Extech Instruments 341350A Manuale utente

USERGUIDE



OysterMeter

pH,Conductivity,TDS,Salinity,andORP(mV)



Model341350A



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Introduction

CongratulationsonyourpurchaseoftheExtechOysterSeriesmeter.ThisdevicemeasurespH,

Conductivity,TDS,ORPandSalinity.Thesemetersareintendedforroutinelaboratoryandfield

testing.Accuratemeasurementsareprovidedinabatteryoperated,portablemeterwithahinged

displaythatcanbeadjustedtoanyviewingangle.Thisdeviceisshippedfullytestedandcalibrated

and,withproperuse,willprovideyearsofreliableservice.Pleasevisitourwebsite

(www.extech.com)tocheckforthelatestversionofthisUserGuide,ProductUpdates,Product

Registration,andCustomerSupport.



MeterDescription

FrontandSidepanels

1. LCDdisplay

2. Batterycompartment

3. Powerbutton

4. Up/Downarrowbuttons

5. MODE/CALbutton

6. UNIT/SETbutton

7. STORE/RECALLbutton

8. Connector,Conductivityprobe

9. Connector,pHprobe,ORPprobe

10. Connector,Temperatureprobe

11. Connector,ACadaptor



Display

1. Modeindicators

2. Primarydisplay

3. DataHoldindicator

4. ProbeRenewindicator

5. AutoPowerOffindicator

6. Lowbatteryindicator

7. Memorystatusindicators

8. Calibrationstatusindicators

9. Temperaturedisplay

10. Unitindicators

891011

789

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Operation

BatteryInstallation/Replacement

Openthebatterycoverbyinsertingasmallcoinintothelatchslotandpressingdownward.The

coverwillreleaseinthedirectionofthearrow.Installthenewbatteryandreplacethecover.



pHMeasurements

1. PressthePOWERbuttontoturnthemeterON(themeterwillcyclethroughaself‐check).

2. PresstheMODE/CALbuttonuntilthePHiconswitcheson.

3. PresstheUNIT/SETbuttontoselectºCorºF.

4. ConnectthepHelectrodetothesidepHBNCconnector.

5. Adjustthe▲▼buttonstomatchthetemperatureofthesolution(orusetheexternal

temperatureprobetodoso).

6. Ifrequired,calibratetheelectrode(seepHCalibration).

7. PlacetheelectrodeinthesamplesolutionandreadthepHvalueonthedisplay.

8. Whenallmeasurementshavebeentaken,unplugtheelectrodeandrinseindistilledwater;

thenshakeandstoreitinthewettingcapwith4.0MKCLorinapH4buffersolution.

Conductivity/TDS/SaltMeasurements

1. PressthePOWERbuttontoturnthemeterON.

2. PresstheMODE/CALbuttonuntiltheCOND,SALTorTDSiconisdisplayed.

3. Connecttheconductivityelectrodetothesideconductivityconnector.

4. Ifrequired,calibratetheelectrode(seeConductivityCalibration).

5. Placetheelectrodeinthesamplesolutionandreadthevalueonthedisplay.

6. Whenfinished,unplugtheelectrodeandrinseindistilledwater.

ORP(mV)Measurements

1. PressthePOWERbuttontoturnthemeterON.

2. PresstheMODE/CALbuttonuntiltheORPiconisdisplayed.

3. ConnecttheORPelectrodetothesideORPBNCconnector.

4. PlacetheelectrodeinthesamplesolutionandreadthemVvalueonthedisplay.

5. Whenallmeasurementshavebeentaken,unplugtheelectrodeandrinseindistilledwater.

6. Storetheprobetipinthewettingcapina4.0MKCLorinapH4buffersolution.

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DataMemory

25readingscanbestoredto,andrecalledfrom,theinternalmemory.

Storingreadings

1. Withthereadingonthedisplay,momentarilypresstheSTORE/RECALLbutton.TheSTORE

andHOLDdisplayiconswillappearontheLCDandthereadingwillfreeze.

2. MomentarilypresstheSTORE/RECALLbuttonagaintoconfirmandtoreturntothenormal

operationmode.

3. Upto25readingscanbestoredinthisway.

RecallingReadings

1. PressandholdtheSTORE/RECALLbutton.TheRECALLiconandthememorylocation

numberwillappear,followedbythedatastoredinthedisplayedmemorylocation.

