YEO-KAL 620 User manual

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Yeo-Kal Electronics Pty Ltd 18/26 Wattle Road, Brookvale NSW Australia
Telephone [phone] Fax [phone]
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USERMANUAL
Model 620WaterQualityDataLogger
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Version 1.3
Date 1/5/2019
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InformationinthisdocumentisthecopyrightofYEO‐KALElectronicsPtyLtdandissubject
tochangewithoutnotice.Nopartofthisdocumentmaybecopiedorreproducedbyany
meanswithouttheexpresswrittenpermissionofYEO‐KALElectronicsPtyLtd.All
trademarksarethepropertyoftheirrespectivecompanies.
©2014Yeo‐KalElectronicsPtyLtd
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WARNINGS
DEPLOYMENTWARNING:
Alwaysremembertotightenthecaponthetopbeforedeploymentotherwisethemodel620is
notbewatertight!
EXPLOSIONWARNING:
Inaparticularcombinationofcircumstanceswheresaltwatercomesintocontactwithbatteries
anexplosionmayresult.Iftheprobeisdamageandwateringressispossibletheprobeshouldbe
keptdryandreturnedtoYeo‐KalElectronicstoberepaired.
SCREWCAPS:
When/ifdeployingtheprobewiththecabledisconnecteditisimportanttoinstallthescrewcap
onthetopconnector.Tightenfirmlyforo‐ringseal‐overtighteningwillnotimprovethesealand
mayweakenitandmakeithardtounscrew!
Iftheprobeisfittedwithauxiliarysensorsensurethecablefromtheexternalsensorisscrewed
tight.


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Contents
WARNINGS....................................................................................2
AVIATIONWARNING(FORLITHIUMIONBATTERIESONLY):ERROR!BOOKMARKNOTDEFINED.
CHARGINGWARNING:................................ERROR!BOOKMARKNOTDEFINED.
DEPLOYMENTWARNING:.........................................................................2
EXPLOSIONWARNING:.............................................................................2
SCREWCAPS:............................................................................................2
CONTENTS.....................................................................................3
INTRODUCTION.............................................................................6
GENERALDESCRIPTION..................................................................................6
SPECIFICATIONS............................................................................................6
Sensors:................................................................................................7
Temperature.........................................................................................7
Conductivity..........................................................................................7
Salinity..................................................................................................7
DissolvedOxygen..................................................................................7
Turbidity...............................................................................................7
pH.........................................................................................................8
ORP.......................................................................................................8
Depth(optional)...................................................................................8
Auxiliaryinputs.....................................................................................8
Physical.................................................................................................8
DESCRIPTIONOFSENSORS...............................................................................9
TemperatureSensor...........................................................................10
DissolvedOxygenSensor....................................................................10
ConductivitySensor............................................................................10
TurbiditySensor.................................................................................10
PH/ORPSensor...................................................................................11
pH‐Standardnon‐fillable:.................................................................11
pH‐Optionalrefillable:......................................................................11
AuxiliarySensors.................................................................................11
AuxiliarySensorElectricalCharacteristics:.........................................11
AuxiliarySensorwaterproofcap:.......................................................11
MAINTENANCE............................................................................12
D.O.SENSORMAINTENANCE........................................................................12
ChangingtheMembrane....................................................................12
DissolvedOxygenStirrerMaintenance..............................................13
PH/ORPSENSORMAINTENANCE...................................................................13
TURBIDITYSENSORMAINTENANCE.................................................................14
CONDUCTIVITYSENSORMAINTENANCE...........................................................14
BATTERY......................................................................................16

