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SR200 Surface Roughness Tester
User Manual
Table Of Contents
Chapter 1 Using the SR200 with a PC 3.3 Specification for Data Dump 5.5
Introduction to Surface Texture Printing 3.3 Chapter 6 Accessories 6.1
terminology and definitions 1.1 To cancel print: 3.3 Chapter 7 Maintenance 7.1
Surface Texture Definitions 1.1 Chapter 4 Menu Settings 4.1 Calibration 7.1
Parameter Definitions 1.2 Main Menu 4.1 Reference Standard 7.1
Ra 1.2 Cut off 4.1 Sensitivity Check and Adjustment 7.1
Rp 1.2 Evaluation length 4.1 Cleaning the Stylus 7.1
RSm 1.2 Parameters 4.1 Pick-up Skid 7.1
Rz 1.2 Range: 4.3
Rz1max 1.2 Range Selector Table 4.3
Rt 1.2 Print Settings: 4.3
Rmr 1.3 Units: 4.3
RPc 1.3 Filter: 4.3
Rsk 1.3 Dump Mode: 4.3
Rda 1.3 Dump Mode (Using your SR200
Chapter 2 Description 2.1 with a PC) 4.3
The Equipment 2.1 SPC Mode 4.4
Traverse Unit 2.2 Language Settings 4.4
Pick-up Mounting Components 2.3 Chapter 5 5.1
Mounting Bracket 2.3 Making Measurements
Adjustable Support 2.4 Technical Considerations 5.1
Pick-up holder 2.4 Operating Notes 5.1
Connector 2.4 On a horizontal surface 5.1
Pick-up 2.5 On other surfaces 5.1
Mounting 2.6 Cut off: 5.2
Chapter 3 Getting Started 3.1 Evaluation Length: 5.2
Battery 3.1 Table of Cut-off values 5.2
Connecting the Pick-up 3.1 Operating Error Indications 5.2
Making a measurement 3.2 Specification 5.3
Switching the SR200 ON 3.2 RS232 Output 5.3
To cancel a measurement 3.3 Printer Configuration 5.3
Table Of Contents
Chapter 1 Using the SR200 with a PC 3.3 Specification for Data Dump 5.5
Introduction to Surface Texture Printing 3.3 Chapter 6 Accessories 6.1
terminology and definitions 1.1 To cancel print: 3.3 Chapter 7 Maintenance 7.1
Surface Texture Definitions 1.1 Chapter 4 Menu Settings 4.1 Calibration 7.1
Parameter Definitions 1.2 Main Menu 4.1 Reference Standard 7.1
Ra 1.2 Cut off 4.1 Sensitivity Check and Adjustment 7.1
Rp 1.2 Evaluation length 4.1 Cleaning the Stylus 7.1
RSm 1.2 Parameters 4.1 Pick-up Skid 7.1
Rz 1.2 Range: 4.3
Rz1max 1.2 Range Selector Table 4.3
Rt 1.2 Print Settings: 4.3
Rmr 1.3 Units: 4.3
RPc 1.3 Filter: 4.3
Rsk 1.3 Dump Mode: 4.3
Rda 1.3 Dump Mode (Using your SR200
Chapter 2 Description 2.1 with a PC) 4.3
The Equipment 2.1 SPC Mode 4.4
Traverse Unit 2.2 Language Settings 4.4
Pick-up Mounting Components 2.3 Chapter 5 5.1
Mounting Bracket 2.3 Making Measurements
Adjustable Support 2.4 Technical Considerations 5.1
Pick-up holder 2.4 Operating Notes 5.1
Connector 2.4 On a horizontal surface 5.1
Pick-up 2.5 On other surfaces 5.1
Mounting 2.6 Cut off: 5.2
Chapter 3 Getting Started 3.1 Evaluation Length: 5.2
Battery 3.1 Table of Cut-off values 5.2
Connecting the Pick-up 3.1 Operating Error Indications 5.2
Making a measurement 3.2 Specification 5.3
Switching the SR200 ON 3.2 RS232 Output 5.3
To cancel a measurement 3.3 Printer Configuration 5.3
1.1 SR200 Specificationssubjecttochange
Chapter 1
Introduction to Surface Texture terminology and definitions
Surface Texture Definitions Everycomponentssurfacehassomeformoftexturewhichvariesaccordingtoitsstructureandthewayithasbeenmanufactured.Thesesurfacescanbebrokendownintothreemaincategories:Surfaceroughness,WavinessandForm.Inordertopredictacomponentsbehaviourduringuseortocontrolthemanufacturingprocess,itisnecessarytoquantifythesesurfacecharacteristics.Thisisdonebyusingsurfacetextureparameters.
Surface Texture Parameters:Canbeseparatedintothreebasictypes:Amplitude,SpacingandHybrid.
Amplitude Parameters:Measuresoftheverticalcharacteristicsofthesurfacedeviations.
Spacing Parameters:Measuresofthehorizontalcharacteristicsofthesurfacedeviations.
Hybrid Parameters:Combinationsofspacingandamplitudeparameters.
