Mounting and Operating Instructions

EB 8359-2 EN Edition April 2014

Type 4763 Electropneumatic Positioner

Type 4763 Electropneumatic Positioner

Definition of signal words

DANGER!Hazardous situations which, if not avoided, will result in death or seri-ous injury

WARNING!Hazardous situations which, if not avoided, could result in death or seri-ous injury

NOTICEProperty damage message or mal-function

Note:Additional information

Tip:Recommended action

2 EB 8359-2 EN

Contents

EB 8359-2 EN 3

1 General safety instructions .............................................................................52 Article code ...................................................................................................63 Technical data ...............................................................................................73.1 Explosionprotectioncertificates .......................................................................94 Design and principle of operation ................................................................105 Attachment .................................................................................................125.1 Attachmenttovalvewithcastyoke ................................................................125.2 Attachmenttovalvewithrod-typeyoke ..........................................................125.3 Housingcover .............................................................................................126 Connections ................................................................................................146.1 Electricalconnections ...................................................................................146.2 Pneumaticconnections..................................................................................156.3 Pressuregauge ............................................................................................156.4 Supplypressure ...........................................................................................167 Operation ...................................................................................................177.1 Assignmentofthepositionerandtheactuator ................................................177.1.1 Determiningandchangingtheoperatingdirection .........................................187.2 Startingpointandreferencevariable .............................................................207.3 Adjustmentaftermountingthepositioneronthevalve .....................................207.3.1 Settingtheairdelivery(volumerestrictionQ)andproportionalbandXp ..........207.3.2 Settingforactuatorwithfail-safeaction“stemextends” ...................................227.3.3 Settingforactuatorwithfail-safeaction“stemretracts” ...................................227.4 Exchangingtherangespring ........................................................................238 Converting the electropneumatic into a pneumatic positioner ........................249 Servicing explosion-protected devices ..........................................................2610 Maintenance, calibration and work on equipment ........................................2711 Accessories and mounting parts ...................................................................2812 Dimensions in mm .......................................................................................29

EB 8359-2 EN 5

General safety instructions

1 General safety instructionsForyourownsafety,followtheseinstructionsconcerningthemounting,startupandopera-tionofthepositioner: − Thepositioneristobemounted,starteduporoperatedonlybytrainedandexperiencedpersonnelfamiliarwiththeproduct.Accordingtothesemountingandoperatinginstructions,trainedpersonnelisreferredtoasindividualswhoareabletojudgetheworktheyareassignedtoandrecognizepossi-bledangersduetotheirspecializedtraining,theirknowledgeandexperienceaswellastheirknowledgeoftheapplicablestandards.

− Explosion-protectedversionsofthispositioneraretobeoperatedonlybypersonnelwhohasundergonespecialtrainingorinstructionsorwhoisauthorizedtoworkonexplo-sion-protecteddevicesinhazardousareas.

− Anyhazardsthatcouldbecausedinthevalvebytheprocessmedium,thesignalpres-sureorbymovingpartsaretobepreventedbytakingappropriateprecautions.

− Ifinadmissiblemotionsorforcesareproducedinthepneumaticactuatorasaresultofthesupplypressurelevel,itmustberestrictedusingasuitablesupplypressurereducingstation.

− Propershippingandstorageareassumed.

Note:Devices with a CE marking fulfill the requirements of the Directives 2014/34/EU and 2014/30/EU. The Declaration of Conformity is available on request.

6 EB 8359-2 EN

Article code

2 Article codeElectropneumatic positioners Type 4763- x 1 x 0 0 x x x x 0 x 0 x x 0Explosion protection

Without 0 2/7

ExII2GExiaIICT6GbaccordingtoATEX 1

CSA/FMintrinsicallysafe/nonincendive 3

ExII3GExnAIIT6Gc/ExicIICT6GcforZone2acc.toATEX 8 2/7

Spring

Spring1,travel=15mm 1

Spring2,travel=30mm,splitrange15mm 2

Spring3,travel=60mm,splitrange30mm 3

Pneumaticconnections

ISO 228/1 G ¼ 1

¼-18NPT 3

Electricalconnection(cablegland)