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NICKLEMETALHYDRIDEBATTERIES................................................................16
Howtocharge:.......................................Error!Bookmarknotdefined.
NickelMetalHydridebatterychargerstatusError!Bookmarknotdefined.
LITHIUMIONBATTERIES...............................................................................16
WARNINGS:........................................................................................16
Lithiumionbatteryspecification:...........Error!Bookmarknotdefined.
Description:............................................Error!Bookmarknotdefined.
Gettingtothebatterypack:...............................................................17
Howtocharge:.......................................Error!Bookmarknotdefined.
InstallBattery:....................................................................................17
CONNECTING...............................................................................19
CONNECTINGTOTHEPC...............................................................................19
COMMUNICATIONSPECIFICATION:..................................................................19
COMMUNICATIONSOFTWARE.......................................................................19
CHECKLOGGER:..........................................................................................20
SETLOGGER:..............................................................................................21
Enableisolation:.................................................................................21
Enablecyclicmemory:........................................................................21
Clearmemory:....................................................................................21
ArmLoggerbutton:............................................................................21
Disarmbutton:...................................................................................21
DOWNLOADDATA:.....................................................................................22
DownloadDatabutton:......................................................................22
Cancelbutton:....................................................................................22
REALTIME:................................................................................................23
Startbutton:.......................................................................................23
Stopbutton:.......................................................................................23
OutputRawData:...............................................................................23
EnableIsolation:.................................................................................23
CALIBRATION:.............................................................................................24
Parameterbutton:..............................................................................24
CalibrateLow/HighPoint:.................................................................24
Showlastdig:......................................................................................24
Hold:...................................................................................................24
CalibrateandSave:.............................................................................24
Cancel:................................................................................................24
Recalculate:........................................................................................24
SendCalibrationtoprobe:..................................................................24
ClearCalConst:...................................................................................25
ReloadCalConstants:.........................................................................25
StopProbe:.........................................................................................25
StartProbe:........................................................................................25
UploadCalConst:...............................................................................25
SaveCalConst:...................................................................................25
CALIBRATIONOVERVIEW..............................................................................25

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TemperatureCalibration....................................................................25
Salinity/HighConductivityRange(ms/cm)Calibration.......................26
LowConductivityRange(us/cm)Calibration......................................26
DissolvedOxygencalibration..............................................................27
pHCalibration.....................................................................................27
ORPCalibration..................................................................................27
TurbidityCalibration...........................................................................28
Depthcalibration................................................................................28
AuxiliaryChannelCalibration.............................................................28
LOGGERSETTINGS.......................................................................................29
Updateclockwhenarming:................................................................29
Realtimesamplerate:........................................................................29
Downloaddatainprocessed:.............................................................29
Lowbatteryshutoff:..........................................................................29
Batteryvoltagecalibration:................................................................29
Warmuptime:...................................................................................29
SensorCount:.....................................................................................29
SetAltitude:........................................................................................29
ADVANCEDSETTINGS:..................................................................................30
Edit>Commsportsetting:.................................................................30
Edit>WindowsDeviceManager:.......................................................30
Edit>ChannelDisplay/Precision/Chart:.............................................31
STORAGE.....................................................................................32
APPENDIX1‐CONVERSIONSUSED..............................................33
APPENDIX2‐COMPLIANCE.........................................................34


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Introduction
Themodel620comesalreadyassembled.Theonlyassemblyisconnectingtheloggertothebattery
chargerortothePCbycablesupplied.
GeneralDescription
Themodel620isafullysubmersiblewaterqualitydataloggerdesignedforunattended
deployment.Theunitisanidealtoolforlongtermdeploymentwhereaccuracyandreliabilityare
required‐canbeusedinawidevarietyofapplicationincludingwaterways,boreholes,sea,dams
andponds.ThemachinedPVCandstainlesssteelassemblymakesthisdataloggertoughand
durable.
Theinstrumentconsistsofamulti‐sensorprobewhichhasinternalmemoryandbatteriessoitcan
bothstoredataandoutputinrealtime.Communicationtoandfromtheprobeisinhalfduplex
serialwheredataistransferredtothePCusingserialcommunicationsgivingreliable,interference
freemeasurementsandalsocommandsaresenttotheloggerusingthesameinterface.Commands
sentanddatareceivedarehandledbytheaccompanyingPCWindows®software.Thecalibration
routineisalsohandledwiththesoftware.
Themodel620comeswithstoragecontainertoprotectthesensorswhiletheinstrumentisin
storage.
Specifications
Memory: Nonvolatilememoryforfullcapacityof20800samples.
ADCbits: 18bit
SampleRate: Loggingfrom1per10seconds
 Realtime:8sensors‐1persecondor12sensors1per2seconds(approximate
times)
Communications: Baudrate9600,8databits,Noparity,1stopbits(8‐N‐1)(baudof4800
 availableinsettings)
Power: Nickelmetalhydridepackwith4500mAHor
 Lithiumionbatterypackwithcapacityof3520mAH
Material: MachinedgreyPVCandstainlesssteel
Dimensions: 511mmX68mmdiameter.Suspensionbracketmakesdiameter82mm.
Weight: 2kg