Mean Line:Isaleastsquareslineofnominalformfittedthroughtheprimaryprofilewheretheareasoftheprofileaboveandbelowthislineareequalandkepttoaminimumseparation.ProfilefiltersasdetailedinISO11562definethemeanlinesfortheroughnessandwavinessprofiles.
Cut-off:Acut-offlength(orsamplinglength)isafilterthatuseseitherelectronic(2CR)ormathematical(Gaussian)meanstoremoveorreduceunwanteddatainordertolookatwavelengthsintheregionofinterest.
Bandwidth:IstheratiooftheupperCut-off(Lc)tothelowerCut-off(Ls).
Sample Length:Theprofileisdividedintosamplelengthsl,whicharelongenoughtoincludeastatisticallyreliableamountofdata.Forroughnessandwavinessanalysis,thesamplelengthisequaltotheselectedcut-off(lc)wavelength.Thesamplelengthisalsoknownasthecut-offlength.
Evaluation Length:ThelengthinthedirectionoftheXaxisusedforassessingtheprofileunderevaluation.Theevaluationlengthmaycontainoneormoresamplelengths.Fortheprimaryprofilestheevaluationlengthisequaltothesamplelength.
SR200 Specificationssubjecttochange 1.2
Note: almost all parameters are defined over one sample length, however in practice more than one sample length is assessed (usually five) and the mean calculated. This provides a better statistical estimate of the parameters measured value.
Parameter Definitions Surfacetextureisquantifiedbyparameterswhichrelatetocertaincharacteristicsofthetexture.TheSR200offersthefollowingparameters:
Ra,Rp,Rsm,Rz,Rt,Rmr,RPc,Rz1max,Rsk,Rda
Additionalparameterscanbeanalysedbydownloadingresultstooptionalsoftware.
Ra:Universallyrecognised,andmostused,internationalparameterofroughness.Itisthearithmeticmeanoftheabsolutedeparturesoftheroughnessprofilefromthemeanline.
Rp:Maximumprofilepeakheight
Mathematically,thelargestpeakdeviationoftheroughnessprofilefromthemeanlinewithinasamplinglength.
Whenmorethanonesamplinglengthisanalysedrpisthemeanvalueoftheindividualrpvaluesforeachsample.
RSm:Themeanspacingbetweenprofilepeaksatthemeanline,measuredwithinthesamplinglength.(Aprofilepeakisthehighestpointoftheprofilebetweenanupwardsanddownwardscrossingofthemeanline).
Rz:Rz=Rp+Rvandisthemaximumpeaktovalleyheightoftheprofilewithinasamplinglength.
WhenmorethanoneSamplingLengthisanalysedRzisthemeanvalueoftheindividualRzvaluesforeachSamplingLength.
Rz1max:MaximumHeightofProfile
Highestpeaktovalleywithinasamplinglength.Whenmeasuredoverseveralsamplinglengthsthelargestindividualsamplinglengthvalueistaken.
AlsoknowninthepastasRymax,Ry,RmaxorRti
Rt:TotalHeightoftheProfile.
MaximumPeaktoValleyHeightoftheProfileintheAssessment(evaluation)Length(ln).
1.3 SR200 Specificationssubjecttochange
Rmr:MaterialRatioisthelengthofbearingsurface(expressedasapercentageoftheevaluationlengthln)atadepthbelowthehighestpeak.
Replacestp%-BearingRatioasdefinedinISO4287-1984
RPc:PeakCount
Thenumberoflocalpeakswhichprojectthroughaselectablebandcentredaboutthemeanlineoralineparalleltoit.Thecountisdeterminedonlyovertheevaluationlengththoughtheresultsaregiveninpeakspercm(orperinch)
KnownasPcbefore1997
Rsk:Skewness
Rskisameasureofthesymmetryoftheprofileaboutthemeanline.
Thisparameterindicateswhetherthespikesonthesurfacearepredominatelynegativeorpositiveoriftheprofilehasanevendistributionofpeaksandvalleys.
Rda:RDeltaaorRdaorRDa-ArithmeticalMeanSlope
ArithmeticalMeanSlopeoftheProfilewithintheSamplingLength.
SR200 Specificationssubjecttochange 2.1
Chapter 2
Description
TheSR200isaportable,self-containedinstrumentforthe
measurementofsurfacetextureandissuitableforuseinboththeworkshopandlaboratory.Parametersavailableforsurfacetextureevaluationare:
Ra, Rz, Rt, Rp, Rmr, RPc, Rv, Rz1max, Rsk, Rda
AnexplanationofthesurfacetextureparametersevaluatedbythisinstrumentisgiveninChapter1.
Theparameterevaluationsandotherfunctionsoftheinstrumentaremicroprocessorbased.ThemeasurementresultsaredisplayedonanLCDscreenandcanbeoutputtoanoptionalprinterorcomputerforfurtherevaluation.
Theinstrumentisnormallypoweredbyanalkalinenon-recharge-ablebattery.Ifpreferred,anoptionalpoweradaptorcanbeused
Figure 1
The Equipment
ThestandardSR200includes:•1Traverseunit•1StandardPickup•1ReferenceSpecimen
•1Pickupcable•1Screwdriver•1Battery
Note: certain items described in this handbook are optional and may not form part of your particular system.
