Onset HOBO MX CO2 Logger User manual

HOBO®MXCO2Logger(MX1102A)Manual
22504‐D
TheHOBOMXCO2dataloggerrecordscarbondioxide,temperature,andrelativehumidity(RH)
datainindoorenvironmentsusingnon‐dispersiveinfrared(NDIR)self‐calibratingCO2sensor
technologyandintegratedtemperatureandRHsensors.ThisBluetooth®LowEnergy‐enabled
loggerisdesignedforwirelesscommunicationwithamobiledeviceandalsosupportsaUSB
connection.UsingtheHOBOmobile®orHOBOconnect®apponyourphoneortabletor
HOBOware®softwareonyourcomputer,youcaneasilyconfigurethelogger,readitout,andview
plotteddata.Theloggercancalculateminimum,maximum,average,andstandarddeviation
statisticsandcanbeconfiguredtotripaudibleorvisualalarmsatthresholdsyouspecify.In
addition,itsupportsburstlogginginwhichdataisloggedatadifferentintervalwhensensor
readingsareaboveorbelowcertainlimits.Thisloggeralsohasabuilt‐inLCDscreentodisplaythe
currentCO2level,temperature,RH,loggingstatus,batteryuse,memoryconsumption,andmore.
Specifications
TemperatureSensor
Range0°to50°C(32°to122°F)
Accuracy±0.21°Cfrom0°to50°C(±0.38°Ffrom32°to122°F),seePlotA
Resolution0.024°Cat25°C(0.04°Fat77°F),seePlotA
Drift<0.1°C(0.18°F)peryear
RHSensor*
Range1%to90%RH(non‐condensing)
Accuracy±2%from20%to80%typicaltoamaximumof±4.5%including
hysteresisat25°C(77°F);below20%andabove80%±6%typical
Resolution0.01%
Drift<1%peryeartypical
C
O2Sensor
Range0to5,000ppm
Accuracy±50ppm±5%ofreadingat25°C(77°F),lessthan90%RH(non‐
condensing)and1,013mbar
Warm‐upTime15seconds
CalibrationAutoormanualto400ppm
Non‐linearity<1%ofFS
PressureDependence0.13%ofreadingpermmHg(correctedviauserinputfor
elevation/altitude)
OperatingPressureRange950to1,050mbar(useAltitudeCompensationforoutsideofthis
range)
CompensatedPressure
Range
‐305to5,486m(‐1,000to18,000ft)
SensingMethodNon‐dispersiveinfrared(NDIR)absorption
ResponseTime
Temperature12minutesto90%inairflowof1m/s(2.2mph)
RH1minuteto90%inairflowof1m/s(2.2mph)
CO21minuteto90%inairflowof1m/s(2.2mph)
Logger
RadioPower1mW(0dBm)
TransmissionRangeApproximately30.5m(100ft)line‐of‐sight
WirelessDataStandardBluetoothLowEnergy(BluetoothSmart)
LoggerOperatingRange0°to50°C(32°to122°F);0to95%RH(non‐condensing)
*PerRHsensormanufacturerdatasheet
Note:TheHOBOU‐Shuttle(U‐DT‐1)isnotcompatiblewiththislogger.
HOBOMXCO2Logger
MX1102A
IncludedItems:
FourAA1.5Valkaline
batteries
RequiredItems:
Mobiledevicewith
Bluetoothand
HOBOmobileappfor
deviceswithiOSor
HOBOconnectappfor
deviceswithAndroid™
OR
HOBOware3.7.3orlater
andUSBcable
Accessories:
Mountingkitwith
mountingbrackets,screws,
tiewraps,andCommand™
strip



HOBOMXCO
2
DataLogger(MX1102A)Manual
1‐800‐LOGGERS2www.onsetcomp.com
Specifications(continued)
LoggingRate1secondto18hours
LoggingModesFixedinterval(normal,statistics)orburst
MemoryModesWrapwhenfullorstopwhenfull
StartModesImmediate,pushbutton,date&time,ornextinterval
StopModesWhenmemoryfull,pushbutton,date&time,orafterasetlogging
period
TimeAccuracy±1minutepermonthat25°C(77°F),seePlotB
PowerSource4AA1.5Voltbatteries(userreplaceable)orUSBpowersource(5V
DC,2Watts)
BatteryLife6months,typicalwithloggingandsamplingintervalsof5minutesor
slower;6monthsorlesswithloggingandsamplingintervalsfaster
than5minuteswhileloggingCO
2
.Enteringburstloggingmodewill
impactbatterylife.Withappuse,batterylifecanbereducedby
remainingconnected,excessivereadouts,audiblealarms,andpaging.
Visual/audiblealarmsandothereventscanhaveamarginalimpact
onbatterylife.
Memory128KB(84,650measurements,maximum)
DownloadTypeUSB2.0interfaceorviaBluetoothSmart
FullMemoryDownloadTime20secondsviaUSB;approximately60secondsviaBluetoothSmart,
maytakelongerthefurtherthedeviceisfromthelogger
LCDLCDisvisiblefrom0°to50°C(32°to122°F);theLCDmayreactslowly
orgoblankintemperaturesoutsidethisrange
Size7.62x12.95x4.78cm(3.0x5.1x1.88inches
Weight267.4g(9.43oz)
EnvironmentalRatingIP50

TheCEMarkingidentifiesthisproductascomplyingwithallrelevant
directivesintheEuropeanUnion(EU).
  Seelastpage
*PerRHsensormanufacturerdatasheet
Note:TheHOBOU‐Shuttle(U‐DT‐1)isnotcompatiblewiththislogger.



