Extech Instruments ExStik DO600 Bedienungsanleitung

Dissolved Oxygen

DO600

RECALL

UserManual

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ExStik®DO600

DissolvedOxygenMeter

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AdditionalUserManualTranslationsavailableatwww.extech.com

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600

Dissolved Oxygen

DO600

RECALL

Membrane

Cathode

Electrode Bottom View

Introduction

CongratulationsonyourpurchaseoftheExStik

DO600dissolvedoxygen/temperaturemeter

whichsimultaneouslydisplaysdissolvedoxygenandtemperature Unitsofmeasureare%

saturation,mg/lorppmfordissolvedoxygen,and°Cor°Ffortemperature Advancedfeatures

includeDataHold,25‐pointmemory,autopoweroff,automatictemperaturecompensation,

salinityandaltitudecompensation Thismeter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,andCustomerSupport 

MeterDescription

FrontPanelDescription



1 Batterycompartmentcover

2 LCDDisplay

3 MODE/HOLDbutton

4 CAL/RECALLbutton

5 ON/OFFbutton

6 ElectrodeRetainingCollar

7 DissolvedOxygenSensor

8 BondedMembraneCapassembly

9 Membrane&Cathode

(Note:TheElectrodestoragecapisnotshown)

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LCDDisplay

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1 Bargraphdisplay

2 Measurementunits

3 Maindisplay

4 LowBatteryindicator

5 Temperaturedisplay

6 Readingholdindicator

600

Operation

PreparetheElectrode

Theelectrodeisshipped“dry”andrequiresfillingwiththesuppliedelectrolytesolutionbefore

use.Themembraneshouldbeinplaceanddoesnotneedreplacement.Followtheprocedureat

theendofthisguideforfillingthebondedcap.

NOTE:Makesurethattherearenoairbubblesintheelectrodebeforeuse.

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PoweringtheExStik®

TheExStik

usesfour4)CR2032LithiumIonBatteries.PresstheON/O buttontoturnthe

meteronoroff.Ifthebatteriesareweak,the‘BAT’indicatorappearsontheLCD.Theauto

powerofffeatureshutstheExStik

offautomaticallyafterapproximately10minutesof

inactivity.Theautopowerofffeaturemaybetemporarilydisabledforconvenienceorfor

extendedpolarizationtime.

StartupPolarizationPeriod

WhentheExStik

ispoweredupforthefirsttime,theelectroderequirespolarization.Inorder

forthistooccurathreeminuteapprox.)polarizationperiodmustelapsebeforemeasurements

canbemade.

Whenthemeterisleftpoweredon,aspecialcircuitisincludedinthismeterwhichmaintainsa

verysmallbiasingcurrenttotheelectrodeforaperiodofsevendays.Thiskeepstheelectrode

polarizedandenablestheusertomakeimmediatemeasurementswithoutwaitingforthe

electrodetore‐polarize.

EachtimetheExStik®isturnedon,thepolarizationtimerisresetandthe7‐daypolarization

periodisinitiated.Asmallasteriskatthebottomrightcornerofthedisplayisusedtoindicate

thatthepolarizationtimercircuitisactiveevenwhenthemeterisoff.

Turn‐OnDiagnostics

1. WhenthemeteristurnedONtheLCDdisplays“SELF”and“CAL”whilethemeterrunsa

diagnosticroutine.

2. DuringthistimethemeterisrecallingtheUserCalibrationdata,performingselfdiagnostics

&initializingthecircuitry.

3. Afterthisfunctioniscomplete,themeterproceedstothenormalmeasurementmode.

4. TheDO600shouldbecalibrateddailyformeasurementaccuracy.

600

Calibration

1. Calibrationshouldbeperformedonadailybasis.

2. TurnthemeterON

3. PressandholdtheMODE/HOLDbuttonuntil%isdisplayedontheLCD.

4. Ifthemeterhasnotbeenusedforseven7)daysorlonger,allowtheelectrodetofully

polarize.Thismaytake2‐3minutes.

5. Placetheelectrodecapontotheelectrode.Thespongecontainedinthecapshouldbeonly

moistenednotsoaked)withdistilledwater)orcleantapwater.Besurethattheelectrode

membraneiscleananddryorthecalibrationwillbeincorrect.Thereneedstobeanairgap

betweenthemembraneandthesponge.Nevertouchthemembrane,asskinoilwillaffect

theelectroderesponse.

6. WaituntilthereadingstabilizesthenpressandholdtheCAL/RECALLbuttonuntilCALis

showninthelowerdisplay.Thereadingswillblink“101.7”and“SA”willappear.

7. Whenthecalibrationiscomplete“End”willappearandthenthemeterwillreturntothe

normalmeasurementmode.Turnoffthemeter.

