Spirax Sarco LD377B Series Manuale utente
EXPERTISE SOLUTIONS SUSTAINABILITY
3.887.5275.230 EMM Issue 4 - 2018
© Copyright 2016
Dierential Pressure Transmitter
Series LD377B
Installation and Maintenance Instructions
1. Safety information
2. Introduction
3. Description
4. Operations
5.Conguration
6. Maintenance and
Troubleshooting
7.Marking
8. Data Sheet
23.887.5275.230
3
3.887.5275.230
1. Safety information
Safeoperationoftheseproductscanonlybeguaranteediftheyareproperlyinstalled,commissioned,
usedandmaintainedbyqualiedpersonnel(seeSection1.11 on this document) in compliance
withtheoperatinginstructions.Generalinstallationandsafetyinstructionsforpipeline andplant
construction,aswellastheproperuseoftoolsandsafetyequipmentmustalsobecompliedwith.
1.1 Intended use
The trasmitters object of the present instructions comply with the directive ATEX 2014/34/UE and
arecharacterizedbythefollowingmotodhdsofprotection:
II1/2GExdIICT6Ga/Gb
TheyaresuitableforinstallationinZone1,Zone2.
For connections and installation refer to this manual.
1.2 Access
Ensuresafeaccessandifnecessaryasafeworkingplatform(suitablyguarded)beforeattempting
toworkontheproduct.Arrangesuitableliftinggearifrequired.
1.3 Lighting
Ensureadequatelighting,particularlywheredetailedorintricateworkisrequired.
1.4 Hazardous liquids or gases in the pipeline
Consider what is in the pipeline or what may have been in the pipeline at some previous time.
Consider:ammablematerials,substanceshazardoustohealth,extremesoftemperature.
1.5 Hazardous environment around the product
Consider:explosion risk areas,lack of oxygen(e.g. tanks, pits),dangerous gases, extremesof
temperature,hotsurfaces,rehazard(e.g.duringwelding),excessivenoise,movingmachinery.
1.6 The system
Considertheeectonthecompletesystemoftheworkproposed.Willanyproposedaction(e.g.
closingisolationvalves,electricalisolation)putanyotherpartofthesystemoranypersonnelatrisk?
Dangersmightincludeisolationofventsorprotectivedevicesortherenderingineectiveofcontrols
oralarms.Ensureisolationvalvesareturnedonandoinagradualwaytoavoidsystemshocks.
1.7 Pressure systems
Ensure that any pressure is isolated and safely vented to atmospheric pressure. Consider double
isolation(doubleblockandbleed)andthelockingorlabellingofclosedvalves.Donotassumethat
thesystemhasdepressurisedevenwhenthepressuregaugeindicateszero.
1.8 Temperature
Allowtimefortemperaturetonormaliseafterisolationtoavoiddangerofburns.
1.9 Tools and consumables
Beforestartingworkensurethatyouhavesuitabletoolsand/orconsumablesavailable.Useonly
genuineSpiraxSarcoreplacementparts.
43.887.5275.230
1.10 Protective clothing
Considerwhetheryouand/orothersinthevicinityrequireanyprotectiveclothingtoprotectagainst
thehazardsof,forexample,chemicals,high/lowtemperature,radiation,noise,fallingobjects,and
dangerstoeyesandface.
1.11 Permits to work
All work must be carried out or be supervised by a suitably competent person. Installation and
operatingpersonnelshouldbetrainedinthecorrectuseoftheproductaccordingtotheInstallation
and Maintenance Instructions.
Whereaformal‘permittowork’systemisinforceitmustbecompliedwith.Wherethereisnosuch
system,itisrecommendedthataresponsiblepersonshouldknowwhatworkisgoingonand,where
necessary,arrangetohaveanassistantwhoseprimaryresponsibilityissafety.
Post‘warningnotices’ifnecessary.
1.12 Electrical work
Beforestartingworkstudythewiringdiagramandwiringinstructionsandnoteanyspecialrequirements.
Considerparticulary:mainssupplyvoltageandphase,local mains isolation, fuse requirements,
earthing,specialcables,cableentries/cableglands,electricalscreening.
1.13 Commissioning
Afterinstallationormaintenanceensurethatthesystemisfullyfuctioning.
Carry out test on many alarms or protective devices
1.14 Disposal
Unwanted equipment should be disposed of in a safe manner.
1.15 Returning products
CustomersandstockistsareremindedthatunderECHealth,SafetyandEnvironmentLaw,when
returningproductstoSpiraxSarcotheymustprovideinformationonanyhazardsandtheprecautions
tobetakenduetocontaminationresiduesormechanicaldamagewhichmaypresentahealth,safety
orenvironmentalrisk.ThisinformationmustbeprovidedinwritingincludingHealthandSafetydata
sheetsrelatingtoanysubstancesidentiedashazardousorpotentiallyhazardous.