2.2 SR200 Specificationssubjecttochange
Traverse Unit
Thetoppanelofthetraverseunitcarriesamembranetypecontrolpanelandaliquidcrystaldisplay.Theunithousestheelectronicsforcontrollingthemeasurementsequence,computingthemea-
surementdataandoutputtingtheresultstothedisplay,ortothe
RS232portforusewithaprinter(whenincluded)ortoacom-
puter,forfurtheranalysis.
Theunitalsocontainsadrivemotorwhichtraversesthepickup
acrossthesurfacetobemeasured.Themeasuringstrokealwaysstartsfromtheextremeoutwardposition.Attheendofthemeasurementthepickupreturnstothispositionreadyforthenext
measurement.Thetraverselengthisdeterminedfromselectionsofcut-offorlength.
Figure 2
Pick-up Connector Select Key Display
Battery Compartment
RS232 Connector
Measure key Scroll key Print key
Battery
SR200 Specificationssubjecttochange 2.3
Pick-up Mounting Components
Thepick-upisfastenedtothedriveshaftbythefollowingmeans:
Mounting Bracket. Thisisclampedtothedriveshaftbymeansofaknurledknob.Althoughnormallyusedupright,asshowninfigure3,itcanbeturnedtoanglethepick-uportotakeitoffthecentreline,asshowninfigure3a.Itcanalsobemountedside-waysonthedriveshaft,whentherightanglepick-upisinuse.
Figure 3: pick up mounting
Pick-up Insert Extension rod here Clamp Drive Shaft
Connector Adjustable Pick-up Support Mounting Bracket
Pick-up Holder Mounting Bracket Clamp Screw
Use this mounting position when the right angled pick-up is used
2.4 SR200 Specificationssubjecttochange
Figure 3a Figure 3b
Adjustable Support: Thiscanbeclampedatanypositionontheslideofthemountingbrackettoprovidepick-upheightadjustment.
Pick-up holder: Thisfitsintothecrutchofthepick-upsupportandisheldinplacebyaspringplunger.Abiasedholder,whenusedasshowninfigure3,exertsabiasingforceonthepick-up(dependingonwhichwaytheholderisinsertedintothesupportcrutch).Itcanalsobeusedtopositionthepick-updirectlyunderneaththedisplayunit,asshowninfigure4.
Figure 4
Theholderwillholdthepick-upatrightanglestothedriveshaftwhenitispivotedawayfromthesurface(egwhilechangingtheworkpiece).
Connector: Theconnectorofthepick-upleadisscrewedintotheendofthepick-upandistheninsertedintotheendofthepick-upholder,withtheleadcomingoutthroughtheslot
SR200 Specificationssubjecttochange 2.5
intheholder.Itisadvisabletoconnecttheleadtothedisplay-traverseunitfirstandthenthepick-up.Toconnectthepick-uptothedisplay-traverseunit:thepick-uphas2threadedendswithlocationpins.InsertthelocationpinsecurelyintotheSR200bodyandtightenthethreadedcollar.
Whentheextensionrodisused,theshortpick-upleadisnotrequiredandtheendoftheroditselfisinsertedintotheholder.
Pick-up: Thepick-upisavariableinductivetypetransducer,whichissupportedonthesurfacetobemeasuredbyaskid,acurvedsupportprojectingfromtheundersideofthepick-upinthevicinityofthestylus.Asthepick-uptraversesacrossthesurface,movementsofthestylusrelativetotheskidaredetectedandcon-vertedintoaproportionalelectricalsignal.Theradiusofcurvatureoftheskidismuchgreaterthantheroughnessspacing.Thisenablesittorideacrossthesurfacealmostunaffectedbytheroughness,andprovideadatumrepresentingthegeneralformofthesurface.Evenso,wherethewavinessiswidelyspaceditwillbenecessarytousethepick-upwithshoe,inconjunctionwiththe2.5mm(0.1in)cut-off.
Figure 5: the pickup is supported on the workpiece by the skid
Thereareseveraldifferenttypesofpickupavailabledesignedfordifferentapplications,detailsaregivenintheAccessoriessectionofthishandbook.Theydifferonlyinthestylustipradius,thedimensionsofthehousingorpositionandtheshapeoftheskid.Thestylusmaterialinallthepickupsisdiamondforlowwear.Theskidsofthestandardpickupsareofredruby.
Figure 6. Standard pick-up dimensions
2.6 SR200 Specificationssubjecttochange
Mounting: Onaflatsurfacethedisplay-traverseunitcanbesupportedonitsthreefeet.
Ifauserwishestomakehisownmountingbracketfortheunit,thedimensionsofthefixingholesareshowninfigure7.
Figure 7
SR200 Specificationssubjecttochange 3.1
Chapter 3
Getting Started
Battery Toinsertabattery,openthecompartmentbyslidingthedoortotherightandremovethedoorfromtheunit.Insertthebattery,withtheterminalspositionedasshowninthediagramonthefloorofthebatterycompartment.