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

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Optional’zeroo ygen’calibrationimprovesmeasurementaccuracyforveryloworveryhighDO

measurements):

Placetheelectrodeinazerooxygencalibrationsolution,suchas5%sodiumsulfite,waitfor

stabilityandpresstheCAL/RECALLbuttonuntilCALisshownintheinthelowerdisplay.Stabilityin

azerosolutionmaytakemanyminutes,dependingonelectrodehistory.

Note:SodiumSulfitecanbecomedepositedontheelectrodeandonthe“coined”surfaceofthe

electroderetainingcollar.ThepresenceoftheSodiumSulfitewillnegativelyaffectfutureDO

measurementsuntilsuchatimewhereALLofitisremovedfromtheelectrode.

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OptionalElectronicZerocalibration.

IftheDO600isnotmakingstablemeasurementsoryouarereplacingtheelectrodewithanew

assembly,performthisZerocalibration.



Turnoffthemeter,removetheelectrodebyunscrewingtheretainingringandpulloffthe

electrode.

TurnonthemeterandwaitfortheSelfcalibrationtocomplete.

SettheModeto%.

PressandHoldtheCALbuttonuntilCALappearsonthedisplay.Whenthecalcyclecompletes,the

displayshouldread0.0%.

Turnoffthemeter.

Re‐attachtheelectrode.PerformtheelectrodecapcalibrationfromStep5.

600

Measurements

1. Covertheelectrodewiththeelectrodecap.Thespongecontainedinthecapshouldbe

moistened(notsoaked)with(distilledwater)orcleantapwater.

2. PressingtheON/OFFbuttonturnsthemeterONorOFF.henturnedON,themeter’s

displayswitchesonandtheSelfCalibrationutilityruns(seeabove).

3. Ifthisisthefirsttimethemeterispoweredup,waitapprox.3minutesfortheprobeto

polarize(pleasedisableauto‐poweroff;Instructionsfordisablingauto‐poweroffare

providedinalatersection).Formoredetails,pleasereadtheStartup Polarization Period

paragraphearlierinthismanualbeforecontinuing.

4. SelectthedesiredunitsofmeasurebypressingandholdingtheMODE/HOLDbuttonuntil

theproperunitsareshowninthedisplay.Removetheelectrodecoverandplacethe

electrodeinthesampletobemeasured.Stirtheelectrodeinthesampletoremoveany

trappedairbubblesfromthemembranesurface.Donotsubmersetheelectrodetothe

pointthatthesampleliquidreachesthemeter’selectrodecollar.

5. Allowthemetertimetosettletothefinalmeasurementvalue.

Note:Thelargerthedifferenceintemperaturebetweentheelectrodeandthesolutionthe

longeritwilltakeforthereadingtostabilize.Stabilizationtimecanvaryfromthirty(30)

secondstofive(5)minutes.

MeasurementUnits

Themetercanbesettomeasureeither%saturation,mg/l,orpartspermillion(ppm).

Tochangethemode:

1. PressandholdtheMODE/HOLDbuttonfor2secondsandthedisplaywillbegintoscroll

throughthedifferentunitsofmeasure:

%saturation;D.O.inmg/l;D.O.inppm(partspermillion)

2. henthedesiredunitsaredisplayed,releasetheMODE/HOLDbuttonandtheunitwill

returntonormaloperatingmode.

Note:The“HOLD”functioncannotbeonwhenchangingthemeasurementfunction.If“HOLD”

isdisplayedinthelowerleftcornerofthedisplay,brieflypresstheMODE/HOLDbuttontoturn

itoff.

TemperatureUnits( F/C)

1. iththeunitOFF,pressandholdtheCAL/RECALLbutton.

2. iththeCAL/RECALLbuttondepressed,momentarilypresstheON/OFFbuttontoturnthe

unitON.

3. TheCAL/RECALLbuttoncanbereleasedwhen‘SelfCal’isshowninthedisplay.

SalinityCompensation

1. iththeunitON,momentarilypresstheCAL/RECALLbuttontwiceinquicksuccession

(‘SAL’isshowninthelowertemperaturedisplay).

2. MomentarypresstheMODE/HOLDbutton.EachpressoftheMODE/HOLDbuttonincreases

thecompensationby1ppt(partperthousand);theavailablerangeis0to50ppt.

3. MomentarilypresstheCAL/RECALLbuttontosavethecompensationsettingandreturnto

thenormalmeasurementmode.

600

AltitudeCompensation

1. iththeunitON,momentarilypresstheCAL/RECALLbuttontwiceinquicksuccession

(‘SAL’isshowninthelowertemperaturedisplay.

2. PressandholdCAL/RECALLagainfor2secondstoentertheAltitudeMode(‘Ald’willbe

showninthelowertemperaturedisplay).

3. Thefactorydefaultvalueissealevel.EachpressoftheMODE/HOLDbuttonincreasesthe

compensationby1000ft.Themaximumvalueis20presses(20,000ftabovesealevel).