Warning!
Exclusivelyfollowtheinstructionsindicatedinthisdocument.Failuretocomply
withthisdocumentmaycauseinjurytohealthormaydamagetheequipment.
SPIRAX SARCO®donottakesanykindofresponsibilityfordamagesduetofailure
to comply with this document.
5
3.887.5275.230
2. Introduction
2.1 Product Overview
TheSpiraxSarcoLDSerieselectronictransmittersaredevicesthatuseasensortomeasurepressure,
levelandtemperature,andtransmitacurrentsignal(4÷20mA)proportionaltothemeasuredvariable.
TheLDSeriesconsistsofthefollowingmodels:
TT372 Electronic temperature transmitter
LD276 Electronic pressure transmitter
LD377B Electronicdierentialpressuretransmitter
LD377BL Electronic level transmitter
2.2 Attention!
ThismanualdoesnotcontaininformationconcerningalltypeofTransmitteroralldierentinstallation
and/orworkingandmountingsolutions.
Formoreinformationorforparticularproblemsnotconsideredinthismanual,pleaseaddressto
ourtechnicaloce.
Thewarrantyperiodistheonecontemplatedinourgeneralservicingconditions.
This warranty is neither increased nor restricted by the contents of this manual.
ThisTransmitterhastobeinstalledandusedonlybyqualiedpersonswhohaverstcheckedthe
correctnessofsupplyvoltagesothatbothinstandardworkingconditionsandinpresenceofdamages
oftheplantorofanypartofit,nodangerousvoltagecanreachtheTransmitter.
AstheTransmittercanbeutilizedbothwithhighpressurevaluesandwithaggressivemediaitmust
beconsideredthatanincorrectuseofitcouldbringevenseriousdamagestopeopleandthings.
Acorrectandsafeworkingneedsanadequatetransport,stockandmountingotherthananappropriate
maintenance service.
SoitisnecessaryforthepeoplehandlingtheseTransmittertohaveknowledgeandexperiencein
mounting,servicingandworkingandtohavetitletodotheirjobwithreferenceto“SafetyStandards“.
63.887.5275.230
2.3 Denitions and Symbols
Inthismanualareusedthefollowingsymbolsandlabels:
Equipmentforuseinpotentiallyexplosiveatmospheres
II 1/2G
EquipmentGroupIICategory1/2G,suitableforpotentiallyexplosivearea(gases,
vapoursormists)tobeinstalledinaseparationwallbetweenZone0(process
side)andZone1(externalside)
Ex d DevicewithExplosionProofEnclosure
IIC GroupIICapparatus,tforsubstancesofgroupIIC,IIBandIIA(onlywhenused
intheambienttemperaturerange-40°Cto60°C)
IIB GroupIIB apparatus, t for substancesofgroupIIBandIIA(when used inthe
ambienttemperaturerange-40°Cto80°C)
TemperatureClassofthetransmitter(maximumsurfacetemperature)
T6, onlywhenusedintheambienttemperaturerange-40°C÷60°C
T5, onlywhenusedintheambienttemperaturerange-40°C÷80°C
Ga/Gb EquipmenttobeinstalledintheboundarywallbetweenanarearequiringEPLGa
and the less hazardous area
Warning!
Warning label, used to warn about hazardous materials, locations, or objects,
includingelectriccurrents,poisons,andotherthings.
Prohibition!
Prohibitionlabel,usedtoindicatesomethingisnotpermitted.
Mandatory!
Mandatorylabel,usedtosetobligationtaskstobeperformedbytheuser.
Information!
Informationlabel,usedtosetgeneralinformationfortheuserorwarnabouthazards
for the equipment.
7
3.887.5275.230
3. Description
TheLD357BseriesSMARTdierentialpressuretransmittersaremicroprocessorbasedinstruments
that combine the analog signal advantages (4-20mA) together with the exibility of digital
communicationusingHART®protocol.Theycanberemotelyconguredbyauniversalhandheld
terminal(HHT)orbyaPCwithadedicatedinterface.
Moreover,itispossibletolocallyconguretheinstruments(zeroandspan)bymeansofpush
buttonsandtodisplaythedataonthewideLCDdisplay.
ThetransmitterseriesLD357B,measuredierentialpressurewithspansfrom1.2to20000mbar
withastaticpressureupto200bar.Thepressuremeasuringelementisapiezoresitivesensor.It
is possible to choose a variety of sensors to satisfy all process conditions.