Connecting the Pick-up Plugtheleadintothesocketonthefrontoftheunitandmountthepick-upasfollows:Theconnectorofthepick-upleadisscrewedintotheendofthepick-upandistheninsertedintotheendofthepick-upholder,withtheleadcomingoutthroughtheslotintheholder.Itisadvisabletoconnecttheleadtothedisplay-traverseunitfirstandthenthepick-up.Toconnectthepick-uptothedis-play-traverseunit:thepick-uphas2threadedendswithlocationpins.InsertthelocationpinsecurelyintotheSR200bodyandtightenthethreadedcollar.
Rotatethepick-uptobringthestylusvertical;thiscanconvenientlybedonewithreferencetotheidentitynumberengravedattheendofthepick-up.
PositionthePickupstylusonthecomponenttobemeasured,withthestylusparalleltothecomponent(seefigure8below).Ensurethatthestylustipisincontactwiththesurface(thiscanbeverifiedbycheckingthattheidentitynumberengravedattheendofthepick-upisvertical).Theskidshouldalsobeincontactwiththesurface.
Figure 8
3.2 SR200 Specificationssubjecttochange
Making a measurement Note 1: If the pickup has been changed or the instrument is being used for the first time, the instrument should be calibrated (see Chapter 7).
Note 2: Successful use of the SR200 will only be possible if it is operated on a surface free from external vibration - see also operating notes in Chapter 5.
Switching the SR200 ON PressingtheSCROLLkeybringsthedisplayonandthepreviouslyselectedset-upisdisplayed(providedpowerhasbeencontinuouslypresent).Thedisplayisautomaticallyturnedoffiftheinstrumentisnotusedfor30seconds.
Ifthebatteryisdeadorhasbeenremoved,thepreviouslyselectedset-upislost.WhenabatteryhasbeenreplacedandtheSCROLLkeyispressed,thestartupmessagewilldisplayfor2secondsandthenthedefaultsettingsarerestored.
The default settings areParameter: RaCut-off: 0.8mmEvaluationlength: 4.0mmRange: 100mmDatadumpevaluationlength: 4.0mmDatadumprange: 100mmNoparameter/graphselectedforprintoutLanguage EnglishFilter Gaussian
Iftheuserwishestochangeanyofthesesettings,thiscanbecarriedoutusingtheSCROLLandSELECTkeys(seeChapter4formoredetail)
PresstheMEASUREkey.Whenthemeasurementiscompletedthepickupreturnsandtheresultsaredisplayedonthescreen(seeexamplebelow):
GaussLc 0.80mmEvalLength 25.0mmRa =0.00µmRz =0.00µmRt =0.00µmRp =0.00µmRSmm =0.00µm
more...>
SR200 Specificationssubjecttochange 3.3
Ifmultipleparametershavebeenselectedtheymaynotfitonthedisplay.Tocontinueviewingtheremainingresults,clickontheSELECTkey.
To cancel a measurement IfMeasureispressedduringatraverse,astopandreversalwithoutmeasurementwilloccurandMeasurementCancelledisdisplayed.
Using the SR200 with a PC IftheSR200isconnectedtoaPCthenmeasurementswillbetakenindumpmode,whichisselectedusingtheSCROLLandSELECTkeysfromthemainmenu(seenextchapterforfullset-updetails).PositionthePickupstylusonthecomponenttobemeasured.MeasurementsarethenactivatedfromthesoftwareonthePC.WhenthemeasurementiscompletedthepickupreturnsandtheresultsaredumpeddirectlytothePC.DuringtransferofthemeasurementdatathemessageDataDumpingisdisplayed.
Whenthedatadumpiscompleted,thedumpmenustillremainsactive.Fromthedisplayedmenu,valuesofevaluationlengthandrangecanbechangedandfurthermeasurementsfordatadumpcanbemade(seenextchapterforfurtherdetails).
Printing PRINTkey:pressingthiskeycausestheevaluatedmeasurementdatatobeoutputtotheRS232port.Whenaprinterisconnected,aprintoutofalltheparametersselectedintheprintmenuismade.
IfSPChasbeenselected(seechapter4)theheadingisdisabled.
Wheretheprofileislongerthan80cmtheprintoutwillstopafter80cm.PressingPRINTkeycanprintthenext80cm.TheprintoutwillstartfromthebeginningoftheprofileifSELECTisactivated.
Ifnolegalsurfacedataisstored,theerrormessage“Measurebeforeprint”isdisplayed.
To cancel printPressingthePRINTkeyduringprintout(beforedisplayhasupdatedtoMainmenustate)stopstheprintoutand“Printercancelled”isdisplayedfor2seconds.ThenormalupdatetoMain-statethencontinues.
4.1 SR200 Specificationssubjecttochange
Chapter 4
Menu Settings
TheoperationoftheSR200isbasedonmakingselectionsfrommenuspresentedontheliquidcrystaldisplay.Twomenustatesexist,theseare:MainMenuandDataDumpMenu.TheDataDumpmenuisaccessedviatheMainMenuandisusedwhenconnectingtoaPC.