M20x1.5blue(plastic) 1

M20x1.5black(plastic) 2

M20x1.5(nickel-platedbrass) 7 2

i/pconverters

Type6109 1

Type6112 2

Referencevariable

4to20mA 0

0to20mA 2 2

1to 5mA 2 3

Temperaturerange

Standard 0

Lowtemperaturedownto–45°C 2 2

Specialversion

Without 0 0 0

Foroxygen1) 0/1 0 1 6

GOSTcertificate 8 2 0 1 0

1) Specialversionsuitableforoxygenuptomaximum+60 °C (accordingtoAIRLIQUIDEtestreportno.2014/R171a1)

EB 8359-2 EN 7

Technical data

3 Technical data

Controlledvariable(travelrange) 7.5to60 mm,withleverextension:7.5to90 mm

Referencevariable1)Split-range0to50 %or 50to100 % referencevariablespan (upto50 mmtravel)

4to20 mA(Ex), Ri=250 Ω2)

4to20 mA(withoutexplosionprotection), Ri=200 Ω2)

0to20 mA, Ri=200 Ω2)

1to5mA, Ri=880 Ω2)

Rangespring SeeTable1onpage 21

Supplyair 1.4to6bar(20to90psi)Airqualityacc.toISO8573-1:Max.particlesizeanddensity:Class4Oilcontent:Class3·Pressuredewpoint:Class3

Signalpressurepst(output) Max.0to6.0 bar(0to90 psi)

Characteristic Linearcharacteristic·Deviationfromcharacteristicaccordingtoterminalpointmethod:≤1.5 %

Hysteresis <0.5 %

Sensitivity <0.1 %

Operatingdirection Reversible

ProportionalbandXp(at1.4barsupplyair)

1to3.0 %withspring11to2.0 %withspring21to1.5 %withspring3

Airconsumptioninsteadystate(Xp=1 %)

With1.4 barsupplyair:0.19mn³/hWith6 barsupplyair:0.5mn³/h

Air output AtΔp1.4 bar:3.0mn³/hAtΔp6 bar:8.5mn³/h

TransittimewithType3271Actuator,“stemextends”

240 cm²≤1.8 s 350 cm²≤2.5 s 700 cm²≤10.0 s

Perm.ambienttemperature3),4) With Type 6109 i/p Converter:–20to+70 °C–35to+70 °C(metalcablegland)

With Type 6112 i/p Converter:–20to+80 °C–40to+80 °C(metalcablegland)–45to+80 °C(specialversion)

8 EB 8359-2 EN

Technical data

Influences Temperature:<0.03 %/1 KSupplyair:<0.3 %/0.1 barVibrations:<2 %between10upto150 Hzand4 gVariablepositionwhenturnedby180°:<3.5 %

Degreeofprotection IP54·Ventingovercheckvalve(1790-7408):IP65

Compliance ·

Electromagneticcompatibility ComplyingwithEN61000-6-2,EN61000-6-3andEN61326-1

Weight Approx.1.2kg

Materials Housing Die-castaluminum,chromatedandplasticcoated

Externalparts Stainlesssteel

1) ThedatalistedinthecertificateofconformityappliestotheversionwithtypeofprotectionExiaIIC.2) Ri=Coilresistance(atapprox.20 °C)±7 %tolerance3) Observethelimitsinthecertificateofconformityforexplosion-protectedversions.4) Withspecialversionsuitableforoxygenuptomaximum+60 °C

EB 8359-2 EN 9

Technical data

3.1 Explosion protection certificates

Type Certification Type of protection

4763-1

Number RUCDE.08.00697

1Ex iaIICT6/T5/T4GbXDate 15.12.2014

Validuntil 2019-12-14

4763-1

Number PTB 02ATEX2078

II2GEx iaIICT6GbDatum 2002-07-19ECtypeexaminationcertificate

4763-3 ®Number 1607873 Ex iaIICT6;ClassI,Zone0;

ClassI,II,Div.1,GroupsA,B,C,D,E,F,G;ClassI,II,Div.2,GroupsA,B,C,D,E,F,G;Date 2005-09-16

4763-3

Number 3020228 ClassI,Zone0AEx iaIICClassI,II,III;Div.1,GroupsA,B,C,D,E,F,GClassI,Div.2,GroupsA,B,C,D;ClassII,Div,2GroupsF,G;ClassIII;