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Sensors:
Temperature
Range: ‐2–50oC
Accuracy: ±0.05oC
Resolution: 0.01oC(0.001oCpossiblethroughsettings)
Type: pt100platinumelement
Conductivity
HighRange: 0‐80ms/cm(noteuselowrangeforlowvalues)
Accuracy: ±0.05ms/cm
Resolution: 0.02ms/cm
LowRange: 0‐8000us/cm
Accuracy: ±5us/cm
Resolution: 1us/cm
Type: Fourelectrodecell
Salinity
Range: 0‐60ppt
Accuracy: ±0.05ppt
Resolution: 0.02ppt
Type: SeeAppendix1‐ConversionsUsed
DissolvedOxygen
Range: 0‐200%saturation
 0‐20mg/l
Accuracy: ±0.5%
Resolution: 0.1%
Type: ActivesilverandleadelectrodesensorwithPTFE*membraneandbuilt‐in
stirrer
Turbidity
Range: 0‐600ntu
Accuracy: ±0.5ntu(0‐300nturange)
 ±5ntu(300‐600nturange)
Resolution: 0.3ntu
Type: Nephelometricmeasurementfroma90°sensorwithpulsedinfra‐redlight
source



pH
Range: 0‐14
Accuracy: ±0.03
Resolution: 0.01
Type: Combinationsilver/silverchloridetypewithsinteredTeflon*junction
ORP
Range: ‐700mVto+1100mV
Accuracy: ±10mV
Resolution: 1mV
Type: CombinationbaremetalelectrodecommonreferencejunctionwithpH
electrode(seeAppendix1‐ConversionsUsed)
Depth(optional)
Range: 0‐100mor
 0‐150m
Accuracy: ±0.5%offullscale
Resolution: 0.1m
Type: Dualactivesiliconestraingauge
Auxiliaryinputs
Input: 4X0‐5voltseachinput
Physical
Cablelength: 5m.Otherlengthsmadetoorder.



DescriptionofSensors
Theprobeassemblyconsistsofthepivotingsuspensionbracket,cableconnector,probebody,top
sensorhousing,slidingsensorguardandbottomsensorhousing.Thebodyoftheprobeismadeof
PVCwithaPVCsensorguard.
Thesensorscaneasilybeaccessedbyslidingthesensorguardupandrotatingthebottomsection
oftheprobe.
Theconductivityanddissolvedoxygensensorscanberemovedforservicing.However,thewhole
unitmustbethoroughlydrybeforethesesensorsareremovedtostrictlyavoidgettingmoisterin
thesockets.Acottonbudorpapertowelcanbeusedtodrythespacesinbetweenthesensors.


Expandedviewofsensorswithdissolvedoxygensensordetached.


