Bronkhorst FLOW-SMS Series Manuel d'utilisateur télécharger pdf (Page 21)

BRONKHORST HIGH-TECH B.V.

9.17.057 page 21

4 Advanced operation

4.1 Using mass flow meters/controllers on different gases or under different

conditions

4.1.1 Stored calibration curves

FLOW‐SMSinstrumentswithdigitalpc‐boardsallowstorageofmax.8calibrationcurvesforvariousgasesorprocess

conditions.Fluidsetscandigitallybeselectedwhentheinstrumentishooked‐upbyRS232toacomputer,using

(Bronkhorst)softwaretools.

4.1.2 Multi Fluid / Multi Range instruments

InstrumentswithactivatedMultiFluid/MultiRange(MFMR)functionalityarecalibratedforstandardrangeswhich

caneasilybeconfiguredforotherfluidsandranges.Changingfluidandrangecanbeperformedbymeansofthe

softwaretoolFlowTune,throughtheRS232connectionofaninstrument.Theprogramcanconverttheprimal

calibrationcurveinsidetheinstrumenttotheselectedfluidandrange.

IndigitalinstrumentswithactivatedMFMRfunctionalitytheparameterscapacity, density,unittype,capacityunitetc.

aredynamicparameters.Forexample,changingthecapacityunitfrom‘ml

n/min’to‘ln/min’effectsthatthecapacity

automaticallychanges,forinstancefrom2000ml

/minto2l

/min.The100%outputisnotaffected.Changingthe

capacityfrom2000ml

/minto1000ml

/mineffectsthattheinstrumentsfullscalecapacity(100%output)changes

to1000ml

n/min.Theinstrumentisreranged.

4.1.3 Conversion factor calculation using Fluidat software

BronkhorstHigh‐TechB.V.gatheredthephysicalpropertiesofover600fluidsinadatabase calledFLUIDAT.

Applicationsoftware,suchasFLOWCALCULATIONS,enablestheusertocalculateaccurateconversionfactors,not

onlyat20°C/1atmbutatanytemperature/pressurecombination,bothforgasesandforliquids.

Applytoyourdistributorformoredetailsofthissoftware.



CheckFLUIDAT®onhttp://www.fluidat.com

FLUIDAT®isacollectionofroutinestocalculatephysicalpropertiesofgasesandliquids.Theseroutines

aremadeavailableattheFLUIDAT®ontheNetwebsite.

4.1.4 Sealing material



Beforeusingforadifferentfluid,checkifthesealingmaterialofthecompletemodulelikeO‐rings,

plungerandpackingglandofcapillaryaresuitablefortheapplication.Theinstrumentisfittedwith

Viton,EPDMorKalrezseals.Whichsealingmaterialisusedisshown inthelastcharacterofthemodel

key.Itisalsoimportanttomakesurethatthesealsofthemountingaccessories(baseblock,adapters,

etc.)aresuitableforthefluidsused(seeschematicdiagram/dimensionaldrawing).



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Bronkhorst FLOW-SMS Series Manuel d'utilisateur Page 21