Extech Instruments DO210 User manual

UserGuide
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DissolvedOxygenMeter
ModelDO210
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DO210-en-GB_v1.2 11/14
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Introduction
ThankyouforchoosingtheExtechDissolvedOxygen/TemperatureMeterwhichsimultaneously
displaysDissolvedOxygenandTemperatureorOxygeninairandTemperature.Unitsofmeasure
aremg/lforDissolvedOxygen,%forOxygeninair,andoC/oFfortemperature.Oxygenis
measuredwitharemotesensorthatalsocontainsathermistorformeasuringairtemperature.
Advancedfeaturesincludealtitudeand%saltcompensation,datahold,autoshutoff,and
Min/Maxrecording.
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MeterDescription
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1. Maindisplaydigitsformeasurementsandprogrammingvalues
2. Temperaturereading
3. Power/Escapebutton
4. Function/Hold/Uparrowbutton
5. Record/Enterbutton
6. Setting/Downarrowbutton
7. BatteryCompartment(onback)
8. Probeconnectingcable
9. Probe
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DO210-en-GB_v1.2 11/14
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GettingStarted
Note:Thedissolvedoxygenprobeassemblymaybeshippedfromthefactorydry.Ifthe
probedoesnotcontainelectrolytesolution,refertotheElectrolyteReplacementsection
belowforinformationonaddingtheelectrolytesolutionpriortoinitialuse.
FillingtheElectrolyteContainerPriortoInitialUse
1. Unscrewandremovetheelectrolytecontainerfromthetipof
theprobe.
2. Filltheelectrolytecontainerwithnewelectrolyte.
3. Screwtheelectrolytecontainerbackontotheelectrodeholder
andprobehandle.ExcessElectrolytemaybeforcedout
throughthethreads.Wipeclean.
4. Lightlytaptheprobetoremoveairbubbles.
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Calibration
Forfirsttimeuseorafterlongperiodsofnon‐use,calibratetheinstrumentusingtheprocedure
below.Theprocedureshouldbeperformedinanopen,well‐ventilatedarea.
1. Connecttheoxygenprobeplugtotheprobeinputsocket.
2. SwitchONthemeterbypressingthePower/ESCbutton.
3. Thelowerdisplayshouldindicatethe%O2unitsymbolandatemperaturevalue.
4. Theupperdisplaywillbeginfluctuating.Waitapproximately3minutesfortheupper
displaytostabilize.
5. PresstheHOLDbuttonandthedisplaywillshowtheHOLDicon.
6. PresstheRECbutton.Thedisplaywillshow"CAL"flashingandthemeterdisplaywill
begincountingdownfrom30tozero;themeterwillthendisplaytheENDicon.
7. Theupperdisplaywillshowavalueapproximately20.9or20.8(typicalconcentrationof
oxygeninair).
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DO210-en-GB_v1.2 11/14
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DissolvedOxygen(DO)Measurements
MeasurementPreparation
Beforetakingmeasurements,performthecalibrationdescribedaboveifnecessary.
TakingMeasurements
1. PressandholdtheFunctionbuttonforatleast2secondstochangefrom%O2tomg/Lor
frommg/Lto%O2.ForDOmeasurementsselectmg/L(milligramsperliter).
2. Immersetheprobeinthesolutionundertest.Foroptimumautomatictemperature
compensation,immersetheprobetoadepthofatleast4"(10cm).
3. Waituntilthedisplaystabilizes.
4. Thevelocityoftheliquidcomingintocontactwiththeprobemustbeatleast0.6to1
ft/min(0.2to0.3m/s).Ifthesolutionisstanding,stirthesolutionwiththeprobeoruse
anagitator.
5. Rinsetheprobewithcleanwateraftereachuseandcovertheprobeheadwiththe
probeheadprotectivecover.
OxygeninAir(%O2)Measurements
MeasurementPreparation
Beforetakingmeasurements,performthecalibrationdescribedearlierifnecessary.
TakingMeasurements
1. PressandholdtheFunctionbuttonforatleast2secondstochangefrommg/Lto%O2if
necessary.Foroxygeninairmeasurementsbesuretoselect%O2.