Date 2005-02-28

4763-7 JISNumber TC14411

Ex iaIICT6Date 2015-02-09

Validuntil 2018-03-01

4763-8

Number RUCDE.08.00697

2ExnAIICT6/T5/T4GcXDate 2014-12-15

Validuntil 2019-12-14

4763-8

Number PTB 03ATEX2183X

II3GExnAicIICT6GcDate 2003-09-30Statementofconformity

10 EB 8359-2 EN

Design and principle of operation

4 Design and principle of oper-ation

Theelectropneumaticpositionerisusedtoassignthevalveposition(controlledvariable)totheinputsignal(referencevariable).Thepositionercomparesthecontrolsignalofacontrolsystemtothetravelofthecontrolvalveandissuesasignalpressure(outputvariable)forthepneumaticactuator.Thepositionerconsistsofanelectropneumat-icconverterunit(21)andapneumaticunitequippedwithalever(1),shaft(1,1)andrangespringaswellasthepneumaticcon-trolsystemwithnozzle,flapperplateandbooster.TheDCcontrolsignal,e.g.4to20 mA,issuedbythecontroller,istransmit-tedtotheelectropneumaticconverterunit(i/pconverter)whereitisconvertedintoaproportionalpressuresignalpe.Anychangeoftheinputcurrentsignalcaus-esaproportionalchangeoftheairpressurepefedtothepneumaticcontrolsystem.Theairpressurepeproducesaforcewhichactsonthesurfaceofthemeasuringdia-phragm(8)andiscomparedtotheforceoftherangespring(6).Themotionofthemeasuringdiaphragm(8)istransferredtotheflapperplate(10.2)overthefeelerpin(9.1),andthenozzle(10.1)releasespressure.Anychangeofeithertheairpressurepeorthevalvestempositioncausesthepressuretochangeinthebooster(12)connecteddownstreamofthenozzle.Thesignalpressurepstwhichisreleasedcausestheplugstemtoassumeapositionbasedonthereferencevariable.

TheadjustablevolumerestrictionQ(14)andXp(gain)restriction(13)areusedtoopti-mizethecontrolloopofthepositioner.Therangespring(6),whichcanbeex-changed,isassignedtoboththeratedvalvetravelandthespanofthereferencevariable.

Legend for Fig. 1 and Fig. 21 Leverforvalvetravel1.1 Shaft2 Pin2.1 Nut3 Sleeve4 Zeropointadjustment5 Fasteningscrew6 Rangespring6.1 Bracket7 Fasteningscrew8 Measuringdiaphragm9 Diaphragmplate9.1 Feeler pin10 Nozzleblock10.1 Nozzle10.2 Flapperplate11 Coverplate12 Booster13 Xprestriction14 VolumerestrictionQ15 Holeforfasteningscrew20 Plate21 i/pconverter

EB 8359-2 EN 11

Design and principle of operation

4

21 14 13 10.2 7

1

15

8

5 6.1 6 3

Fig. 1: Positioner with cover removed

pstOutput

36

pe

Supply9

21

1.1

45

6

89

9.110.2

1010.1 6

89

9.1

10.2

10.1

10

11

i ip

12

1413

1 2 2.1 20

Travel

Arrangementofnozzle/flapperplateforreverse<>operatingdirection

Fig. 2: Functional diagram

12 EB 8359-2 EN

Attachment

5 AttachmentToattachthepositionertovalveswithcastyokesaccordingtoIEC 60534-6(NAMURrib),mountingparts(orderno.1400-5745)areused.Forvalveswithrod-typeyokes,themountingkit(orderno.1400-5745)andad-ditionallythemountingkit(orderno.1400-5342)arenecessary(seealsoaccessoriesinsection 11onpage 28).Sincethepositionercanbeattachedonei-thersideofthevalve,thephysicallocation(leftorrightattachment)shouldbedeter-minedbeforeactualattachment.

Î SeeFig. 6toFig. 9onpage 17.

5.1 Attachment to valve with cast yoke

1. Fastentheplate(20)tothestemconnec-tor(22)ofthevalveusingthescrews(21).

2. Unscrewthepositionercover,andsecurethepositionertothevalveyokeusingthefasteningscrew(15).TheO-ringinclud-edinthemountingkitisnotrequiredforthispositioner.Makesurethatthepin(2)isinsertedthroughthewirestrapand,asaresult,clampedagainsttheplate(20).

5.2 Attachment to valve with rod-type yoke

1. Fastentheplate(20),off-centered,tothetravelindicator(24)oftheplugstem(23)usingthescrews(21).

2. Placeboththesupport(28)andtheclampingplate(26)ontherod(27)andlightlyfasten.Movethesupportuntilboththecenteroftheplate(20)andthesup-port(28)arealignedwhenthevalveisathalfofthevalvetravel.