2. Usethe▼▲buttonstoscrollthroughthememorylocationsandtoviewthestoreddata.

3. MomentarilypresstheSTORE/RECALLbuttontoexittheRecallReadingsmode.Endwill

appearinthedisplay;themeterwillthenreturntothenormalmeasurementmode.

Clearingthememory

Withthemeteron,pressandholdthe▼and▲buttonsfor2seconds.TheCLriconwillappear

onthedisplay,indicatingthatthememoryhasbeenerased.

TemperatureUnits

PresstheUNITbuttontoselectºForºC.

ManualTemperatureCompensation

InthepHmode,thesolutiontemperaturecanbemeasuredandsetbyusingtheoptional

externaltemperatureprobeor,whentheprobeisnotused,byadjustingthetemperature

display.Pressthe▲▼buttonstosetthetemperaturewhentheMTCiconisdisplayed.



TheConductivityprobehasabuilt‐intemperaturesensorsomanualtemperaturecompensation

doesnotapplyforConductivitymeasurements.

AutoPoweroff(APO)

ThemeterisequippedwithanAutomaticPowerOfffeature.Themeterwillpowerdownaftera

10‐minuteperiodofinactivity.ThisfeaturecanbedisabledbypressingandholdingthePOWER

buttonfor2seconds(theAPOdisplayiconindicatesthatthisfeatureisenabled).Afterdisabling

APO,thenexttimethemeterispoweredupAPOwillbere‐enabled.

ResettoDefaultsettings

Themetercanberesettoitsfactorydefaultconfiguration:

1. WiththemeterOFF,pressandholdthePOWERandSTORE/RECALLbuttonssimultaneously

untildFLtrStappearsinthedisplay.

2. Releasethebuttonsandthemeterwillcontinuewithanormalstartup.

3. Defaultvaluesinclude:Calibrationvalues,Conductivitymode,ºC,MTC,APOandRENEWoff



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pHCalibration(1,2,or3points)

Atwopointcalibrationwithabufferof7plus4or10(whicheverisnearesttotheexpected

samplevalue)isalwaysrecommended.Aonepointcalibration(choosethevalueclosesttothe

expectedsamplevalue)orathreepointcalibrationisalsovalid.Forbestaccuracy,always

calibrateatthesampletemperature.Frequencyofcalibrationisdependentonhowoftenthe

meterisused,thecareoftheelectrode,andstrengthofthesamplestested.Typically,itis

recommendedthatcalibrationbeperformedonceaday;orbeforeeachuseifthemeterisnot

usedonadailybasis.

1. ConnectthepHprobeandplaceitintoapH7buffer.

2. PressthePOWERbuttontoturnthemeteronandpresstheMODE/CALbuttonuntilthePH

iconappears.(Note:disabletheAutoPowerOfffeaturetoavoidanautomaticpoweroff

duringcalibration).

3. IftheMTCiconappearsnexttothetemperaturedisplay,pressthe▼or▲buttontoset

thetemperatureofthepHbuffer.Iftheoptionaltemperatureprobeisused,insertthe

probeintothebuffersolution.

4. PressandHOLDtheMODE/CALbuttonuntilthedisplaybeginstoflash‘7.00’.Themeter

automaticallyrecognizesthebufferandcalibratesitselftothatvalue.Attheendofthe

calibrationcycle,SAandEndwillbrieflyappearonthedisplayandthemeterwillreturnto

thenormaloperatingmode.

5. Whenacalibrationisperformed,thecalibrationicons(pH10)(pH7)(pH4)willbe

cleared(calibrationdataisnoterased)andwillbereplacedwhenasuccessfulcalibrationis

performedforeachbufferwithinonepoweroncycle.Theseiconsindicatewhatcalibration

levelswerelastperformed.Theydonotindicatehowrecentlythecalibrationwas

performedorifthecalibrationsarestillvalid.

6. RemovetheelectrodefromthepH7buffer,rinseinarinsesolutionandinsertitintothe

pH4orpH10buffersolution.

7. Repeatstep4forthesecondcalibrationpointandthenthethirdpointifdesired.

Note:Iftheoutputoftheelectrodefallsoutsidepredeterminedlimits,themeterwillcancelthe

calibration,indicateEnd,andflashtheRENEWicon.Thistypicallyhappenswhentheelectrode

hasagedandneedsreplacement.