Main Menu TheMainMenu(accessedbypressingtheScrollkey)isusedtomakethefollowingselections:
CUT-OFFEVALUATIONLENGTHPARAMETERSRANGEPRINTSETTINGSUNITSFILTERDUMPMODE
TheSCROLLkeyisusedtocyclethroughtheseoptionsandtheSELECTkeyisusedtoconfirmthesetupscreenrequired.ForachartofdefaultsettingsseeChapter3.
Cut Off: Toselectthecut-offrequired,selecttheCut-offoptionfromthemainmenu.PresstheSCROLLkeytotogglethroughthecut-offoptionsuntiltherequiredcut-offishighlightedonthescreen,thenpresstheSELECTkey.Seechartinchapter5forfurtherinformation.
Evaluation Length. Toselecttheevaluationlengthrequired,selectthisoptionfromthemainmenu.PresstheSCROLLkeytotogglethroughtheevaluationlengthoptionsuntiltherequiredlengthishighlightedonthescreen,thenpresstheSELECTkey.
Theevaluationlengthoptionsaredeterminedbythecut-offlengthselected.
Parameters: selecttheParametersoptionfromthemainmenu.Alistoftheparametersavailablewillappear
SR200 Specificationssubjecttochange 4.2
onthescreen(seebelow).PresstheSCROLLkeylefttorightacrossthecolumnsthenpresstheSELECTkeyforeachparameterrequired(multipleselectionscanbemade).TheSELECTkeyisalsousedtode-selectaparameter.
Ra RSmRz Rz1max
Rt RskRmr>>> settingsRpc>>> settings
Exit
WhenselectingtheRmrandRpcparameters,additionalsettingsneedtobespecified.SCROLLonto“Settings”thenclickontheSELECTkey.Thefollowingscreenwillappear:
Rmr settingsMr %+OffsetMeanline +OffsetExit
TheSCROLLkeywillcyclethrough‘Mr%+Offset’,‘Meanline+Offset’and‘Exit’.TheSELECTkeywillallowthealterationofoneofthe2settingsor,ifExitishighlighted,willreturntothemainparameterselectionscreen.
PressingSCROLLwillstepthecursor(orhighlightedcharacter)throughthe3decimaldigitsofthepercentage,thenthesignand3decimaldigitsoftheoffsetandthentoOK.PressingSELECTwillchangethesign/digit-keeppressingSELECTuntiltherequiredfigureisreached.PressingSCROLLsavesthechangeandmovesthecursoralongtothenextdecimaldigit.WhencompleteSelectOKtoreturntothepreviousmenu.
Rmr SettingsMr% 001%Offset +00.0µm
OK
ThefollowingscreenisdisplayedforRpcsettingsandisamendedinthesamewayasabove.
Rpc Bandwidth00.0µmOK
4.3 SR200 Specificationssubjecttochange
Range:Allowstheusertoscrollthroughtherangeoptions.Themostcommonsettingsareasfollows:
Forsurfaces<10micronpeaktovalley-selectrangeof10µm
Forsurfaces<100micronpeaktovalley-selectrangeof100µm
Forsurfaces<300micronpeaktovalley-selectrangeof300µm
Range Selector Table ParameterResolutionResolutionResolutionat10µmrangeat100µmrangeat300µmrange
Ra 0.01µm 0.01µm 0.1µmRp 0.01µm 0.1µm 1.0µmRz 0.01µm 0.1µm 1.0µmRz1max 0.01µm 0.1µm 1.0µmRt 0.01µm 0.1µm 1.0µmRmr 0.1% 0.1% 0.1%RPc 1decimalpoint 1decimalpoint 1decimalpointRsk 0.001µm 0.001µm 0.001µmRda 0.1deg 0.1deg 0.1degRsm 1.0µm 1.0µm 1.0µm
Print Settings: Allowsselectionofprintoptions.Usercanchoosetoprintanycombinationofgraph,parametersandheaderinformation.Thescaleofthegraphcanalsobeselected.SCROLLthroughandpresstheSELECTkeyforeachitemrequired-atickwillappearalongsidetheitem.
Units:Allowsimperialormetricunitstobeselected.
Filter: AllowsfilteroptionsofeitherGaussianor2CR(seeexplanationinChapter1).
Dump Mode: ThismenumodeisusedifconnectingtheSR200toaPC(seebelow)
Dump Mode (Using your SR200 with a PC)IfusingtheSR200withaPCyouwillneedtoselecttheDUMPMODEoptionfromthemainmenu.ScrolltoDumpmodeON.EachtimetheSR200isswitchedon,thefollowingdumpmodemenuoptionswillbeavailable:
SR200 Specificationssubjecttochange 4.4
EVALUATIONLENGTHRANGEUNITSFILTERDUMPMODE
AllothersettingsarecarriedoutviathePC.