2. Holdtheprobeintheareaundertestandwaituntilthedisplaystabilizes.
TemperatureMeasurements
Thelowerdisplaywillindicatethetemperatureofameasuredsolutionorthetemperatureof
theair(dependingonwhattypeofmeasurementtheuserisperforming).Tochangethe
temperatureunitofmeasureoC/oFfollowtheprocedurebeloworrefertotheSettingsmode
section:
PressandholdtheSettingbuttonfor5seconds(untilabeepisheard)toaccessthe
Settingmode
PresstheSettingbuttonmomentarilytwomoretimes
UsetheUParrowbuttontoselectoCoroFtemperatureunits
PressENTERtosavethesettingandpressESCtoreturntothenormalmodeofoperation
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DataHold
PresstheHoldkeytofreezethedisplayedvalue.TheLCDwilldisplayHOLDalongwiththeheld
reading.PresstheHoldkeyagaintoreleasethedataholdfunction.
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DO210-en-GB_v1.2 11/14
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MIN/MAXDataRecording
Whenselected,theDataRecordingfunctionrecordstheMin/Maxreadings.Tostartadata
recordingsession:
1. PresstheRECbuttononce.TheRECindicatorwillappearonthedisplay.PresstheREC
buttonagainandRECMAXwilldisplayonthescreenalongwiththemaximumvalue.
2. PresstheRECbuttonagainandthedisplaywillshowRECMINandtheminimumvaluewill
bedisplayed.
3. ToreleasetheheldMAXorMINreading,presstheHOLDbuttonwhileeithertheRECMAX
orRECMINiconsarevisible;nowonlytheRECiconwillbevisible.Themeterisnow
continuingtomonitorthehighest(MAX)andlowest(MIN)readingsbutisdisplayingreal
timemeasurements.ToviewtheMAXandMINvaluesagainusetheRECbuttonas
describedearlier.
4. ToexittheRecordmode,pressandholdtheRECbuttonforatleast2seconds.Thedisplay
willreturntothenormaloperatingmode.
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SettingsMode
BeforeaccessingtheSettingsmodeensurethatthemeterisnotintheHOLDorMIN/MAX
Recordingmodes.TousetheSettingsmode:
1. PressandholdtheSETTINGbuttonforatleast5seconds(untilabeepisheard)
2. UsetheSETTINGbuttontoscrollthroughtheSettingsoptionsTheoptionsare:
HIGH Altitudecompensationadjustment
SALt  %Saltadjustment
°C/°F Temperatureunitselection
OFF  Autopoweroffmanagement
3. RefertothefollowingsectionsfordetailedinstructionsonprogrammingtheSetting
modeparameters
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DO210-en-GB_v1.2 11/14
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AltitudeCompensationAdjustment(HIGH)
Ifthemeasurementenvironmentisnotatsealevelthealtitude(HIGH)valuemustbe
adjustedasdescribedbelow:
1. PressandholdtheSettingsbuttonfor5seconds(untilabeepisheard);themeter
willthendisplaythewordHIGHonthelowerleftandthealtitudecompensation
valueintheupperLCDareainlargerdigits
2. PressENTERandtheHIGHsymbolwillflash
3. Usethe▲and▼buttonstosetthedesiredaltitudecompensationinmeters
4. AfterselectingthedesiredvaluepressENTERtosaveandtosteptotheSalt
compensationparameter(orpressESCtoreturntothenormaloperatingmode)
5. Notethatthealtitudecompensationcanbeadjustedfrom0to3900meters;when
themeterispoweredOFFthevaluewillrevertto0meters(sealevel)
%SaltAdjustment
1. ContinuingfromtheprevioussectionintheSettingsmode:WhentheLCDshowsSALt
atthelowerleft,presstheENTERbutton
2. TheSALtsymbolwillflashandthedisplaywillshowthesaltcompensationvalueon
theupper,largeLCDdigits
3. Usethe▲ and▼ buttonstoadjustthedisplaytothedesired%SALtvalue
4. PressENTERtosavethedataandtosteptothenextparameter(orpressESCto
returntothenormalmodeofoperation)
5. The%saltvaluecanbeadjustedfrom0to39%salt(%weight).Whenthemeteris
poweredOFFthesaltvaluewillrevertto0%salt.
