Specifications
©2015–2022OnsetComputerCorporation.Allrightsreserved.Onset,HOBO,HOBOconnect,andHOBOlinkareregisteredtrademarksof
OnsetComputerCorporation.AppStore,iPhone,iPad,andiPadOSareservicemarksorregisteredtrademarksofAppleInc.Androidand
GooglePlayaretrademarksofGoogleLLC.WindowsisaregisteredtrademarkofMicrosoftCorporation.BluetoothandBluetoothSmart
areregisteredtrademarksofBluetoothSIG,Inc.Allothertrademarksarethepropertyoftheirrespectivecompanies.
Patent#:8,860,569
26456‐A
1‐508‐759‐9500(U.S.andInternational)
1‐800‐LOGGERS(564‐4377)(U.S.only)
www.onsetcomp.com/support/contact
Maintenance
Tocleanthesoilmoisturesensorandneedles,useamild
detergent,suchasliquiddishsoap,andanonabrasivesponge
orcloth.Avoiddetergentsthatcontainlotionsormoisturizers.
Rinsethesensorandneedlesthoroughlywithtapordeionized
(DI)water.The logger is designed for outdoor use, but should be
inspected periodically. Wipe off any dust or grime with a damp
cloth.
Troubleshooting
Ifthesoilmoisturesensorreadingsaretooloworslightly
negative,checkforairgapsaroundthesensorneedles.These
couldbeproducedbelowthesurfaceofthesubstratewhenthe
needlecontactsalargepieceofmaterialandpushesitoutof
theway,orifthesensoris
notinsertedperfectlylinearly.
Ifthesensorreadingsaretoohigh,make surethemediawas
notpackedexcessivelyorinsufficientlyduringsensor
installation.Higherdensitycancausethesensorreadingstobe
elevated.
BatteryInformation
Theloggerrequiresoneuser‐replaceable2/3AA3.6Vlithium
battery(HRB‐2/3AA).Batterylifeis2years,typicalwitha
loggingintervalof1minute,butmaybeextendedto5years
whentheloggerisconfiguredwithBluetoothAlwaysOn
disabled.Expectedbatterylifevariesbasedon
theambient
temperaturewheretheloggerisdeployed,theloggingor
samplinginterval,frequencyofoffloadingandconnectingto
themobiledevice,numberofchannelsthatareactive,anduse
ofburstmodeorstatisticslogging.Deploymentsinextremely
coldorhottemperaturesorloggingintervalfasterthan1
minutecanimpactbatterylife.Estimatesarenotguaranteed
duetouncertaintiesininitialbatteryconditionsandoperating
environment.
BatteryReplacement
1. UseaPhillips‐headscrewdrivertounscrewthefour
screwsfromthebackofthelogger.
2. Carefullyseparatethetopandbottomofthelogger
enclosure.
3. Removetheoldbatteryandinsertthenewbattery
observingpolarity.Itisrecommendedthatyou
replacethedesiccant(DESICCANT2)whenreplacing
thebattery.
4. Makesuretherubbersealiscleanandfreeofany
debrisandthencarefullyreassemblethelogger
enclosureandscrewinthefourscrews.
WARNING:Donotcutopen,incinerate,heatabove85°C(185°F),
orrechargethelithiumbattery.Thebatterymayexplodeiftheloggeris
exposedtoextremeheatorconditionsthatcoulddamageordestroy
thebatterycase.Donotdisposeoftheloggerorbatteryinfire.Donot
exposethecontentsofthebatterytowater.Disposeofthebattery
accordingtolocalregulationsforlithiumbatteries.
FederalCommunicationCommissionInterferenceStatement
ThisequipmenthasbeentestedandfoundtocomplywiththelimitsforaClassBdigitaldevice,pursuanttoPart15oftheFCCRules.Theselimitsaredesignedtoprovide
reasonableprotectionagainstharmfulinterferenceinaresidentialinstallation.Thisequipmentgeneratesusesand
canradiateradiofrequencyenergyand,ifnotinstalledand
usedinaccordancewiththeinstructions,maycauseharmfulinterferencetoradiocommunications.However,thereisnoguaranteethatinterferencewillnotoccurina
particularinstallation.Ifthisequipmentdoescauseharmfulinterferencetoradioortelevisionreception,which
canbedeterminedbyturningtheequipmentoffandon,theuser
isencouragedtotrytocorrecttheinterferencebyoneofthefollowingmeasures:
Reorientorrelocatethereceivingantenna
Increasetheseparationbetweentheequipmentandreceiver
Connecttheequipmentintoanoutletona
circuitdifferentfromthattowhichthereceiverisconnected
Consultthedealeroranexperiencedradio/TVtechnicianforhelp
ThisdevicecomplieswithPart15oftheFCCRules.Operationissubjecttothefollowingtwoconditions:(1)Thisdevicemaynotcauseharmfulinterference,and(2)this
device
mustacceptanyinterferencereceived,includinginterferencethatmaycauseundesiredoperation.
FCCCaution:Anychangesormodificationsnotexpresslyapprovedbythepartyresponsibleforcompliancecouldvoidtheuser'sauthoritytooperatethisequipment.
IndustryCanadaStatements
ThisdevicecomplieswithIndustryCanadalicense‐exemptRSSstandard(s).Operation
issubjecttothefollowingtwoconditions:(1)thisdevicemaynotcauseinterference,and
(2)thisdevicemustacceptanyinterference,includinginterferencethatmaycauseundesiredoperationofthedevice.
Avisdeconformitépourl’IndustrieCanada
LeprésentappareilestconformeauxCNRd'IndustrieCanadaapplicablesauxappareils
radioexemptsdelicence.L'exploitationestautoriséeauxdeuxconditionssuivantes:(1)
l'appareilnedoitpasproduiredebrouillage,et(2)l'appareildoitacceptertoutbrouillageradioélectriquesubi,mêmesilebrouillageestsusceptibled'encompromettrele
fonctionnement.TocomplywithFCCandIndustryCanadaRFradiationexposurelimitsfor
generalpopulation,theloggermustbeinstalledtoprovideaseparationdistanceofat
least20cmfromallpersonsandmustnotbeco‐locatedoroperatinginconjunctionwithanyotherantennaortransmitter.
Unscrewthesefour
screwstoreplace
thebattery