3. Fastentightthesupportandtheclamp-ingplate.

4. Mountthepositionertothesupportusingthefasteningscrew(15).Makesurethatthepin(2)isinsertedthroughthewirestrapand,asaresult,clampedagainsttheplate(20).

5.3 Housing coverAfterattachingthepositioner,makesurethattheventplugofthehousingcoverfacesdownwardwhenthevalveisinstalled.

Legend for Fig. 3 and Fig. 4:1 Lever2 Pin2.1 Nut15 Fasteningscrew20 Plate21 Screw22 Stemconnector23 Plugstem24 Travelindicator26 Clampingplate27 Rod(pillar)28 Support

EB 8359-2 EN 13

Attachment

15 1 20 2 2.1 21 22 23

Fig. 3: Attachment to valves with cast yokes (NAMUR rib)

15 1 28 27 26 20 2.1 2 21 24 23

Fig. 4: Attachment to valves with rod-type yokes

14 EB 8359-2 EN

Connections

6 Connections

6.1 Electrical connections

DANGER!For electrical installation, observe the relevant electrotechnical regulations and the accident prevention regula-tions that apply in the country of use. In Germany, these are the VDE regu-lations and the accident prevention regulations of the employers’ liability insurance.The following regulations apply to in-stallation in hazardous areas: EN 60079-14: 2008 (VDE 0165, Part 1) Explosive Atmospheres – Electrical Installations Design, Selec-tion and Erection.

NOTICEAdhere to the terminal assignment! Switching the assignment of the elec-trical terminals may cause the explo-sion protection to become ineffective. Do not loosen enameled screws in or on the housing. The maximum per-missible values specified in the EC type examination certificates apply when interconnecting intrinsically safe electrical equipment (Ui or Uo, li or Io, Pi or Po, Ci or Co and Li or Lo).

Selecting cables and wires:Observeclause 12ofEN 60079-14:2008(VDE 0165,Part 1)forinstallationofthein-trinsicallysafecircuits.Clause 12.2.2.7ap-plieswhenrunningmulti-corecablesandwireswithmorethanoneintrinsicallysafecircuit.Theradialthicknessoftheinsulationofaconductorforcommoninsulatingmaterials(e.g.polyethylene)mustnotbesmallerthan0.2 mm.Thediameterofanindividualwireinafine-strandedconductormustnotbesmallerthan0.1 mm.Protecttheconductorendsagainstsplicing,e.g.byusingwire-endferrules.Whentwoseparatecablesorwiresareusedforconnection,anadditionalcableglandcanbeinstalled.Sealcableentriesleftun-usedwithplugs.Fitequipmentusedinambi-enttemperaturesbelow–20 °Cwithmetalcableglands.

EB 8359-2 EN 15

Connections

Equipment for use in zone 2/zone 22:InequipmentoperatedaccordingtotypeofprotectionEx nAII(non-sparkingequipment)accordingtoEN 60079-15: 2003,circuitsmaybeconnected,interruptedorswitchedwhileenergizedonlyduringinstallation,maintenanceorrepair.Guidethewiresforthereferencevariableoverthecableglandtotheterminals11(+)and12(–)locatedinthehousing.Thegroundconnectioncanbeconnectedin-sideoroutsideofthepositionerhousing.

Accessories for electrical connections Î Seesection11onpage28

Input controlsignal 0/4to20 mA

Fig. 5: Electrical connection

6.2 Pneumatic connectionsThepneumaticconnectionsareoptionallydesignedasaborewith¼ NPTorISO 288/1-G ¼thread.Customaryfittingsformetalorcoppertubingorplastichosescanbeused.

NOTICERisk of malfunction due to failure to comply with required air quality. − Only use supply air that is dry and free of oil and dust. − Read the maintenance instructions for upstream pressure reducing sta-tions. − Blow through all air pipes and hos-es thoroughly before connecting them.

6.3 Pressure gaugeTomonitorthepositioner,werecommendin-stallingpressuregaugesforthesupplyairandsignalpressure.Therequiredpartsarelistedasaccessoriesinsection 11onpage 28.

16 EB 8359-2 EN

Connections

6.4 Supply pressureTherequiredsupplyairpressuredependsonthebenchrangeandtheactuator'soperatingdirection(fail-safeaction).Thebenchrangeiswrittenonthenameplateeitherasthespringrangeorsignalpressurerange.TheoperatingdirectionismarkedFA or FE,orbyasymbol.