TemperatureUnitsSelection
ContinuingfromtheprevioussectionintheSettingsmode:
WhenoCoroFisdisplayed,pressthe▲buttontoselectthedesiredunits.PressENTERto
savetheselectionandtosteptothenextparameter(orpressESCtoreturntothenormal
modeofoperation).
AutoPowerOFFEnable/Disable
ContinuingfromtheprevioussectionintheSettingsmode:
WhenOFFYESorOFFNOisdisplayed,usethe▲buttontoselectYESorNO.
YES:AutopowerOFFenabled(meterwillautomaticallyswitchoffafter10minutesof
inactivity;NO:AutopowerOFFdisabled.
PressENTERtosavetheselectionandtoreturntothenormaloperatingmode.
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DO210-en-GB_v1.2 11/14
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BatteryReplacement
The9Vbatterythatpowerstheinstrumentrequiresreplacingwhenthebatteryiconflasheson
thedisplay.Toreplacethebatteryfollowthestepsbelow:
1. Disconnecttheprobefromtheinstrument.
2. OpentherearbatterycompartmentusingascrewdrivertoremovethetwoPhillipshead
screwsthatsecurethecompartment.
3. Carefullyremovetheoldbatteryfromthecompartmentlidchamberandgentlyunsnap
thebattery’sterminalsfromthewired(red/black)connectors.
4. Installanew9Vbatterybysnappingthebatteryterminalsontothewiredconnectors
(observingcorrectpolarity)andinsertingthebatteryintothecompartmentlidchamber.
5. Installthecompartmentlidchamberintothemeterhousingandsecurewiththetwo
screws.
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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.

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DO210-en-GB_v1.2 11/14
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ProbeHeadReplacement
Theprobehead(onthetipoftheprobe)holdsathinTeflon®membraneandanelectrolyte
container.Calibrationerrorsorreadingerrorscouldindicatelossofelectrolyteora
dirty/damagedmembrane.Themembraneisverydelicateandcaneasilybedamagedifit
comesincontactwithsolidobjects.ReplacementprobeheadsareavailablefromanExtech
distributor.
Replacementprocedure
1. Unscrewtheprobeheadandemptytheoldelectrolytefromthecontainer.
2. Fillthenewprobehead/electrolytecontainerwithelectrolyte.
3. Screwtheprobeheadontotheprobehandle.Excesselectrolytemaybeforcedoutthrough
thethreads.Wipeclean.
4. Lightlytaptheprobetoremoveanyairbubbles.
1. Probehandle
2. Temperaturesensor
3. ProbeHead

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DO210-en-GB_v1.2 11/14
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Specifications
GeneralSpecifications
CircuitCustomone‐chipLSImicroprocessorcircuit
DisplayDualfunctionLCD
MeasurementsDissolvedOxygen%O2ormg/l(milligramsperliter);Oxygen
inair:%;Temperature:°C/°F
DataholdDataholdkeyfreezesdisplayedreading
SensorStructureRemotePolarographicDissolvedOxygenSensor
Temperaturesensor:Precisionthermistor
DatarecordingMin/Maxmemoryandrecall
AutopoweroffMeterturnsoffafter10minutes(canbedisabled)
Samplerate1.0Second(approx.)
OperatingconditionsTemperature:0to50°C(32to122°F);Humidity:<80%RH
Batterypower9Valkalinebattery
PowerConsumptionApprox.6.2mADC
Weight446g(0.98lbs.)includingbatteries&probe
DimensionsMaininstrument:135x60x33mm(5.3x2.4x1.3")
Probe:190x28mm(7.5"x1.1")length/diameter

ElectricalSpecifications
MeasurementRangeResolutionAccuracy
DissolvedOxygen0.0‐20.0mg/L0.1mg/L+0.4mg/L
Oxygeninair0‐100%O20.1%O2+0.7%O2
Temperature
(probeonly)
32to122oF
0to50oC
0.1oF/C±1.5oF
+0.8oC
Compensation
adjustments
Temperature(automatic)0to50oC(32to122oF)
Salt0to39%
Altitude0to3900meters
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