Note:Toavoidcrosscontamination,alwaysrinsetheelectrodeinarinsesolution,likedistilled

water,whenchangingfromonebufferorsampletothenextbufferorsample.



ORPCalibration

TheORPelectrodedoesnotrequirecalibration.

However,youcantesttheORPprobe’saccuracyusinganORPstandard.



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Conductivity(TDS&Salt)Calibration

Conductivityaccuracyverificationshouldbeperformedonaperiodicbasis;oncepermonthis

therecommendedcyclefornormaluse.Ifcalibrationisrequired,aconductivitystandard

solutionmustbeobtained.Themetercanbecalibratedinanyorallofthethreeranges.

Standardizingsolutionsof84µS/cm,1413µS/cmor12.88mS/cm(12,880µS/cm)areusedforthe

automaticcalibrationrecognitionprocedure.Noothercalibrationvaluesarepermitted.

Calibrationisalwaysdoneinconductivitymode.SincesalinityandTDSvaluesarecalculated

fromconductivityvalues,thisprocedurealsocalibratestheSalinityandTDSranges.

1. Fillasamplecupwiththestandardizingsolution.

2. TurnthemeterONandinserttheelectrodeintothesolution.Tapormovetheelectrodein

thesampletodislodgeanyairbubbles.

3. PressandholdtheMODE/CALbutton(approximately2seconds)untilthemaindisplay

startsflashing.

4. Themeterwillautomaticallyrecognizeandcalibratetothestandardizingsolution.Atthe

endofthecalibration,thedisplaywillbrieflyindicate“SA”,“End”andthenreturntothe

measurementmode.

Note:The“SA”willnotappearifthecalibrationfails.

5. The“rangecalibrated”alertwillappearinthedisplayforeachrangethatiscalibrated

duringthatpoweroncycle.

Lowrange,84µS/cm

Mediumrange,1413µS/cm

Highrange,12.88mS/cm(12,880µS/cm)

Note:Themeterallowsfora1,2or3pointcalibration.Ifcalibrationisdoneformorethanone

point,thelowestvaluestandardshouldbedonefirsttoobtainthebestaccuracy.



Temperature(pHandConductivity)OffsetCalibration

Thisprocedureallowsforerrorcorrectionoftheexternaltemperatureprobe(pH)orthe

conductivityprobe’sbuilt‐intemperaturesensor.

1. SwitchtopHorConductivity(Salt/TDS)mode.

2. Placethetemperatureprobeorconductivitycellinthesampleandallowthetemperature

readingtostabilize.

3. PressandholdtheUNIT/SETbuttonuntiltheºCorºFiconbeginsflashing.

4. Adjustthe▼or▲buttonstosetthedisplaytoindicatetheknowntemperatureofthe

sample.

5. MomentarilypresstheUNIT/SETbuttontosavethechangeandreturntothemeasurement

mode.



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341350A-en-US_V1.3 8/15

pHTroubleshootingChart

SymptomCauseRecommendedSolution

Longresponse

timeorreading

drift

CloggedJunctionSoakin4.07MKCL@60oCfor30

minutes

Oil,paint,dyes,suspendedsolidson

sensor

Rinseelectrodealternatelywith

materialssolventthenbuffer7.00

DryBulbLongtermstoragewithoutwetting Soakelectrodetipinwettingcapfilled

with1ml7.00bufferfor24to48hours

StaticChargeWipingelectrodesRinseelectrodein7.0bufferandblot.

Donowipeelectrode.

Samereadingsin

differentbuffers

andsamples

CrackedorbrokenbulbReplaceelectrode.Usebulbguard.

Avoidplungingelectrodetobottomof

containerandspinningbars.Awetting

capwillprotectbulbbetween

measurements.

ErraticLCD

display

Sampleshavelowionicstrength

(lackssalt);e.g.distilled,de‐ionized,

boiled,lakewater(highpressure)

Foreach50mlofsampleadd1drop

(50uL)ofSAT.KCLNoalterationinpH

willoccurbyinertKCL.



NotesonpHmeasurementsandelectrodes

1. TheElectrodeshouldbestoredinitswettingcapuntilused.UseapH4buffersolutionora

4.0MKCLsolution.

2. Ifbubblesareseeninthebulbarea,holdtheelectrodebyitscapandshakedownwards

untilbubblesareremoved.