Actuator stem extends (FA)Fail-close(forglobeandanglevalves)Requiredsupplypressure=Upperbenchrangevalue+0.2bar,minimum1.4bar

Actuator stem retracts (FE)Fail-open(forglobeandanglevalves)Fortight-closingvalves,themaximumsignalpressure pstmaxisroughlyestimatedasfol-lows:

pstmax = F+ d²·π·∆p [bar]4·A

d = Seatdiameter[cm]∆p = Differentialpressureacrossthevalve

[bar]A = Actuatordiaphragmarea[cm²]F = Upperbenchrangevalue[bar]

If there are no specifications, calculate as follows:Requiredsupplypressure=Upperbenchrangevalue+1 bar

Thepositioneroutputpressureisroutedtothetoporbottomdiaphragmcaseoftheac-tuatorasshowninFig. 6toFig. 9.

EB 8359-2 EN 17

Operation

7 Operation7.1 Assignment of the posi-

tioner and the actuatorArrangementoftheactuator,themountingpositionofthepositioner,thereferencevari-ableandtheoperatingdirection:

Î SeeFig. 6toFig. 9

Whenanysubsequentchangesaremade,e.g.reversingtheoperatingdirectionofthepositionercontrollooporchangingtheactu-atorfail-safeactionfrom“actuatorstemex-tends”to“actuatorstemretracts”orvicever-sa,thepositioner'smountingpositionmustbechangedaccordingly.

Actuator stem extends (FA)

1

20

pstw

120

pst

w

Lever(1)ontopofplate(20) Plate(20)ontopoflever(1)

Fig. 6: Operating direction << Left attachment Fig. 7: Operating direction <> Right attachment

Actuator stem retracts (FE)

pst

w

pst

w

Fig. 8: Operating direction << Right attachment

Fig. 9: Operating direction <> Left attachment

18 EB 8359-2 EN

Operation

7.1.1 Determining and changing the operating direction

Foranincreasinginputsignal(referencevariable),thesignalpressurepstcaneitherbeincreasing(directaction<<)ordecreas-ing(reverseaction<>).Similarly,asthereferencevariabledecreas-es,thesignalpressurecaneitherdecrease(directaction<<)orincrease(reverseaction<>).Ontheflapperplate,theoperatingdirectionisindicatedbysymbols(direct<<,reverse<>).Dependingonthepositionoftheflap-perplate,theadjustedoperatingdirectionandtheassociatedsymbolbecomevisible.Iftherequiredoperatingdirectiondoesnotcorrespondtothevisiblesymbol,oriftheoperatingdirectionistobechanged,pro-ceedasfollows:1. Unscrewbothscrewsonthecoverplate,

andliftoffthenozzleblockalongwiththecoverplate.

2. Reinstallthenozzleblockturned180°to-getherwiththecoverplate,andrefasten.

MakesurethatthenozzleblockandflapperplatearecorrectlylocatedaboveorbelowthefeelerpinasshowninFig. 10.Iftheoperatingdirectionistobechangedaftertheinitiallydeterminedarrangementofpositionerandactuator,notethattheposi-tionermustbemountedinadifferentloca-tionandthenozzleblockmustbeturned.Makesurethelocationofthelever(1)andtheplate(20),"leverontopofplate"orre-

versed"plateontopoflever"iscorrect(Fig. 6toFig. 9).

EB 8359-2 EN 19

Operation

Operatingdirectionincreasing/increasing(direct<<) feelerpinontopofflapperplate

Operatingdirectionincreasing/decreasing(reverse<>) flapperplateontopoffeelerpin

Rangespring

Feeler pin

Coverplate

Nozzleblock

Marking Flapper

Fig. 10: Position of nozzle block, cover plate removed

100%

0%4 20mAReferencevariable

Inputsignal

Open

Travel

Closed

100%

0%4 12 20mA

Deadband

Valve2 Valve1

Open

Travel

Closed

Fig. 11: Normal operation Fig. 12: Split-range operation, two valves operating in opposing directions