SPC Mode IfSPCisrequired,thiscanbeswitchedonbypressingthePRINTandSCROLLkeydownsimultaneously.Thefollowingwarningscreenwillappear:
Warning
Changestothefollowingsettingsareforadvancedfunctionsonly
Quit OK
SelectingOKdisplaystheSelectlanguageandselectSPCmodescreen.SelecttheSPCModethenSCROLLwilltogglethemodebetweenONandOFF.WhenSELECTispressedwithOKselectedthepreviousscreenwillbeshownagain.
S PC ModeON
OK
Language Settings ThedefaultontheSR200isEnglishLanguage.Iftheuserwishestoselectotherlanguages,pressthePRINTandSCROLLkeydownsimultaneously.Thefollowingwarningscreenwillappear:
Warning
Changestothefollowingsettingsareforadvancedfunctionsonly
Quit OK
4.5 SR200 Specificationssubjecttochange
SelectingOKdisplaystheSelectlanguageandselectSPCmodescreen.
Select Language
Select SPCmode
Quit
SCROLLdowntheoptionsandSELECT
Select LanguageEnglishFrançaisDeutschItaliano
OK
SCROLLdownthelistoflanguageswithandSELECT.Thisselectionwillremainasthedefaultunlesspowerislost(egbatteryisremoved).
SR200 Specificationssubjecttochange 5.1
Chapter 5 Making Measurements - Technical Considerations
Operating Notes Beforemeasurementsaremade,thereareafewgeneralpointsofprocedurewhichshouldbeobserved.
1.Thesurfacetobemeasuredmustbefreefromvibrationandtheinstrumentmustbecompletelysteadyduringameasurement.
2.Alwaysturnthepick-upsothatthestylusisvisiblyperpendiculartothesurfacetobemeasured.
3.Setthedisplay-traverseunitsothatthetraverseismadeparalleltothesurfacebeingmeasured.
4.Afterameasurement,thetraverseunitcanberemovedfromthesurfaceassoonasthepick-upcompletesitsreturnstroke.Thedisplaywillremainvisible.
5.Wherethetextureofasurfacehasapredominantdirectionalcharacter(LAY),itisusualtotraverseacrossthelay,notalongit.
On a horizontal surface1.Usethebiasedpick-upholderonthedisplay-traverseunit
2.Cleanthesurfacetobemeasured,sothatitisfreefromabrasivematerial,grease,sudsetc.Thisisnecessarytoensureaccuratereadingsandtoreducewearontheskid.
3.Makethecut-off/lengthandparameterselectionsrequired
4.Positionthedisplay-traverseunitandpick-upsothatthestyluscontactsthesurfaceandthepick-upisapproximatelyparalleltothesurface.Makesurethatthelengthofsurfaceissufficientformeasurement,rememberingthatthetraversemotionisinwardstowardsthedisplay-traverseunit.
5.PresstheMeasurekey.Whenthetraverseiscompleted,theresultsaredisplayedandthepick-upreturnstoitsextremeoutwardposition.
6.Ifanerrormessageisdisplayed,identifythecause,correctitandrepeatthemeasurement.
On other surfaces Onaverticalsurface:Ifnecessary,holdthedisplay-traverseunitbyhandonthesurface,makingsurethatitdoesnotmoveduringthemeasurement.
Inasmalldeepbore:Fittheoptionalextensionrodbetweenpickupandholder.
5.2 SR200 Specificationssubjecttochange
Cut off Afewtrialmeasurementsmadeondifferentsurfaceswillsoondemonstratethatonsome,theresultsobtainedareverydependentuponthecut-offselected.Thisshowsthatitisimportanttochoosethecut-offtosuitthesurface.Ingeneral,finesurfacesrequireshortcut-offsandroughsurfacesalongerone.Thetableonthefollowingpagegivessomeguidanceonsuitablecut-offs.
Evaluation Length Alongevaluationlengthismainlyforuseonsheetmetalandsimilarmaterials,wherealongersurfaceisrequiredtoberepresentativesofthematerialbeingexamined.
Table of Cut-off values Ifnototherwiseindicatedonadrawing,thefollowingshouldbeusedtodeterminethecut-offλc(ISO4288)-1996.RecommendedCut-offISO4288-1996
PeriodicProfiles Non-periodicProfiles Cut-offsSamplingLength/EvaluationLength
SpacingDistancesSm(mm)
Rz(µm) Ra(µm) λc(mm) λc/L(mm)
>0.013to0.04>0.04to0.13>0.13to0.4>0.4to1.3>1.3to4
(0.025)to0.1>0.1to0.5>0.5to10>10to50>50to200
(0.006)to0.02>0.02to0.1>0.1to2>2to10>10to80
0.080.250.82.58
0.08/0.40.25/1.250.8/42.5/12.58/40
Operating Error Indications Duringameasurementamessagemaybedisplayedwhichindicatesthatanerrorconditionhasoccurred.Themessagesandtheprobablecausesfortheirdisplayareasfollows:
Display ReasonformessageMotorError MotorfaultPick-upError Responseatpick-uplevelerrororfaultyconnectionOverrange Selectedrangetoosmall
ECanoccurinfrontofameasuredvalueduetoexcessiveslewrateforasingledatapoint(largespike).Mayalsooccurifthepick-upisliftedoffthesurface
DatatransmiterrorPrinterconnectedatstartoftransmissionbutlaterdetectedasnotconnected(printeroffline)
Batterylow
Whenbatteryvoltage<6.4V:keypushoperationsaredisabledanddisplayisoff.WhentheinstrumentisinthesleepmodeandtheMEASUREkeyispressed,then“Batterylow”isdisplayedfor2seconds,followedbythenormaldisplayoroperation.StoredsurfaceprofileiserasedReneworrechargebattery
SR200 Specificationssubjecttochange 5.3
Measurebeforeprint pressingPRINTkeybeforemeasurementNoparameterselected pressingPRINTkeybeforeselectingprintoutparameters
PrinternotconnectedpressingPRINTkeywhenprinternotconnectedornocomputerconnectedtoreceivedumpdata.