3. Toimprovespeedofresponse,vigorouslystirtheelectrodeinthesample,buffer,orrinse

solution.

4. Afterexposuretoasample,buffer,orrinsesolution,shaketheelectrodewithasnap

motiontoremoveresidualdropsofsolution.

5. Whenpossible,usepartofthenextsample/buffertobemeasuredasarinsesolution,.

6. Keepbuffersandsamplesatthesametemperaturetoavoidtemperatureeffects.

7. pHreadingsstabilizefasterinsomesolutionsthanothers;allowtimetostabilize.

8. Electrodesdeteriorateovertime.Ifaccuracyfallsto10%theelectrodeshouldbecleaned.If

noimprovementisobserved,replacetheelectrode.

NotesontheConductivity/TDS/SaltCell

1. CellStorage:Onsheathedcells,replacethesheathoverthecellwhenstoring.Fornon‐

sheathedversions,soakthecelltipinde‐ionizedwaterforstorage.

2. CellCleaning:Aftereachuse,thecelltipshouldberinsedwithde‐ionizedwater.Ifsolids

buildupinsidethecellcarefullyremovewithacottonswabsoakedinsolventtakingcare

nottotouchthemetalpartsoftheinnercell.

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GLOBAL SCIENTIFIC SUPPLY

The Laboratory Supply Company!

341350A-en-US_V1.3 8/15

SPECIFICATIONS

RangesResolutionAccuracy

pH0.00to14.00pH0.01pH±0.02pH

Conductivity0.0to200.0µS

200to2000µS

2.00to20.00mS

0.1µS

1µS

0.01mS

±2%FS

TDS0.0to134.0ppm

134to1340ppm

1.34to13.40ppt

0.1ppm

1ppm

0.01ppt

(calculatedfromConductivity)

Salinity0.0to100.0ppm

100to1000ppm

1.00to10.00ppt

0.1ppm

1ppm

0.01ppt

(calculatedfromConductivity)

ORP‐1500to1500mV1mV±3mV

Temperature32to194ºF

0.0to90.0ºC

0.1º≤99.9º

1º≥100º±2ºF/1ºC(meter+probe)



Display9999countLCD

MTCtemperaturerange32.0to194.0ºF(0.0to90.0ºC)

pHcalibrationpoints4.00,7.00and10.00pH

Conductivitycalibrationpoints84.0µS,1413µS,and12.88mS

TDSconversionratio0.67(fixed)

Salinityconversionratio0.5(fixed)

AutoPowerOFFAfter10minutesofinactivity(canbedisabled)

Overrangeindication “OL”

OperatingTemperature41ºFto104ºF(5ºCto40ºC)

StorageTemperature‐4ºFto140ºF(‐20ºCto60ºC)

OperatingHumidityMax80%upto87ºF(31ºC)decreasinglinearlyto50%at

104ºF(40ºC)

StorageHumidity<80%

OperatingAltitude7000’(2000m)maximum

Power9ValkalinebatteryorACadapter

Dimensions4.7x3.8x1.8”(118x96x45mm)withmeterclosed

Weight12oz.(340g)



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The Laboratory Supply Company!

341350A-en-US_V1.3 8/15

Warranty

FLIRSystems,Inc.warrantsthisExtechInstrumentsbranddevicetobefreeofdefectsinpartsandworkmanshipforthree

yearsfromdateofshipment(asixmonthlimitedwarrantyappliestosensorsandcables).Ifitshouldbecomenecessaryto

returntheinstrumentforserviceduringorbeyondthewarrantyperiod,contacttheCustomerServiceDepartmentfor

authorization.Visitthewebsitewww.extech.comforcontactinformation.AReturnAuthorization(RA)numbermustbeissued

beforeanyproductisreturned.Thesenderisresponsibleforshippingcharges,freight,insuranceandproperpackagingto

preventdamageintransit.Thiswarrantydoesnotapplytodefectsresultingfromactionoftheusersuchasmisuse,improper

wiring,operationoutsideofspecification,impropermaintenanceorrepair,orunauthorizedmodification.FLIRSystems,Inc.

specificallydisclaimsanyimpliedwarrantiesormerchantabilityorfitnessforaspecificpurposeandwillnotbeliableforany

direct,indirect,incidentalorconsequentialdamages.FLIR’stotalliabilityislimitedtorepairorreplacementoftheproduct.The

warrantysetforthaboveisinclusiveandnootherwarranty,whetherwrittenororal,isexpressedorimplied.