20 EB 8359-2 EN

Operation

7.2 Starting point and refer-ence variable

TheattachedleverandtheinstalledrangespringofthepositionerareassignedtothevaluesofratedvalvetravelandthereferencevariableasinTable1.Innormaloperation,thereferencevariablespanis100 %=16 mA.Asmallerspanof,forexample,50 %=8 mAisonlyrequiredforsplit-rangeoperation(Fig. 12).Thespancanbechangedbyexchangingtherangespring(section 7.4).Onmakingad-justmentstothepositioner,thetravelmustbeadaptedtothereferencevariableandviceversa.Withareferencevariable,forexample,4to20 mA,thevalvemustmovethroughitsen-tiretravelrangefrom0to100 %.Thestart-ingpointthenis4 mAandtheupperrangevalue20 mA.Insplit-rangeoperation,thecontrolleroutputsignalisusedtocontroltwocontrolvalves,dividingitsuchthatthevalvesmovethroughtheirentiretravelrangeathalftheinputsig-nalrangeeach(e.g.firstvalvesetto4to12 mA,secondvalvesetto12to20 mA).Toavoidoverlapping,allowforadeadbandof±0.5 mAasshowninFig. 12.Thestartingpoint(zero)isadjustedatthescrew(4);thereferencevariablespan,i.e.theupperrangevalue,isadjustedatthepin(2).

7.3 Adjustment after mounting the positioner on the valve

Î Connectanammetertothecontrolsignalinputattheterminals11(+)and12(–).

Î Connectthesupplyairtothesupplyin-put(supply9).

7.3.1 Setting the air delivery (volume restriction Q) and proportional band Xp

1. Closethevolumerestriction(14)asfarastherequiredpositioningspeedper-mits.Checkthepositioningspeedbypushingtherangespring(6)asfaritwillgo.

2. Adjustthereferencevariableattheinputtoapprox.50 %ofitsrange.Then,turnthezeroadjustmentscrew(4)untilthevalveisatapproximately50 %valvetravel.

OnsettingtheXprestriction,observethere-lationshipwiththesupplyairpressureasin-dicatedinFig. 13.ThepresetvalueofXpshouldbeapproximately3 %.3. Checktheplugstem'stendencytooscil-

latebypressingtherangespring(6)brieflyasfarasitwillgo.TheXpvalueistobeadjustedtobeassmallaspossible,withoutconsiderableovershootingoccurring.

Additional points that apply concerning ad-justment:

Î AlwaysadjusttheXprestrictionbeforesettingthestartingpoint.

EB 8359-2 EN 21

Operation

Table 1: Range springs

Rated travel [mm] Min./max. travel [mm] Reference variable (input signal) Range springStandardtravelsforSAMSONvalveswithleverl(40to127 mminlength)

15 7.5 to 15 100 % 50 %

1 2

30 14 to 32 100 % 50 %

2 3

60 30 to 70 100 % 3Furthertravelrangeswithleverlandleverextension(40to200 mminlength)

20 7.5 to 26 100 % 50 %

1 2

40 14 to 50 100 % 50 %

2 3

>60 30 to 90 100 % 3

Î Incaseofazeroshift(e.g.duetoasub-sequentchangeintherestrictionsettingorsupplypressure),checkthezeroset-tingandreadjustit.

Î TheadjustmentrangeoftheXprestric-tionisrestrictedbythepointerandstoptooneturn(Fig. 13).Donotremovethepointer!

Zul. Supply Alim.

Fig. 13: Setting the Xp restriction

Ifthepointerhasbeenremovedunintentionally,aninitialsettingcanbeperformedasfollows:1. Closetherestrictionbyturningitclock-

wiseuntilyoufeelaslightresistance.2. Basedonthisposition,opentherestric-

tiononequarterturn.3. Pressontheplasticringwiththepointer

atthe0°position.4. Settherestrictionintherangebetween

90°and180°.5. SetXpasdescribedinsection 7.3.1.

22 EB 8359-2 EN

Operation

7.3.2 Setting for actuator with fail-safe action “stem ex-tends”

Toensurethatthetotalclosingforceoftheactuatoractsonthevalve,proceedasfol-lows:

Î Withdirectoperatingdirection<<:ad-juststartingpointto4.5 mA(slightlyraised).

Î Withreverseoperatingdirection<>:ad-juststartingpointto19.5 mA(slightlylowered).

Starting point (zero) e.g. 4.5 mA1. Turnthezeroadjustmentscrew(4)until

theplugstemjuststartstomoveoutofitsrestingposition(observetravelindica-tor).