TemperatureSensor
Thetemperaturesensorconsistsofapt100platinumelement,housedinastainlesssteelsheath
forrobustnessandcorrosionresistance.Thetemperaturesensorrequireslittlemaintenance,
howeverthetemperaturemeasurementisusedforcalculatingthedissolvedoxygeninmg/landfor
temperaturecorrectionoftheconductivitysensor,soitisimportantthatthetemperaturesensoris
properlycalibrated.
DissolvedOxygenSensor
DissolvedOxygenismeasuredusinganactivetypemembranecoveredsensor.Thesensoritself
consistsofsilverandleadelectrodesanda25umPTFEmembraneandisfilledwitha1.0M
potassiumhydroxide.Aconstantflowofwaterpassesthesensor,maintainedbyastirrerlocated
onthebottomsectionoftheprobe.
Whenthesilverandleadelectrodesareconnectedthroughtheexternalcircuit,electronspassfrom
theleadelectrodetothesilverelectrode.Whenoxygenispresentatthesurfaceofthesilver
electrode,itreactswithelectronstoproducehydroxylions.
Attheleadelectrodethelossofelectronsproducesleadions.Thelead'selectronscombinewith
hydroxyltoprecipitateleadhydroxideontheleadelectrode.
Therateoftransferenceofelectronsviatheexternalcircuitfromtheleadtosilverelectrodeiethat
isthecurrentflowingintheexternalcircuit,isthemeasureoftherateofcellreactionandthusthe
rateatwhichoxygenreachesthesilverelectrode.Thecurrentflowingintheexternalcircuitis
directlyrelatedtotheoxygenconcentrationinthesamplebeingmeasuredbytheelectrodes.
TheDissolvedOxygensensormayperiodicallyrequireanewmembraneandelectrolyte.Aunique
knurlednutisusedtoholdthesensormembraneinpositionwithoutoverstressingthemembrane.
Thisgiveslongtermstabilityandallowseasyreplacement.Thesensorcanberemovedfromthe
probeforservicing.Areplacementprobeisreadyforuseimmediatelyafterinstallationand
calibration.
ConductivitySensor
Theconductivityismeasuredusinga4electrodebridge.Thefourelectrodesystemusesautomatic
compensationtoovercomeanybuildupofcontaminationontheelectrodes.Theelectrodesare
madefromfineplatinumandarecoatedwithplatinumblacktoenhancethelongtermstabilityand
sensitivityofthesensor.Thecoatingshouldlastforalongperiodoftimeifitisnotmechanically
removed,however,thecoatingcanbereplacedbyreturningthesensortoYEO‐KALElectronicsPty
Ltd.
TurbiditySensor
Theturbiditysensorislocatedintheholewhichrunsthroughthebottomsectionoftheprobeand
islinedwithaglasstube.Turbidityismeasuredbythenephelometricmethodwhichusesalight
sourceandadetectormeasuringthelightscatteredat90degreestotheincidentlightbeam.A
pulsedinfra‐redlightsourceisused.ATurbidityscreenhasalsobeeninstalledwhichhasapertures
toreducebounceofftheglasswallandremoverefractionfromsampleshighdensity(seawater).



PH/ORPSensor
ThepHandoxidationreductionpotential(ORP)aremeasuredusingseparatepHsensorandbare
metalplatinumelectrodeforORP.TheybothshareaninternalreferenceelectrodeinthepH
sensor.
pH‐Standardnon‐fillable:ThesepHsensorsrequiretheleastmaintenance,onlytobestoredclean
3MOLKCL.Theirdesignisadoublejunctiontypetoprotecttheprimaryjunctionfromdilutionand
contamination.
pH‐Optionalrefillable:TheseoptionalpHsensorshavearefillable
secondaryjunctionforsensormaintenance.Astheelectrolytehas
ahigherflowitrequiresregularelectrolytetopupandcalibration.
Thistypeofsensorisfasterinrespondingandhelpscombat
accumulationofinternalcontamination.






AuxiliarySensors
Theprobewouldbefittedwithanexpansionhousingusuallyfeaturinganexternalsensorclamp
andbulkheadconnectorforpowerandcommunications/sensorvoltage.
AuxiliarySensorElectricalCharacteristics:Signalvoltagerequiredis0to5volts.Theoutput
voltagecaneitherbewiredforbatteryvoltage(7‐8.4V)or5voltsregulated.
AuxiliarySensorwaterproofcap:Iftheexternalsensorisremoveditisimportanttousethe
suppliedscrewcapwhichwillkeepwateroutoftheconnector.



Maintenance
D.O.SensorMaintenance
Tomaintaintheperformanceandaccuracyofthedissolvedoxygensensor,themembraneshould
alsobereplacedifitbecomesdamagedorcontaminatedwithorganicmatter.Cleanthemembrane
withcottonwoolsaturatedwithalcohol
ChangingtheMembrane
Tochangethemembrane,performthefollowingsteps,refertofigure5.
1. Removethedissolvedoxygensensorfromtheprobe.Todothis,liftthesensorguardand
rotatethebottomsectionoftheprobetoexposethesensors.Ensurethattheprobeand
sensorsarecompletelydry.Useacottonbudorpapertoweltodrytheareabetweenthe
sensors.Usingaflatscrewdriver,leverthedissolvedoxygensensoroutoftheprobe.
2. Withthesensorremoved,unscrewtheretainingringandremovetheoldmembrane.
3. ChecktheO‐ringanddiscardifitisdamagedthenflushouttheoldelectrolytewithdistilled
water.
4. Torefillwithelectrolyte(1.0MKOH),holdtheprobeverticalandplacethenozzleofthe
squeezebottleaboveandbesidethesilverelectrode.Squeezethebottletofilltheprobe
withelectrolyteuntilitflowsoverthetopofthesensor.
5. Besurethattherearenobubblesinsidethesensor.Tappingthesideofthesensor(witha
ruler)canhelpdislodgeanytrappedbubbles.
6. Againaddmoreelectrolytetoformameniscus.
7. Takeanewmembraneinhandandcentraliseitontopoftheelectrodeandletitfloaton
thesurface.
8. Placetheretainingnutoverthemembraneandscrewdownfirmlysothatthemembraneis
welltensioned.
9. Checkthattherearenobubblesintheelectrolyte.Ifbubblesarefound,repeattheabove
procedurefromstep5.
10. ApplyasmearofO‐ringgreasetotheo‐ringofthesensorandpushitbackintotheprobe.
Besurenottodamagethemembraneandbesuretopushthesensorinuntilitcannotgo
anyfurther.

