotate the plate and press the lug on the plate into the hole In the torque tube arm this wll preload the torque tube 8 Install the retaining flange and secure it with four nuts key 18 being sure to tighten all nuts evenly 9 Install the torque tube arm on the wafer body and secure It with the proper bolting
11. e displace 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 the bearing end of the displacer fits into a socket on the Gutsideof the welded end of the torque tube assembly Achange interface evel orden speci gravity buoys up the dspacecbyaforceequaltotheweight of the liquid displaced Corresponding vertical movement of the displacer results in angular movement of the displacer Tod around the knife edge Since the torque tube assembly isa torsional spring which supports the dsplacer 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 s brought through the torque tube arm by the truding rotary shaft A controller or transmitter attached to the end of the rotary shaft converts the rotary motion into varying pneumatic or electric signals igure shows how the controller or transmitter mounts on the torque tube Unless otherwise noted all NACE references are to NACE MRO175 2002 Instruction Manual 249W Sensor prm December 2012 Figure 3 Torque Tube Arm Exploded View Showing Controller or Transmitter Mounting uem Type Number Description 249W NPS 304 L150 C1300 or CLGOO steel cageless sensor The Parts List section shows some 249W constructions standard displacer len
12. e torque tube arm top of figure 13 left The horizontal lag hidden behind the screwdriver at the bottom of figure 13 left fits into a slot in the outer tube end of the torque tube assembly the figure 13 exploded view shows this lug to the right of the outer tube end Place a screwdriver blade in the slots of the positioning plate and outer tube end as shown in figure 13 Slowly turn the positioning plate to release its lug from the torque tube arm Then carefully tum the plate back to allow displacerto come torest and slip the other lug of the plate from its slot in the outer tube end 5 Puli the torque tube assembly out of the torque tube arm Remove the tube end gasket key 13 and discard a new gasket wil 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 Lift the displacer rodjdriver assembly from the knife edge of the driver bearing key 7 7 Visually inspect the bearing driver for corrosion or wear If replacement is necessary remove the bearing driver by removing 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 upper bearing driver bolt key 8 but do not tighten 9 Insert new tube end gasket into the recess in torque tube arm 10 insert the torque tube arm assembly and rot
13. er cage using the following procedure You may attach the displacer to the displacer rod before installing the sensor on the cage or vessel attach the displacer to the displacer rod as described in step 1 If the displacer diameter is small enough you may installa long or sectionalized displacer through the wafer body after itis positioned on the connecting flange In this case install the displacer instep 4 1 Place the seal on the connecting flange install the displacer insert the displacer in the vessel or cage Hold the wafer body above the connecting lange Connect the displacer as shown in figure 9 locking the assembly with the otter springs provided fa stem extension used between the placer spud and the stem end piece make sure the nuts are tight ateach end of the stem 2 To ositionthe wafer body on the connecting lange insert a stud with nut through the connecting flange and one ofthe eyelets on the wafer body as shown in figure 10 Screw a second nut onto the top of the stud to hold the wafer body in place This second nut may be removed after the top flange installed 3 Hyo installed the displacer in step 1 go to step S otherwise continue with step 4 4 If instaling along or sectionalized displacer a Remove the torque tube arm assembly and rod from the wafer body b Insert the displacer through the wafer body into the vessel or cage Reassemble the torque tube arm assembly and displacer rod
14. gths and standard materials and table 1 Contains materiais of construction However 249W parts are avaiable in a wide variety of materials of construction part dimensions and other specications Contact your Emerson Process Management sales ofice assistance In lection of spec materiis dimensions and specications Table 1 Materials of Construction a Ss e Piu EU mU ted cipe Eo comes eee Educational Services Forinformation on available courses for 249W level sensors as well as a variety of other products contact Emerson Process Management Educational Services Registration Box 190 301 Ist Ave Marshalltown IA 50158 2823 Phone 800 338 8158 or Phone 641 754 3771 FAXC 641 754 3431 educationtemerson com 249W Sensor Instruction Manual December a012 Installation WARNING Te avoid personal injury or property damage resulting from the sudden release of pressure Auays wear protective clothing loves and eyewear when performing any instalation operations to avoid personal jury Check with your process or safety engineer for any addtional measures that must be taken to protect against process media Mfistlingintoan existing application also refer to the WARMING at the beginning of the Maintenance section of this instruction manual The 249W sensor can be