4. MomentarilypresstheCAL/RECALLbuttontosavethecompensationsettingandreturnto

thenormalmeasurementmode.

Auto‐PowerOFFFeature

Theautopowerofffeatureautomaticallyshutsthemeteroff10minutesafterthemostrecent

buttonpress.Todisablethisfeature,refertotheDisableAuto‐PowerOFFsection.

DisableAuto‐PowerOFFFeature

iththeunitON,momentarilypresstheCAL/RECALLbutton,thenquicklypressandholdboth

theMODE/HOLDandON/OFFbuttonsuntil‘off’isdisplayed.TorestoretheAutoPowerOff

Feature(autopowerOFFenable)simplyturnthemeteroffandonagainusingtheON/OFF

button.

LowBatteryIndi ation

henthebatteryvoltagefallsbelowtheoperatingthreshold,‘BAT’willappearonthedisplay.

RefertotheMaintenancesectionforbatteryreplacementinformation.

StoringReadings

1. PresstheMODE/HOLDbuttontostoreareading.Thestoragelocationnumberwillbe

displayedonthelowerdisplay,whilethemaindisplayshowsthestoredreading.Themeter

willentertheHOLDmodeandthe“HOLD”indicatorwillappearontheLCD.

2. PresstheMODE/HOLDbuttonagaintoexittheHOLDmodeandreturntonormal

operation.ThenexttimeMODE/HOLDismomentarilypressedanotherreadingisstored

andsoon.

3. Ifmorethan25readingsarestored,previouslystoredreadings(startingwithreading

number1)areoverwritten.

Re allingStoredReadings

1. MomentarilypresstheCAL/RECALLbuttonandthenwithin4secondsmomentarilypress

theMODE/HOLD.Thelaststoreddatapointlocationwillbedisplayed(1to25).Eachtime

theMODE/HOLDbuttonismomentarilypressedthenextmostrecentlystoreddatapoint

willbedisplayed.

2. Afterthelastdatapointstoredisdisplayed,pressingtheMODE/HOLDbuttonagainreturns

thedisplaytothebeginningofthelist.

3. PressingtheCAL/RECALLbuttonatanytimestopsthedataretrievalprocessandreturnsthe

metertothenormalmeasurementmode.



600

ClearingStoredReadings

1. iththeunitONpressandholdtheON/OFFbuttonfor4seconds

2. hen“clr”isshowninthemaindisplaythememoryiscleared.

MeasurementandDisplayConsiderations

TheDO600usesapolarographicsensor,whichconsumesoxygenatthesensingsurface.

Thisrequiresaconstantmovementofthesampleacrossthemembranetomaintaina

constantdissolvedoxygenlevel.Itisrecommendedthattheprobebemovedinthesample

asthemeasurementismade,orifinalaboratoryenvironment,thesamplebestirredusing

astirplate.

IfyouaremeasuringDOinasmallcontainer,theprobewillconsumeoxygenasitis

measuringandthemeasurementvaluewillcontinuetogolower.

Iftheunitappearstobelocked(displayfrozen).ItispossiblethattheDataHoldmodehas

beeninadvertentlyaccessedbyapressoftheMODE/HOLDbutton(HOLDwillbedisplayed

inthebottomleftoftheLCD).SimplypresstheMODE/HOLDbuttonagainorturnthe

meteroffandbackonagain.

Ifthemeterdoeslatchupandnobuttonpressesreviveit,removethebatteriesandrestart.

Formaximumaccuracy,allowsufficienttimeforthetemperatureoftheprobetoreachthe

temperatureofthesamplebeforetakingareading.Thiswillbeindicatedbyastable

temperaturereadingonthedisplay.



MembraneMaintenan e

Firstuse

henyoufirstgotouseanewmeter,youwillneedtoremovethemembranecapand

replaceitwithanewcapfilledwithrefillsolution.

PleaseNote:Theinstallationofabondedcapcausesthemembranetobetightlystreched

overthecathode.Onceabondedcapisremovedreinstallationisnotpossibleasthe

membranewillnolongerbeproperlystrechedoverthecathode.



Storage

Thespongecontainedintheprotectiveelectrodecapshouldbeonlymoistened(notsoaked)

with(distilledwater)orcleantapwater.



600

Maintenance

BatteryRepla ement

1. Twistoffthebatterycompartmentcover.

2. Holdingthebatteryhousinginplacewithafinger,pulloutthebatterycarrierusingthetwo

smalltabs.

3. Replacethefour(4)CR2032batteriesobservingproperpolarity.

4. Replacethebatterycarrier,reattachthebatterycompartmentcapandtightensecurely.



Neverdisposeofusedbatteriesorrechargeablebatteriesinhouseholdwaste.