TheSpiraxSarcomeasuringcellcontainsthesensorandtransmitsthepressuretotheelectronics.
ThermaldriftiscompensatedusingthetemperaturesignalgeneratedbyaPTCthermistorintegrated
inthesensoritself.Basedonthesereadingsthemicroprocessorgeneratesthe4-20mAanalog
output"twowiressystem"anddisplaysthepressuremeasurementontheLCD.Someofthemain
characteristicsofthismicroprocessor-basedtransmitter,are:
- WideRangeability;
- Automatictemperaturecompensation;
- DigitalcommunicationusingHART®protocol.
Cable gland
Sensitive element
Enclosure
Fig. 1 - Dierential pressure transmitter LD357B
Process connection
Nom
Range
(mbar)
Span
min/max
(mbar)
Range Limits
min/max
(mbar)
0/18 1.2/18 -18/+18
0/50 3.3/50 -50/+50
0/350 23/350 -350/+350
0/1000 67/1000 -1000/+1000
0/2500 167/2500 -2500/+2500
0/5000 333/5000 -5000/+5000
0/10000 667/10000 -10000/+10000
83.887.5275.230
4. Installation
4.1 Transmitter Identication
Transmitterdatacanbefoundonthenameplatexedonthetopoftransmitterenclosure(seeMarking).
TheSerialNumbermustbequotedattheoccurrenceofaspecicrequesttothemanufacturer.
4.2 General mounting requirements
Priorinstallationshallbeobservedfollowingconsiderations:
- CheckwhetherTransmitter’soperatingconditionsarewithinthelimitsasreportedinthenameplate,
technicalspecicationssheetsand/orlabel.
- Make sure that the operating conditions are compatible with the specication given to the
manufacturer.
Mandatory!
- Formeasurementinthepresenceofparticularlyhotliquids(e.g.steam)make
surethattheTransmitterissuppliedwithasuitablennedarm.
- Forviscousliquidsorthosecontainingsolidparticlesinsuspensionmakesure
thattheconnectiontotheprocessisasuitableoneinordertoavoidclogs.
Warning!
Directsunlightmaycauseseriousdamagestotheinstrument.
Never install standard Transmitter under the sun or in any other location which
couldcausedirectoverheatingthroughradiation.
Fig. 2 - Mounting requirements
Zone 0
Direct
Sunlight
Zone 1
9
3.887.5275.230
4.3 Mechanical Installation
TheTransmittershouldbelocated,ifpossible,atsomeeasilyaccessible,welllightedplaceonthe
vessel,inordertoallowputtinginoperationsandmaintenancework.Locationshouldalsobesuch
thatambienttemperatureattheTransmitterenclosurebenotexcessive(seeMARKING).
Information!
- Plantoverpressure/over-temperature:observeratingplate.
- Installationonseismicareas:informtechnicaldepartment.
- Incaseofunstableuids:informtechnicaldepartment.
- Incaseofdamages:informtechnicaldepartment.
- Inspection frequency: consideration should be given to applicable national
legislation.
Warning!
- Theprocessconnectionmustberealizedin suchawaythatguaranteesthe
holdatthemaximumworkingpressureandtemperature.
- Do not overcome the maximum pressure and temperatures indicated in the
technical data sheet of the selected model.
- Whenthedeviceisconnectedtotheprocessitcanbesubmittedtohighpressures
and temperatures. To avoid accidents subsequent to sudden discharge of
pressureand/ortocontactwithdangerousorammableuidsitisnecessary
totakethemaximumattentionwhentheTransmitteristakeno,heatedor
repaired,verifyingthatitisisolatedfromtheprocessandisnotsubmittedto
pressure and/or temperature.
10 3.887.5275.230
4.4 Installation for relative pressure measurement
ThetransmittersLD357Bmaybeusedforrelativepressuremeasurementsorlevelmeasurements
intanksorpiping.InFig. 3thesimplestmounting,directonpiping,isillustrated.
Warning!
- Remembertointroducealwaysasecurityvalveinordertoputinmaintenance
operations when necessary.
- Whentheconnectionsarelocatedonaverticalprocessline,theowshouldbe
upward.
Information!
Fig. 3, Fig. 4, Fig. 5 e Fig. 6 show some of the installations recommended by ISO
2186Standards.RefertothisStandardformoreinformation.
+ side
- side (ATM)
Shut o valve
FLOW
Fig. 3 - Relative pressure measurements in piping lines
Questo manuale è adatto per i seguenti modelli
3
Indice
Altri manuali Spirax Sarco Trasmettitore