PrintingcancelledpressingPRINTkeyduringdatatransmissiontoprinter(stopprinting).Messagedisplayedfor2seconds.
Measurementcancelled
PressingMEASUREkeyduringtraverse(stoptraverse)
Measurebeforedatadump
Attempteddatadumpbeforemeasurement
Specification
BatteryAlkaline:minimum600measurementsof4mmmeasurementlengthNi-Cad:minimum200measurementsof4mmmeasurementlengthSize:6LR61(USA/Japan)
TraverseSpeed 1mm/secMeasurement metric/inchunitsCut-offvalues 0.25mm,0.8mmand2.5mm(0.01in,0.03inand0.1in)Traverselengths 0.25-25mm(0.05-0.98in)Display LCD-matrix,8linesx20characters,alphanumeric
9pinD-connectorfemale.ContainingRS232hardwiredhandshake(RS232level).
Accessorysocket
Transmitfunctiononlyhardwareimplemented.Remotestart(5Vlogic)Remotestart:shorttoground.Constantpoweroninstrument(5Vlogic)WhenconnectedtoGround,constantpowerison
RS232 Output PrinterConfiguration
IfSPCisonBaudrate 4800BaudParity EvenDatabitlength 7bitsPrinterheaddisabled
IfSPCisoffBaudrate 9600BaudParity OddDatabitlength 8bitsPrinterheadenabled
Outputtoprinter(inASCIIcharacters)orpre-selectedparametersandprovidedthatGispre-selected,areadoutofdccorrectedsurfaceprofile.
5.4 SR200 Specificationssubjecttochange
Languageofprintoutsameaslanguageofdisplay
Theprintoutheadingisshownbelow:
StarrettSR200Operator:…Date:……Object:……Cutoff =xxxmmEvaluationlength =xxxmmFilter =xxx
SR200 Specificationssubjecttochange 5.5
Specification for Data Dump
ThefollowingformatisusedfordatadumpfromSR200toaPC.
Transmission set up is as follows:
Baudrate: 9600BaudNumberofdatabits 8Startbit: 1Stopbit: 1Parity: None
Resolution Horizontal Vertical0.5µmforEvaluation 10nmLength8mm1.0µmforEvaluationLength>8mm
Evaluationlengthselectable0.25mm,0.8mm,1.25mm,2.5mm,4.00mm,8.0mm,12.5mm.25.0mm
Rangeselectable 10µm,100µm,300µmTransmission RS232Transmitteddataisunfiltered NoparametersarecalculatedTransmissiondata
Datatype Function Comments
2bytes Numberofdatavalues Totalnumberoftransmitteddatavalues
1byte Ordinatespacing Numberofdatavaluespermm
1byte Firstdatavalue Resolution10nm
1byte DiffdatavalueDifferencebetweenthisandthepreviousdatavalue
#80 Stopbyte 2stopbytesaresent
#80 Stopbyte Makingitpossibletotestforalldatavaluesreceived
Thetotalnumberoftransmitteddatabytesare,numberofdatavalues+5Thedatavaluecanbecalculatedfrom,datavalue(n)=datevalue(n-1)+diffdatavalue(n),n1.
6.1 SR200 Specificationssubjecttochange
Chapter 6
Accessories
Replacement Standard pick-up (SR-112-1503) Detailsasthestandardpick-up,(seefigure6pg2.5)10mm(400min)stylustipradius.ConformstoUSspecifications(ANSIB46.1).
Small bore pick-up, 5µm (200µin) stylus tip radius (SR-112-1504) Forgeneraluseinsmallbores,onnarrowsurfacesandingrooves,orwiththeskidsupportedindependentlyofthesurfacebeingmeasured.Onthispick-uptheskidisintegralwiththestylusarmhousingandissetfurtherbackfromthestylus.Thisenablesthepick-uptobeusedinshortboreswiththeskidsupportedindependentlyofthesurfacebeingmeasured,egbythedatumsupportstand.
Figure 9: The small bore pickup Figure 10: The right angle pickup
Right Angle Pick-up, 5µm (200µin) stylus tip radius (SR-112-1505) Thispick-upisusedatrightanglestothedirectionoftraverse.Accordinglytheskidissetatrightanglestoitsnormalposition.