15. ical Lubricants NPS 3 Flanges Wir it and at TERCER 5 5 Weder Mating ange d Tag Rem BERT en aa SAT TAIT suman 850 aseaza 190220 uoc seses esrra son ER eT BT suman 850 ses sse sev seat sens 20020 7 Ent io sensim asane ER SET TIES E Make 155221 scena s Er 155223 ons eso ona Table 3 Recommended Bolt Torque for Typical Lubricants NPS 4 Flanges E LIS zT T SESS same E23 Gao sesssnsosza sasatza 3e ioo 10020 1209212 290429 12222122 275220 EU Sierra sass aay Gio essen isset sasana isons Jo soo voz2e102 230223 gone 12222122 275220 sir E sae pns sesemor notappieabie 155123 setze L3 Er 3560625506 menm 250225 Maintenance Sensor
16. installed directly on the vessel as shown in figure 4 It also can be installed in a user fabricated mounted on the side of the vessel as shown in figure 5 The sensor mounts on the top of the vessel or in the diplacer cage using an NPS raised ace lange with the NPS 3 249W wafer body or an NPS 4 ralsedface ange with the NPS 4 249W water body Figure Fisher 249W Sensor Top Mounted on Vessel am ae Instruction Manual 249W Sensor December2012 Figures Fisher 249W Sensor Cage Mounted on Side of Vessel Installation on Top of Vessel Note Yastllvelisused instalitplumb so that the displacer does not touch the wall of the stile ifthe displacer touches the wal the unit will transmit an erroneous output signal Because displacer hangs inside the vessel provide around the displacer ifthe fluid isin a state of continuous agitation to avoid excessive turbulence around the displacer To attach the sensor body to the vessel requires a flanged connection on the vessel shown in figure 4 For interface or fluid level applications install a gauge glass on the vessel Installation with Displacer Cage on Side of Vessel Note Install the cage so that itis plumb the displacer must not touch the cage the dsplacer touches the cage wall the unit wil transmit an erroneous output signal Figure S shows the 249W sensor mounted on the side ofa vessel using a displacer
17. ized vessel may contain process quid that becomes pressurized due to a change n temperature and may contain proces liquid that flammable or hazardous Sudden release of pressure contact with hazardous liquid fire or explosion which may result in personal injury or property damage can occur placer a Tsretaingpresiurcor proces kand Fepaired Handle the displacer with care 1 Support the sensor body key 1 and the torque tube arm key 2 Remove the bolting that holds the wafer body to the process vessel or displacer cage Instruction Manual 249W Sensor December 2012 CAUTION When removing the sensor from a process vessel or displacer cage displacer may remain attached to the displacer rod gbe ted out withthe wafer body key 1 when the wafer body removed I separating the displacer and dsplacerrod Before removing the wafer body remove the coter spring key 10 Be carefu mot to let the dlsplacer sip and drop into the bottom of the process vessel or displacer cage as displacer damage 2 Carefully remove the sensor Ifthe displacer comes out with the sensor be careful not to damage the displacer or bend the stem when setting the sensor down 3 Follow the procedure for replacing the displacer displacer rod assembly cotter spring stem end piece and displacerspud as necessary Replacing the Displacer Cotter Spring Stem End Piece and Displacer Spud The cotter
18. mitter For this information referte EMERSON Process Management 249W Sensor Instruction Manual December 2012 Do not install operate or maintain 249 sensor and the attached controller or transmitter without being fully trained and qualified in valve actuator and accessory installation operation and maintenance To avoid personal Injury or property damage ttis important to carefully read understand and follow all of the contents of this manual Including safety cautions and warnings you have any questions about these instructions contact your Emerson Process Management sales office before proceeding Description The 2490 sensor is designed to measure liquid level interface level or density specific gravity inside a process vessel Atorque tube assembly figure 2 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 itat the other end Figure 2 Typical Cageless Displacer 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 torque tube to remain at atmospheric pressure thus eliminating packing and the disadvantages of packing friction Th
19. prid Nether meson Emerson Process Management nor any of thei affliated assumes for the selection use or maintenance tary predict for proper section use and maintenance ofany product ems soleh wi the purchaser and ead St fiber ind PEDUUE owed by one of the companies Emerson Process Mangement business urt of Emerson Et Co Emerson Process Morne ese de Erenn fogo estes dace Ca mak athe ape Y The contents of th iban are present orans purposes orly and whe every efor has een madeto ensure their accuracy they arent swore gui aters egardis or veraces ese or e and conditore We ne D te besis atin tne winaa netee Martone SERA tom Dubai Unte bates see EMERSON Process Management conent manatunatu M grad