2. Reducetheinputsignalto0 mAandslowlyincreaseitagain.Checkwhethertheplugstemstartstomoveatexactly4.5 mAandcorrect,ifnecessary.

Upper range value (span) e.g. 20 mA3. Oncethestartingpointhasbeenset,in-

creasetheinputsignal.Atexactly20 mA,theplugstemmuststandstill,havingmovedthrough100 %travel(watchthetravelindicatoratthevalve).Iftheupperrangevalueisincorrect,movethepin(2)asfollowstocorrectit:

4. MovetowardsLeverend à ToincreasethetravelFulcrum à Toreducethetravel

Aftercorrectingtheinputsignal,re-ad-justzero.Thenchecktheupperrangevalueagain.

Repeatthecorrectionprocedureuntilbothvaluesarecorrect.

7.3.3 Setting for actuator with fail-safe action “stem re-tracts”

Whenusinganactuatorwith"actuatorstemretracts"fail-safeaction,thediaphragmchambermustbepressurizedwithasignalpressurethatishighenoughtotightlyclosethevalveagainsttheupstreampressureintheplant.

Î Operatingdirection<<:Upperrangevalueofreferencevariable20 mA

Î Operatingdirection<>:Lowerrangeval-ueofreferencevariable4 mA

Therequiredsignalpressureiseitherindicat-edonthepositionerlabelortherequiredsupplypressurecanberoughlycalculatedasdescribedinsection 6.4.

Starting point e.g. 20 mA1. Settheinputsignalattheammeterto

20 mA.Turnthezeroadjustmentscrew(4)untiltheplugstemjuststartstomoveoutofitsinitialposition.

2. Increasetheinputsignalandslowlyre-duceitagainto20 mA.Checkwhethertheplugstemstartstomoveatexactly20 mA.Correctanydeviationatthezeroadjust-mentscrew(4).Turningitcounterclock-

EB 8359-2 EN 23

Operation

wisecausestheplugstemtomovefromitsendpositionearlier;turningitclock-wisecausesittomovefromitsendposi-tionlater.

Upper range value (span) e.g. 4 mA3. Oncethestartingpointhasbeenset,in-

creasetheinputsignalto4 mAattheammeter.Atexactly4 mA,theplugstemmuststandstill,havingmovedthrough100 %travel(watchthetravelindicatoratthevalve).

4. Iftheupperrangevalueisincorrect,movethepin(2)tocorrectit.Readjust20 mAandturnthezeroadjustmentscrew(4)untilthepressuregaugeindi-catestherequired signal pressure.Ifnopressuregaugehasbeeninstalled,setthestartingpointto19.5 mAinstead.

7.4 Exchanging the range spring

Iftherangeistobealteredorchangedtosplit-rangeoperation,replacetherangespringasshowninFig. 1onpage 11asfollows:1. Unscrewscrew(7)ontherangespring.

Undohexagonsocketscrew(5)andpulloutthelevertogetherwithshaft.

2. Exchangerangespring.Slideleverwithshaftthroughsleeve(3),positionerhous-ingandbracket(6.1).

3. Securerangespringwiththescrew(7).4. Movebracketandshaftuntilthescrew

(5)sitsontheflattenedpartoftheshaft.Tightenscrew(5).Allowforaplayof0.05to0.15 mmbetweenthelever(1)andthesleeve(3)aswellasbetweentherangespring(6)andthepositionerhous-ing.

24 EB 8359-2 EN

Converting the electropneumatic into a pneumatic positioner

8 Converting the electropneu-matic into a pneumatic posi-tioner

Theelectropneumaticpositionercanbecon-vertedintoaType 4765PneumaticPosition-erwithaconversionkit.

Note:The version suitable for oxygen of the Type 4763 Pneumatic Positioner can-not be converted to form a Type 4765 Electropneumatic Position-er.

Î Requiredconversionkits:seeTable21. Unscrewfasteningscrewsandliftthei/p

convertertogetherwiththeprintedcircuitboardoutofthepositionerhousing.

2. Unthreadcablegland(1).Plugonhose(5)andscrewtheconnectingnipple(4)oftheconversionkittightlyonthehous-ing.

3. Insertsealingelement(7)intoconnectingplate(6)andfastenittightintothehous-ing.

4. Pushthefreeendofthehoseontotheconnectingplate(6).

Note:For details on the converted Type 4765 Positioner, refer to Mount-ing and Operating Instructions u EB 8359-1 EN.