Itisparticularusefulingroovesorslotswherethelayofthesurfacetexturemakesitunsuitableformeasurementwithastandardorsmallborepick-up.Whenusedoncylindricalworkpiecesitisimportantthatthestylusandskidshouldbeequidistantfromthecrest(seefigure11),andthattheworkpieceispositionedsothatthecrestisparalleltothelineoftraverse.
Figure 11: Conditions to be observed when the right angle pick-up is used on a cylindrical work-piece
SR200 Specificationssubjecttochange 6.2
Chapter 6
Accessories
Replacement Standard pick-up (SR-112-1503) Detailsasthestandardpick-up,(seefigure6pg2.5)10mm(400min)stylustipradius.ConformstoUSspecifications(ANSIB46.1).
Small bore pick-up, 5µm (200µin) stylus tip radius (SR-112-1504) Forgeneraluseinsmallbores,onnarrowsurfacesandingrooves,orwiththeskidsupportedindependentlyofthesurfacebeingmeasured.Onthispick-uptheskidisintegralwiththestylusarmhousingandissetfurtherbackfromthestylus.Thisenablesthepick-uptobeusedinshortboreswiththeskidsupportedindependentlyofthesurfacebeingmeasured,egbythedatumsupportstand.
Figure 9: The small bore pickup Figure 10: The right angle pickup
Right Angle Pick-up, 5µm (200µin) stylus tip radius (SR-112-1505) Thispick-upisusedatrightanglestothedirectionoftraverse.Accordinglytheskidissetatrightanglestoitsnormalposition.
Itisparticularusefulingroovesorslotswherethelayofthesurfacetexturemakesitunsuitableformeasurementwithastandardorsmallborepick-up.Whenusedoncylindricalworkpiecesitisimportantthatthestylusandskidshouldbeequidistantfromthecrest(seefigure11),andthattheworkpieceispositionedsothatthecrestisparalleltothelineoftraverse.
Recess pick-up, 5µm (200µin) stylus tip radius (SR-112-1506) Thispick-uphasanextendedstylusandskidformeasuringatthebottomofarecess,orbetweenshouldersandflangesupto5.7mmdeep.Aspecialdeeprecesspick-upisavailableformeasuringuptoadepthof25mm.
Figure 12: The recess pickup
Extension rod (SR-112/1510) 200mmlongextensionwithintegrallead,fitsbetweenthepick-upandcarriage.Theextensionrodisfittedtothepick-upinthefollowingmanner:
1.Disconnectthepick-upleadfromthetraverseunitandremovethepick-upfromthetraverseunitcarriage.
2.Removetheleadfromthepick-up
3.Carefullylocatethecentralpinoftheextensionrodwiththeholeinthepick-upandscrewtherodandpick-uptogether.
4.Threadtheleadfromtheextensionrodthroughtheholeprovidedinthebackplateofthetraverseunitandconnectittothetraverseunitsocket.
5.fitthepick-upintothetraverseunitcarriage,positionedasrequired.
Power AdaptorSR-112-3530 PowerAdaptor(UK) SR200SR-112-3531 PowerAdaptor(US-110V) SR200SR-112-3532 PowerAdaptor(EURO-230V)(2PIN) SR200
Chapter 7
Maintenance Calibration
Reference Standard Thesensitivityoftheinstrumentischeckedwiththereferencespecimensupplied.ThiscomprisesaruledsurfacehavinganRavalueaccuratetowithin4%ofthevaluemarkedonitsmount.
Toprovideconfidenceinresults,itisrecommendedthatasensitivitycheckismadeatthebeginningofeachshift.
Sensitivity Check and Adjustment Theprocedureforcheckingandadjustingthepick-upsensitivityisasfollows:
1.Placethereferencespecimenonaflatsurfaceandsetuptheinstrumenttomakeatraverseacrossit.Makesurethatthetraverseunitbodyisparalleltothesurfaceofthestandardandthatthestylustraversesatrightanglestothelayofthegrooves.
2.Selectthe0.8mmor0.03incut-offandtheRaparameter.
3.MakeameasurementofthereferencespecimenandcomparetheRavaluefromthedisplaywiththatmarkedonthespecimen.
4.Ifitdiffersbymorethan2%usethesmallscrewdrivertoturnthesensitivityadjuster.ThisislocatedthroughtheholewhichislocatedinthefrontpaneloftheDisplayUnit,justabovethepick-upconnector.
5.Repeatthemeasurementandadjustment,untilthemeasuredvalueiswithin2%ofthevaluemarkedonthespecimen.
Cleaning the Stylus Occasionallycleanthestyluswithacamelhairbrushmoistenedwithaproprietarycleaningagent.
Pick-up Skid Toreducetheeffectofwear,onpick-upswitharotatableskid,occasionallyturntheskidroundtopresentanewcontactsurface.Theskidisclampedbythescrewinthefrontofthepick-up.
Whenlooseningthisscrew,takecarenottolettheretainingpinnexttotheskidfallout.Whenretighteningthescrew,ensurethattheendcoveriscorrectlypositionedwithrespectothestylusandthatthestylusisfreetomove.
7.1 Form965-SR200 4/11 2.5C/T starrett.com