Samson 4763 Service manual

Mounting and
Operating Instructions
EB 8359-2 EN
Edition April 2014
Type 4763 Electropneumatic Positioner
Type 4763 Electropneumatic Positioner

Denition 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
NOTICE
Property 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.............................................................................5
2 Article code...................................................................................................6
3 Technical data...............................................................................................7
3.1 Explosionprotectioncerticates.......................................................................9
4 Design and principle of operation ................................................................10
5 Attachment .................................................................................................12
5.1 Attachmenttovalvewithcastyoke ................................................................12
5.2 Attachmenttovalvewithrod-typeyoke..........................................................12
5.3 Housingcover .............................................................................................12
6 Connections ................................................................................................14
6.1 Electricalconnections ...................................................................................14
6.2 Pneumaticconnections..................................................................................15
6.3 Pressuregauge ............................................................................................15
6.4 Supplypressure ...........................................................................................16
7 Operation...................................................................................................17
7.1 Assignmentofthepositionerandtheactuator ................................................17
7.1.1 Determiningandchangingtheoperatingdirection .........................................18
7.2 Startingpointandreferencevariable.............................................................20
7.3 Adjustmentaftermountingthepositioneronthevalve.....................................20
7.3.1 Settingtheairdelivery(volumerestrictionQ)andproportionalbandXp ..........20
7.3.2 Settingforactuatorwithfail-safeaction“stemextends”...................................22
7.3.3 Settingforactuatorwithfail-safeaction“stemretracts” ...................................22
7.4 Exchangingtherangespring ........................................................................23
8 Converting the electropneumatic into a pneumatic positioner ........................24
9 Servicing explosion-protected devices ..........................................................26
10 Maintenance, calibration and work on equipment ........................................27
11 Accessories and mounting parts...................................................................28
12 Dimensions in mm.......................................................................................29

EB 8359-2 EN 5
General safety instructions
1 General safety instructions
Foryourownsafety,followtheseinstructionsconcerningthemounting,startupandopera-
tionofthepositioner:
−Thepositioneristobemounted,starteduporoperatedonlybytrainedandexperienced
personnelfamiliarwiththeproduct.
Accordingtothesemountingandoperatinginstructions,trainedpersonnelisreferredto
asindividualswhoareabletojudgetheworktheyareassignedtoandrecognizepossi-
bledangersduetotheirspecializedtraining,theirknowledgeandexperienceaswellas
theirknowledgeoftheapplicablestandards.
−Explosion-protectedversionsofthispositioneraretobeoperatedonlybypersonnelwho
hasundergonespecialtrainingorinstructionsorwhoisauthorizedtoworkonexplo-
sion-protecteddevicesinhazardousareas.
−Anyhazardsthatcouldbecausedinthevalvebytheprocessmedium,thesignalpres-
sureorbymovingpartsaretobepreventedbytakingappropriateprecautions.
−Ifinadmissiblemotionsorforcesareproducedinthepneumaticactuatorasaresultof
thesupplypressurelevel,itmustberestrictedusingasuitablesupplypressurereducing
station.
−Propershippingandstorageareassumed.
Note:
Devices with a CE marking fulll 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 code
Electropneumatic positioners Type 4763- x 1x0 0 xxxx0x0x x 0
Explosion protection
Without 0 2/7
ExII2GExiaIICT6GbaccordingtoATEX 1
CSA/FMintrinsicallysafe/nonincendive 3
ExII3GExnAIIT6Gc/ExicIICT6GcforZone2acc.toATEX 8 2/7
Spring
Spring1,travel=15mm 1
Spring2,travel=30mm,splitrange15mm 2
Spring3,travel=60mm,splitrange30mm 3
Pneumaticconnections
ISO 228/1 G ¼ 1
¼-18NPT 3
Electricalconnection(cablegland)
M20x1.5blue(plastic) 1
M20x1.5black(plastic) 2
M20x1.5(nickel-platedbrass) 7 2
i/pconverters
Type6109 1
Type6112 2
Referencevariable
4to20mA 0
0to20mA 2 2
1to 5mA 2 3
Temperaturerange
Standard 0
Lowtemperaturedownto–45°C 2 2
Specialversion
Without 000
Foroxygen1) 0/1 0 1 6
GOSTcerticate 8 2 0 1 0
1) Specialversionsuitableforoxygenuptomaximum+60°C
(accordingtoAIRLIQUIDEtestreportno.2014/R171a1)

EB 8359-2 EN 7
Technical data
3 Technical data
Controlledvariable(travelrange) 7.5to60mm,withleverextension:7.5to90mm
Referencevariable1)
Split-range0to50%or
50to100%
referencevariablespan
(upto50mmtravel)
4to20mA(Ex), Ri=250Ω2)
4to20mA(withoutexplosionprotection), Ri=200Ω2)
0to20mA, Ri=200Ω2)
1to5mA, Ri=880Ω2)
Rangespring SeeTable1onpage21
Supplyair 1.4to6bar(20to90psi)
Airqualityacc.toISO8573-1:Max.particlesizeanddensity:
Class4
Oilcontent:Class3·Pressuredewpoint:Class3
Signalpressurepst(output) Max.0to6.0bar(0to90psi)
Characteristic Linearcharacteristic·Deviationfromcharacteristicaccordingto
terminalpointmethod:≤1.5%
Hysteresis <0.5%
Sensitivity <0.1%
Operatingdirection Reversible
ProportionalbandXp(at1.4bar
supplyair)
1to3.0%withspring1
1to2.0%withspring2
1to1.5%withspring3
Airconsumptioninsteadystate
(Xp=1%)
With1.4barsupplyair:0.19mn³/h
With6barsupplyair:0.5mn³/h
Air output AtΔp1.4bar:3.0mn³/h
AtΔp6bar:8.5mn³/h
TransittimewithType3271
Actuator,“stemextends”
240cm²≤1.8s
350cm²≤2.5s
700cm²≤10.0s
Perm.ambienttemperature3),4) With Type 6109 i/p Converter:
–20to+70°C
–35to+70°C(metalcablegland)
With Type 6112 i/p Converter:
–20to+80°C
–40to+80°C(metalcablegland)
–45to+80°C(specialversion)