Figure5:Explodedviewofdissolvedoxygen
sensor.


11. Waitatleast2hoursforthesensortostabilisethenrecalibratethedissolvedoxygen
readings.Thisstepisvitalastheoxygeninsidethesensorneedstobefullyusedbeforea
readingcanbetaken.
DissolvedOxygenStirrerMaintenance
TheStirrerforthedissolvedoxygensensorisamagneticallyoperatedpaddlewhichoscillatesand
forceswaterpastthesensormembrane.Thisstirrermayoccasionallybecomeclogged,particularly
ifthewateryouaretestingcontainsalargeamountofmagneticparticles.Toremovethestirrer
paddleforcleaning,proceedasfollows:
1. Liftthewireclipoffthepostandpushtotheoppositeside.
2. Againliftthewireclipandrotatethepaddletowardsyousotheclipmaypassby.Asmall
blackspacerwillbedislodgedandwillneedtoberetainedforreassembly.
3. Pullthewireclipout.Asthishappensthestirrerandtheoppositesmallblackspacerwill
comefree.
4. Cleanthepaddleandreplaceitinthereverseorder.
pH/ORPSensorMaintenance
Beforeuse:
 Alwaysremembertoremovetheprotectorcap(creamincolour).
 Electrochemicalsensorschangeovertimesocalibrationbeforefieldusewillprovidethe
bestaccuracy.
Afteruse:
 Alwaysrinsetheprobeandsensorsofdirt,debrisandsampleliquid.
 Replaceprotectorcap(creamincolour)filledwithabitofphprobekeeper.
Standardnon‐refillablesensor:Thissensorsrequiresmaintenanceifthereisabuildupof
contaminationontheglassmembrane.Acleandamppapertowelcarefullywipedovertheglass
willcleanthissensorsglassmembrane.Iftheelectrolytebecomescontaminatedordepletedof
electrolytethesensorwillrequirereplacement.
Optionalrefillable:Thisoptionalsensortypehasarefillablesecondaryjunction.Alsoasthe
electrolytehasahigherflowrateitrequiresregularelectrolytetopupandcalibration.Byrefilling
theelectrolytefromthebottomthiswilldisplacetheoldelectrolytewhichwillhelpslow
contaminationfromoccurring.
Warning:Abrasivedamage(includingscratches)tothepHglasswillreducethesensor
performance.
Theabovemaintenanceisrecommendedpriortocalibration.Followa2pointcalibration
procedureforyourwaterqualityanalyser.Insomecleancircumstancesitisfeasibletocalibrate
withoutmaintenance.Aprolongedperiodofnomaintenancewillaffectthereferenceandmay
causethecentreoffsettodrift–meaningmidvaluesmayreadhighorlow.
Storing
DonotstorepHsensorinwaterasitwilldepletetheions.
DonotletthepHsensordryup.
Alwaysrinseofcontaminatesandstoreclean.