20. ricating the cage maintain a minimum clearance o 1 4 inch between the displacer and the cage wall Dirty or viscous fluids may require a larger clearance Provide sufficient cage length below the displacer to ensure thatthe displacer does not hit the bottom of the cage The A dimension should be sufficient to permit adequate clearance for Installation and to allow access to isolation valves etc When installing the cage It must be vertically plumb so that the displacer does not strike the side of the cage As shown in figure 5 mount the cage by running equalizing ines between the cage connections and the vessel shutoff or hand valve with a 1 1 2 inch diameter or larger port should be installed in each of the equalizing lines Also install a drain between the cage and shutoff or hand valve whenever the Bottom cage line has a low point On fluid or interface level applications position the dsplacer cage so that the cage center is as close as possible othe center of the fluid level or interface level range being measured Aso consider installing a gauge glass onthe vessel or on the displacer cage Mounting the Sensor on the Process Vessel or Displacer Cage CAUTION inserting the displacerintothe vessel or displacer cage before attaching to the displacer rod provide a means of Supporting the deplacer to prevent a vense or eaae and damage Install the sensor wafer body on the vessel or displac
21. rmation Supplement to 249 Sensor Instruction Manuals 0103220X012 Torque Tube Identification Supplement to 249 Sensor Instruction Manuals D103283X012 All documents are available from your Emerson Process Management sales office Also visit our website at ww Fisher com Parts Ordering Whenever corresponding with your Emerson Process Management sales office about this equipment always mention the sensor serial number Each sensors assigned a serial number which is stamped on a nameplate Key 21 attached tothe torque tube arm This same number also appears on the controller transmitter nameplate when a complete controller transmitter sensor unitis shipped from the factory When ordering a replacement part be sure to include the Ti character part number from the following parts Ist 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 vod your warranty might adversely affect the performance of the instrument and could cause personal Injury or property damage Determining Displacer Stem Length When ordering displacer stem determine the displacer stem length from the G dimension in figure 6 for cage styles 3and 4 For cage styles 1 and 2 the G dimensions typically 0 because the displacer is generally suspended from the Tod and dri
22. spring key 10 the ballon the displacer rod driver assembly key S and the stem end piece or displacer stem connector key 6 may be ether too wom for a secure connection or so clogged or corroded that the displacer does not pivot properly Replace these parts as necessary CAUTION Ifthe displacer isto be disconnected from the displacer rod before being removed from the process vessel or displacer provide a suitable means of supporting the daplacer to prevent rom dropping into the vessel or cage and being 1 After following the proper procedure to remove the sensor and the displacer from the process vessel or displacer age move the sensor assembly to a sultable maintenance area Support the assembly to avoid damage to the displacer displacer stem displacer rod driver assembly and associated parts 2 To help support the displacer install the stem and stem end piece or a threaded rod into the 1 4 inch 28 UNF threaded hole in the displacer spud or stem connector 3 Reach the cotter spring displacer spud ball end of displacer od driver assembly stem end piece or displacer stem connector as follows Remove 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 Retum the displacer or stem end piece to the displacer rodfdriver assembly Install the cotter spring 5 Ins
23. tall the sensor and controller transmitter Calibrate the controllerftransmitter 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 5 may be either too worn for a secure connection or so corroded thatthe displacer does not pivot properly Replace the displacer roddriver assembly if necessary 249W Sensor Instruction Manual December 2012 m CAUTION Ifthe displace isto be disconnected from the displacer rod driver assembly before being removed from the process vessel or displacer cage provide a suitable means of supporting the displacer to prevent it from dropping into the vessel or cage nd being damaged 1 After following the proper procedure to remove the sensor and the displacer from the process vessel or displacer age move the sensor assembly to a sultable maintenance area 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 4 Then remove the hex nuts key 20 that hold the torque tube arm key 2 to the wafer body key 1 Separate the torque tube arm from the wafer body 3 Remove the nuts key 18 and retaining flange key 14 at the end of the torque tube arm 4 Remove the positioning plate key 15 by freeing its two lugs The vertical its into a hole in the ange of th
24. ver assembly with no displacer stem required The stem length will be the dimension rounded to the nearest 1 2 inch increment For example dimension Gis 12 83 inches round ito 12 inches stem length of 125 nches f dimension Gis 844 nches ound ito 9 5 Inches a stem length of 9 5 inches Stem lengths can be adjusted approximately 40 25 inches fora more exact dimension Stems are available in increments from 2 to 54 inches 249W Sensor Instruction Manual December 2012 Figure 14 Fisher 249W Sensor Construction Instruction Manual 249W Sensor bens pores p tacit m po E Ec E ES p pm E mE Mensa p oce pom pc E Ed pd met poo p Ee E Sean Enel EM E arisen sie ie poem pu rr iat rcu Eons E enn terse E E E m Ec Ws E E er p ar E nna E e poem E E n rL ss E e ed m ps E verge E ie MEE teta per 249W Sensor Instruction Manual December 212 oin My Tete Doom pes arga 2d DET Task IS Gist prac d For SA 193 pan bating NES ater noar Nm prece prune 15 ats 18 Gomera piedad SESS Warte reg NA d w Fen
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