Calibration,Repair,andCustomerCareServices

FLIRSystems,Inc.offersrepairandcalibrationservicesfortheExtechInstrumentsproductswe

sell.NISTcertificationformostproductsisalsoprovided.CalltheCustomerServiceDepartmentfor

informationoncalibrationservicesavailableforthisproduct.Annualcalibrationsshouldbe

performedtoverifymeterperformanceandaccuracy.Technicalsupportandgeneralcustomer

serviceisalsoprovided,refertothecontactinformationprovidedbelow.



Allrightsreservedincludingtherightofreproductioninwholeorinpartinanyform

www.extech.com

SupportLines:U.S.(877)439‐8324;International:+1(603)324‐7800

TechnicalSupport:Option3;E‐mail:[email protected]

Repair&Returns:Option4;E‐mail:[email protected]

Productspecificationsaresubjecttochangewithoutnotice

Pleasevisitourwebsiteforthemostup‐to‐dateinformation

www.extech.com

FLIRCommercialSystems,Inc.,9TownsendWest,Nashua,NH03063USA

ISO9001Certified

info@GlobalScientificSupply.com

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GLOBAL SCIENTIFIC SUPPLY

The Laboratory Supply Company!

341350A-en-US_V1.3 8/15

Garantie

FLIRSystems,Inc.garantitquecetappareilExtechInstrumentsestexemptdedéfautsmatériauxetdefabricationpendant

troisanneesàpartirdeladated’envoi(unegarantielimitéedesixmoiss’appliqueauxcapteursetauxcâbles).Silerenvoide

l’appareilpourréparationdevientnécessairedurantouaprèslapériodedegarantie,contactezleserviceclientpour

autorisation.Pourobtenirlescoordonnées,visitezlesiteWebsuivant:www.extech.com.Unnumérod’autorisationderetour

(AR)doitêtredélivréavanttoutretourdeproduit.L’expéditeurprendàsachargelesfraisd’expédition,lefret,l’assuranceet

l’emballagecorrectdel’appareilafindeprévenirtoutedétériorationdurantletransport.Cettegarantienes’appliquepasaux

dommagesimputablesàl’utilisateur,telsquel’usageimpropreouabusif,unmauvaiscâblage,uneutilisationnonconformeaux

spécifications,unentretienouuneréparationincorrecte,outoutemodificationnonautorisée.FLIRSystems,Inc.déclinera

spécifiquementtoutegarantieouqualitémarchandeouaptitudeàl’emploiprévu,etneseraenaucuncastenuresponsable

pourtoutdommageconséquent,direct,indirectouaccidentel.LaresponsabilitétotaledeFLIRestlimitéeàlaréparationouau

remplacementduproduit.Lagarantiedéfinieci‐dessusestinclusiveetaucuneautregarantie,écriteouorale,n’estexpriméeou

implicite.

Calibrage,réparationetservicesaprès‐vente

FLIRSystems,Inc.offredesservicesdecalibrageetderéparationpourlesproduitsExtech

Instrumentsquenouscommercialisons.NousfournissonségalementunecertificationNISTpourla

plupartdesproduits.Contacteznotreserviceclientpourtouteinformationsurlesservicesde

calibragedisponiblespourceproduit.Uncalibragedoitêtreeffectuéchaqueannéepourvérifier

lesperformancesetlaprécisiondumètre.Nousoffronségalementuneassistancetechniqueetun

serviceàlaclientèle.Veuillezvousreporterauxcoordonnéesfourniesci‐dessous.



Tousdroitsréservés,ycomprislareproductionpartielleoutotalesousquelqueformequecesoit.

www.extech.com

Lignesd’assistance:États‐Unis(877)439‐8324;international:+1(603)324‐7800

Serviced’assistancetechnique:Option3;E‐mail:[email protected]

Réparationsetretours:Option4;E‐mail:[email protected]

Lesspécificationsproduitsontsujettesàmodificationssanspréavis.

Pourlestoutesdernièresinformations,veuillezvisiternotresiteWeb.

www.extech.com

FLIRCommercialSystems,Inc.,9TownsendWest,Nashua,NH03063USA

CertifiéISO9001

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GLOBAL SCIENTIFIC SUPPLY

The Laboratory Supply Company!

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