8 EB 8359-2 EN
Technical data
Inuences Temperature:<0.03%/1K
Supplyair:<0.3%/0.1bar
Vibrations:<2%between10upto150Hzand4g
Variablepositionwhenturnedby180°:<3.5%
Degreeofprotection IP54·Ventingovercheckvalve(1790-7408):IP65
Compliance ·
Electromagneticcompatibility ComplyingwithEN61000-6-2,EN61000-6-3andEN61326-1
Weight Approx.1.2kg
Materials
Housing Die-castaluminum,chromatedandplasticcoated
Externalparts Stainlesssteel
1) ThedatalistedinthecerticateofconformityappliestotheversionwithtypeofprotectionExiaIIC.
2) Ri=Coilresistance(atapprox.20°C)±7%tolerance
3) Observethelimitsinthecerticateofconformityforexplosion-protectedversions.
4) Withspecialversionsuitableforoxygenuptomaximum+60°C

EB 8359-2 EN 9
Technical data
3.1 Explosion protection certicates
Type Certication Type of protection
4763-1
Number RUCDE.08.00697
1ExiaIICT6/T5/T4GbXDate 15.12.2014
Validuntil 2019-12-14
4763-1
Number PTB02ATEX2078
II2GExiaIICT6Gb
Datum 2002-07-19
ECtypeexamination
certicate
4763-3 ®
Number 1607873 ExiaIICT6;ClassI,Zone0;
ClassI,II,Div.1,GroupsA,B,C,D,E,F,G;
ClassI,II,Div.2,GroupsA,B,C,D,E,F,G;
Date 2005-09-16
4763-3
Number 3020228 ClassI,Zone0AExiaIIC
ClassI,II,III;Div.1,GroupsA,B,C,D,E,F,G
ClassI,Div.2,GroupsA,B,C,D;
ClassII,Div,2GroupsF,G;ClassIII;
Date 2005-02-28
4763-7 JIS
Number TC14411
ExiaIICT6Date 2015-02-09
Validuntil 2018-03-01
4763-8
Number RUCDE.08.00697
2ExnAIICT6/T5/T4GcXDate 2014-12-15
Validuntil 2019-12-14
4763-8
Number PTB03ATEX2183X
II3GExnAicIICT6Gc
Date 2003-09-30
Statementof
conformity

10 EB 8359-2 EN
Design and principle of operation
4 Design and principle of oper-
ation
Theelectropneumaticpositionerisusedto
assignthevalveposition(controlledvariable)
totheinputsignal(referencevariable).The
positionercomparesthecontrolsignalofa
controlsystemtothetravelofthecontrol
valveandissuesasignalpressure(output
variable)forthepneumaticactuator.
Thepositionerconsistsofanelectropneumat-
icconverterunit(21)andapneumaticunit
equippedwithalever(1),shaft(1,1)and
rangespringaswellasthepneumaticcon-
trolsystemwithnozzle,apperplateand
booster.TheDCcontrolsignal,e.g.4to
20mA,issuedbythecontroller,istransmit-
tedtotheelectropneumaticconverterunit
(i/pconverter)whereitisconvertedintoa
proportionalpressuresignalpe.
Anychangeoftheinputcurrentsignalcaus-
esaproportionalchangeoftheairpressure
pefedtothepneumaticcontrolsystem.
Theairpressurepeproducesaforcewhich
actsonthesurfaceofthemeasuringdia-
phragm(8)andiscomparedtotheforceof
therangespring(6).
Themotionofthemeasuringdiaphragm(8)
istransferredtotheapperplate(10.2)over
thefeelerpin(9.1),andthenozzle(10.1)
releasespressure.Anychangeofeitherthe
airpressurepeorthevalvestemposition
causesthepressuretochangeinthebooster
(12)connecteddownstreamofthenozzle.
Thesignalpressurepstwhichisreleased
causestheplugstemtoassumeaposition
basedonthereferencevariable.
TheadjustablevolumerestrictionQ(14)and
Xp(gain)restriction(13)areusedtoopti-
mizethecontrolloopofthepositioner.
Therangespring(6),whichcanbeex-
changed,isassignedtoboththeratedvalve
travelandthespanofthereferencevariable.
Legend for Fig.1 and Fig.2
1Leverforvalvetravel
1.1 Shaft
2Pin
2.1 Nut
3Sleeve
4Zeropointadjustment
5Fasteningscrew
6Rangespring
6.1 Bracket
7Fasteningscrew
8Measuringdiaphragm
9Diaphragmplate
9.1 Feeler pin
10 Nozzleblock
10.1 Nozzle
10.2 Flapperplate
11 Coverplate
12 Booster
13 Xprestriction
14 VolumerestrictionQ
15 Holeforfasteningscrew
20 Plate
21 i/pconverter