EnsurethereissomepHprobekeeperintheprotectorcapbeforereplacingonthephsensor.
TurbiditySensorMaintenance
Theturbiditysensorrequireslittlemaintenanceexceptensuringthattheturbidityscreen(ablack
acetylopticalscreen)bekeptfreeofaccumulatedgritandmudandeverysooftenitshouldbe
removedandcleaned.Theglasstubeshouldalsobecleanedwithadamppapertowelorasmall
bottlebrush.Recalibrationofthissensoraftercleaningisrequired.
Removingthescreenisachievedbyunscrewingthetworetainingscrewsatthebottomofthe
probe,situatedontheflange.Pulltheblackscreenoutandwashitandalsocleantheglasstube.
Reinsertthescreenanddoupthetworetainingscrews–anorientationmarkexistswhichshould
facethecentreoftheprobe.
ConductivitySensorMaintenance
Tomaintaintheperformanceandaccuracyoftheconductivity/salinitysensor,theelectrodesneed
tobeperiodicallycleanedandiftheplatinumblackcoatingisdamaged,theelectrodeswillneedto
bere‐platinised.
Inspectthesensoronaregularbasis.Ifthereisanyevidenceofabuildupofcontaminationonthe
electrodes,thenthesensorshouldberemovedandcleanedusingtheplatiniserunitasdescribed
below.Iftheplatinumblackcoatingisdamaged,theelectrodesshouldbecleanedandthenre‐
platinised.Toperformtheseoperations,proceedasfollows:
1. Toremovethesensor,liftthesensorguardandrotatethebottomsectionoftheprobeto
exposethesensors.Ensurethattheprobeandsensorsarecompletelydry.Useacotton
budtodrytheareabetweenthesensors.Pulltheconductivitysensordownoutofthe
probebyhand.Donottwistthesensor.Ensurethatthevacantsensorsocketiskept
completelydry.
2. Tocleantheelectrodes,plugthesensorintotheplatiniserunit.Connecttheunittoa6V
powersupply(suchasalanternbattery).Filltheplatiniserwith0.1MHClandswitchonthe
platiniserfor5minutes.Switchofftheplatiniserandrinsewithdistilledwater.Nowinspect
theelectrodes.Iftheplatinumblackcoatingisintact,replacethesensorintheprobe
assemblyasdescribedinstep5below.Iftheelectrodesneedtobere‐platinised,proceed
asfollows.
3. Tostriptheoldplatinumblackcoatingfromtheelectrodes,plugthesensorintothe
platiniserunitfillwith5MHCl.Connecttheunittoa6Vpowersupplyandswitchtheunit
on.Theoldplatinumblackwillbestrippedofftheelectrodes.Oncecompleted,switchthe
platiniseroffandrinsewithdistilledwater.
4. Toreplacetheelectrodecoating,plugthesensorintotheplatiniserunitandconnecttoa
6Vpowersupply.Tomaketheplatinisingsolution,mix3gofchloroplatinicacidwith0.3gof
leadacetateandtopupto100mlwithdistilledwater.Filltheplatiniserwithplatinising
solutionandswitchtheunitonfor10minutes.Theelectrodeswillbeplatedwithasooty
blackcoating.Whencomplete,rinsetheunitandelectrodeswithdistilledwaterthenfill
theunitwith0.1MHClandswitchonfor2minutestoremoveanyoccludedplatinumblack
solutionremainingontheelectrodes.Rinsethesensorandplatiniserwithdistilledwater
andinstallthesensorintheprobeassembly.
5. Beforeinstallingtheconductivitysensorintotheprobeassembly,makesurethatboththe
sensorandprobeassemblyaredry.Applyasmearofvacuumgreasetothesensorbodyto


ensurethatawatertightsealisachieved.Thesensorcanonlybeinstalledwiththe
connectorpinsaligned.Alignthesensorandpushitintotheprobeassembly.Besureto
recalibratethesalinityandlowconductivity.



Battery
AlkalineBatteries6offCsize
ThebatteryvoltagemaybecheckedinthesoftwarebypressingtheCheckLoggerbutton.The
nominalbatteryvoltageis9.0voltshowevertheactualvoltagewillrangefrom9.6voltsdowntothe
cutoffof7.5volts.
Itisimportanttonotethatthesebatterieshaveaself‐dischargeeffectandalsouselessthan1ma
ofcurrentwhenstored.Thebatterieswilllastatleast6monthswhileconnected.Howeverifthe
unitisgoingtostoredforlongperiodsdisconnectthebattery.

BatteryLifeforvariousloggingsamplerates
Whenloggerisfittedwithfreshbatteries
For6AHBatteryas6000*60=360000mAMins
1min1sample;realtime
80mA\6000*60/80=4500samples
1sampleperday 6months
1sampleperhour 6months
2samplesperhour 3months
3samplesperhour 2months
4samplesperhour 1month

AlkalineBatteries
WARNINGS:
Allcareshouldbetakenwhenremovingbatteries
Shortcircuiting:Ensurethebatterypackcannotshortcircuit.Batteriesaredangerouswhenunder
shortcircuit.
Peirceorpuncture:Thebatteriesaredangerousifpiercedorpunctured.
Overtightening:Thiswillmakeitdifficulttounscrewandisnotnecessaryforagoodo‐ringseal!
Undertightening:Iftoolooseandnosealthentheprobewillbeflooded.