Asconsumers,usersarelegallyrequiredtotakeusedbatteriestoappropriate

collectionsites,theretailstorewherethebatterieswerepurchased,orwherever

batteriesaresold.

Disposal:Donotdisposeofthisinstrumentinhouseholdwaste.Theuseris

obligatedtotakeend‐of‐lifedevicestoadesignatedcollectionpointforthedisposal

ofelectricalandelectronicequipment.



OtherBatterySafetyReminders

Neverdisposeofbatteriesinafire.Batteriesmayexplodeorleak.

Nevermixbatterytypes.Alwaysinstallnewbatteriesofthesametype.

Ele trodeRepla ement

1. Toremovetheelectrode,firstturntheinstrumentOFFandthenunscrewandremovethe

electroderetainingcollar.(turnthecollarcounter‐clockwisetoremove).

2. Gentlyrocktheelectrodefromsidetoside,pullingitawayfromthemeteruntilit

disconnects.

3. Toattachanelectrode,alignthepositioning“keys”ontheelectrodeandthemainbody

housingandthencarefullypushtheelectrodeintothemetersocketuntilitisfullyseated.

4. Tightentheelectroderetainingcollarfirmlyenoughtosealtheelectrodewiththemeter.

600

DOBondedMembraneCaprepla ement

ImportantNote:Donottouchthemembraneasskinoilswillinterferewiththeoxygen

permeabilityrateofthemembrane.Usecautionwhenreplacingthebondedcap.

1. Itisrecommendedthattheelectroderemainattachedtothemeterduringthis

replacementprocess.

2. Toremovethebondedcapfromtheelectrode,unscrewthecapfirmlyandcarefully

counter‐clockwisefromtheelectrodeseediagrambelow).

3. Discardtheusedcap.PleaseNote:Theinstallationofabondedcapcausesthemembrane

tobetightlystrechedoverthecathode.Onceabondedcapisremovedreinstallationisnot

possibleasthemembranewillnolongerbeproperlystrechedoverthecathode.

4. RinsetheoldelectrolytesolutionfromtheCathodeandAnodebeforecontinuing.

5. UsethesuppliedPolishingPaperSeeAccessoriestable)toclean,polish,shine,and/or

removescratchesfromthecathode.Besuretomoistentheclothbeforepolishingthe

cathode.Donotover‐polishthesensitivegoldcathode.

6. Setthenewreplacementbondedcaponaflatsurface.Leavethecapinthisposition

throughoutthereplacementprocess.

7. Fillthebondedcapwiththeelectrolytesolutionuptothebottomofthethreadsonthe

insideofthecap.

8. Tapthesideofthebondedcaptohelpjarfreeanytrappedairbubblesfromtheelectrolyte

solution.

9. Keepingthecapinafixedpositiononaflatsurface,carefullyinserttheelectrodeintothe

newbondedcapbyfirstdippingandremovingtheelectrodeseveraltimesfromthecap.

Witheachdip,pushtheelectrodeprogressivelydeeperintothebondedcap.Finally,screw

theelectrodeslowlyontothebondedcapclockwise)untilfullytightened.Thedippingand

removaltechniqueminimizestheintroductionofairbubblesintotheelectrolytesolution.

Airbubblesintheelectrolytecancompromisemeasurements.

10. Duringthetighteningofthebondedcap,excesselectrolytesolutionwillleakout,thisis

normalanddesireablesinceitminimizestheintroductionofairpockets.Cleanoffthe

excesselectrolytebeforeuse.





Cathode

Electrode

Bonded Cap

Anode

Air Vents

BONDED CAP

Clockwise to tighten

Counter-clockwise to loosen

600

Specifications

Display2000count,Dualfunction3½digitLCDwithBargraph,

Displaysize:24mm20mm

SensorPolarographictype

MembraneBondedmembranecapwiththreadedfitting

OperatingTemp.Range0to50°C(32to122°F)

ATCRange0to50°C(32to122°F)

SalinityCompensation0to50pptin1ppt(partperthousand)increments

Altitudecompensation6000m(0to20,000ft)in300m(1000ft)increments

MeasurementStorage25tagged(numbered)datasetswithrecall

BatteryPowerFour(4)CR2032buttonbatteries

LowBatteryIndication‘BAT’appearsontheLCD

AutoPowerOffAfter10minutesofinactivity(APOoverrideavailable)

Dimensions/Weight3617341mm(1.46.81.6”);110g(3.8oz)



MeasurementRangeResolutionA ura y

%Saturation0to200.0%0.1%±2.0%FS(fullscale)

DissolvedOxygen

Concentration

0to20.00mg/l0.01mg/l±2%FS

0to20.00ppm0.01ppm±2%FS

Temperature0to50°C0.1°C±1.0°C

32to122°F0.1°F(0to99ºF);

1.0°F(>100°F)

±1.8°F



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