Legend for Fig. 141 Cablegland2 Printedcircuitboard3 i/pconverters4 Connectingnipple5 Hose6 Connectingplate7 Sealingelement

EB 8359-2 EN 25

Converting the electropneumatic into a pneumatic positioner

1 3 2 4 5 7 6

38Fig. 14: Converting the positioner

Table 2: Conversion kits

Requiredconversionkituptodeviceindex.02.

ForconnectionwithGthread Orderno.1400-6724

ForconnectionwithNPTthread Orderno.1400-6725

Requiredconversionkitfordeviceindex.03andhigher.

ForconnectionwithGthread Orderno.1400-6795

ForconnectionwithNPTthread Orderno.1400-6796

26 EB 8359-2 EN

Servicing explosion-protected devices

9 Servicing explosion-protected devicesIfapartofthedeviceonwhichtheexplosionprotectionisbasedneedstobeserviced,thedevicemustnotbeputbackintooperationuntilaqualifiedinspectorhasassesseditaccord-ingtoexplosionprotectionrequirements,hasissuedaninspectioncertificateorgiventhede-viceamarkofconformity.Inspectionbyaqualifiedinspectorisnotrequiredifthemanufacturerperformsaroutinetestonthedevicebeforeputtingitbackintooperation.Documentthepassingoftheroutinetestbyattachingamarkofconformitytothedevice.Replaceexplosion-protectedcomponentsonlybyoriginal,routine-testedcomponentsprovid-edbythemanufacturer.Devices that have already been used outside hazardous areas and are intended for future use inside hazardous areas must comply with the safety requirements placed on serviced devices. Before being operated inside hazardous areas, test the devices according to the specifications for servicing explosion-protected devices.

EB 8359-2 EN 27

Maintenance, calibration and work on equipment

10 Maintenance, calibration and work on equipmentInterconnectionwithintrinsicallysafecircuitstocheckorcalibratetheequipmentinsideoroutsidehazardousareasistobeperformedonlywithintrinsicallysafecurrent/voltagecali-bratorsandmeasuringinstrumentstoruleoutanydamagetocomponentsrelevanttoexplo-sion protection.Observethemaximumpermissiblevaluesspecifiedinthecertificatesforintrinsicallysafecir-cuits.

28 EB 8359-2 EN

Accessories and mounting parts

11 Accessories and mounting partsAccessories – Mounting parts Order no.

Rangespring1Rangespring2Rangespring3LeverILeverextensionPressuregaugeattachmentPressuregaugeattachment(copper-free)

1190-07361190-07371190-07381690-64691400-67161400-69501400-6951

MountingunitforvalveswithcastyokeaccordingtoNAMURValveswithrod-typeyokeaccordingtoNAMURfor18to35 mmroddiameter

1400-57451400-5745and1400-5342

Assortmentofsparepartsincludinggasketsanddiaphragms 1400-6792

Assortmentofsparepartsincludinggasket,diaphragmsandpneu-maticparts(forpositionerswithdeviceindex.02andhigher)

1402-0040

UpgradetodegreeofprotectionIP 65:Ventingovercheckvalve 1790-7408

Accessories for electrical connections Order no.

BlackcableglandM20x1.5BrowncableglandM20x1.5

1400-69851400-6986

AdapterM20x1.5to½NPT,powder-coatedaluminum: 0310-2149

EB 8359-2 EN 29

Dimensions in mm

12 Dimensions in mm

157

49.5

15

2.5

38

.

.

.

UseableleverlengthI: 40to127 mm (withleverextension 40to200 mm)Pneumaticconnections: ISO-228/1-G¼

Cablegland:Deviceindex.02and lower:Pg13.5Deviceindex.03and higher:M20x1.5

G 1/8 connection

forhousingwith Gthread or 1/8NPTconnection forhousingwith NPTthread

30 EB 8359-2 EN

EB 8359-2 EN 31

32 EB 8359-2 EN

EB 8359-2 EN 33

34 EB 8359-2 EN

EB 8359-2 EN 35

36 EB 8359-2 EN

EB 8359-2 EN 37

38 EB 8359-2 EN

EB 8359-2 EN 39

SAMSON AG · MESS- UND REGELTECHNIKWeismüllerstraße 3 · 60314 Frankfurt am Main, GermanyPhone: +49 69 4009-0 · Fax: +49 69 4009-1507samson@samson.de · www.samson.de EB 8359-2 EN 20

16-05-10·English