Crossthreading:Ensurethreadiscorrectlyengagedbeforescrewingtight.Ifnotcorrectlyengaged
thethreadwillbecrossthreadedanddamaged.
Connectors:Connectorwiresaresmallandcanbedamaged.Alwayspulltheconnectorapartby
holdingtheconnectornotthewires.
ThebatteryvoltagemaybecheckedinthesoftwarebypressingtheCheckLoggerbutton.The
nominalbatteryvoltageis9.0voltshowevertheactualvoltagewillrangefrom9.6voltsdowntothe
cutoffof7.5volts.
Thebatterychemistryisalkalinewhichhavesomespecificqualities
 Whennotusingtheprobedisconnectthebattery.6monthslifewhenconnected
 Donotleavedischargedbatteriesinstalledinloggerforextendedperiods
Gettingtothebatterypack:
1. Removecablefromtopconnector.
2. CAREFULLYUNSCREWtopofprobeexposingconnectorsforbattery,mainpowerforprobe
andcommunication.Internalwiresaresmallandwillnotsupporttheweightoftheprobe
ortophousing.



3. Trackwiresfrombatteryandcarefullydisconnectattheconnector.Pulltheconnector
apartwhenholdingtheconnectornotthewires.
4. Atthispointthebatterypackcanbepulledoutandswapped
5. InstallBattery:
1. Collect/bundlewiresfrominsideprobecavitytogether.
2. Pushbatterypackintocavityguidingtheprobewirestoonesideofthebatterypack.
3. Pushconnectorfrombatterypackdownonesidebetweenthebatteryandthecavitywall
togetitoutoftheway.
4. Pushtopcoverintopositionandscrewroundknurlednutdown
5. Itisagoodideatorotatecounterclockwisetillthethreadgetstothestartofthethread
(canbeasmallclickfeltorheard).Rotateintheclockwisedirectiontotightenthread.


Ensurethreadisengagedtoavoiddamagefromcrossthreading.Ifthethreadbecomes
tightjustasengagingthenunscrewtoavoiddamageandretry.
6. Thereare2o‐ringsealsinthisconnection.Theamountoftorsionrequiredtocorrectly
tightenistillthetopandprobebodyareflush.Notloosebutjustbitmore!



Connecting
Themodel620willcommunicatewiththePCwiththecommunicationsoftware,howeverithasa
numberofcommandswhichbeusedtocreateanonstandard/customizeddeployment.
ConnectingtothePC
ConnecttheUSBadaptertotheWindowsPC.Ifavailable,adriverwillbeactivatedandaCOMS
(communication)portnumberwillbeassigned.Ifadriverinstallationisrequiredancomputer
administratorisrequiredtoinstallthedriver.Thedrivercanbedownloadedfrom
www.yeokal.com.au>Manual/Downloads>Drivers&Software>ProlificUSBAdapterDriver.
http://yeokal.com.au/downloads/software/PL2303_Prolific_DriverInstaller_v110.exe
Note:EachUSBportassignsadifferentCOMSportnumber.
Connectthecommunicationcabletotheprobeandtightentheknurledring(nottootightly!).
ConnecttheotherendtotheUSBadapterintothecomputer.
Communicationspecification:
Baud: 9600
Databits: 8
Parity: N
Stopbits: 1
Advancedcommandlistavailableonapplication.
CommunicationSoftware
OncetheUSBdriverisinstalled,startthecommunicationsoftwareYKSmartComms.YKSmart
Commsisaprogramthatwillrunfromthesinglefile(noinstallationisnecessary)whichisbest
copiedandrunfromtheDesktop.ItisnotrecommendedtorunfromtheCDorflashdriveasthe
softwaresavessettingstothecomputerandrequiresawritabledestination.
WhenthesoftwarestartsandtheUSBcableisconnected;theCOMSportwillbeautomatically
selectedandopenedandthereadytocommunicatewiththe620.



CheckLogger:

Presscheckloggerbuttontocheckbatteryandthestatusofthe620.