PlotA:Temperature
AccuracyandResolution
PlotB:TimeAccuracy

HOBOMXCO
2
DataLogger(MX1102A)Manual
1‐800‐LOGGERS3www.onsetcomp.com
LoggerComponentsandOperation

USBPort:Usethisporttoconnecttheloggertoacomputerfor
usewithHOBOwareortopowertheloggerforlonger
deploymentsoriffasterloggingintervalsarerequired.
Start/StopButton:Pressthisbuttonfor3secondstostartor
stoploggingdata,ortoresumeloggingonthenexteven
logginginterval.Thisrequiresconfiguringtheloggerwitha
pushbuttonstartorstop(seeChoosingLoggerSettings).You
canalsopressthisbuttonfor1secondtorecordaninternal
event(seeLoggerEvents),tosilenceabeepingalarm(see
SettingupAlarms),ortoturntheLCDscreenoniftheoptionto
turnofftheLCDhasbeenenabled(seeChoosingLogger
Settings).
PressboththeStart/StopbuttonandtheClear/Nextbutton
simultaneouslyfor3secondstoresetaloggerpassword.
Clear/NextButton:Pressthisbuttonfor1secondtoswitch
betweenstatistics,alarmreadings,andthecurrentsensor
readingsasapplicableortosilenceabeepingalarm.Pressthis
buttonfor3secondstoclearavisualalarmiftheloggerwas
configuredtomaintainthealarmuntilthebuttonispressed
(seeSettingupAlarms).
CalibrateButton:Pressthisbuttontostartafive‐minute
manualcalibrationprocessoftheCO
2
sensor.Thisrequires
configuringtheloggerwiththemanualcalibrationCO
2
sensor
settingenabledintheapporHOBOwareandbringingthe
loggerintoafreshairenvironment(seeCalibratingtheLogger).
TemperatureSensor:Thissensorislocatedtotherightofthe
LCDscreenbelowthelargeCO
2
sensor.
RHSensor:Thissensorislocatedbehindtheventedpanelin
theloggercasetotherightofthetemperaturesensor.
CO
2
Sensor:Thissensorislocatedbelowthelargevented
circularpaneltotherightoftheLCDscreen.
LCDScreen:ThisloggerisequippedwithanLCDscreenthat
displaysdetailsaboutthecurrentstatus.Theexampleshowsall
symbolsilluminatedontheLCDscreenfollowedbydefinitions
ofeachsymbolinthetable.

LCDSymbolDescription

TheloggerIscurrentlycommunicatingwith
HOBOmobileviaBluetooth.Themorebarsthere
are,thestrongertheBluetoothsignal.

Theloggeriscurrentlycommunicatingwith
HOBOwareviaUSBcable.
TheloggeriscurrentlybeingpoweredbyUSBcable.

Thebatteryindicatorshowstheapproximate
batterypowerremaining.

Theloggerhasbeenconfiguredtostoplogging
whenmemoryfills.Thememorybarindicatesthe
approximatespaceremainingintheloggerto
recorddata.Whenfirststarted,allfivesegments
inthebarwillbeempty.Inthisexample,the
loggermemoryisalmostfull(onlyonesegmentin
thememorybarisempty).

Theloggerhasbeenconfiguredtoneverstop
logging(wrapping).Theloggerwillcontinue
recordingdataindefinitely,withnewestdata
overwritingtheoldestdatauntilthebatteriesdie
ortheloggerisreconfigured.Whenfirstlaunched,
allfivesegmentsinthememorybarwillbeempty.
Inthisexample,thememoryisfull(allfive
segmentsarefilledin)andnewdataisnow
overwritingtheoldestdata.
Theloggeriscurrentlylogging.

Asensorreadingisaboveorbelowthehighorlow
alarmlimitthatyouconfigured.Pressandrelease
theClear/Nextbuttonuntilthe“alm”symbol
(describedlaterinthistable)isdisplayedonthe
screen.Thissymbolatleftwillcleardependingon
howalarmswereconfiguredtobeclearedinthe
software.Ifthealarmwassettoclearwhenthe
loggerisreconfiguredorrelaunched,thissymbol
willremainontheLCDuntilthenexttimethe
loggerisconfigured(seeSettingupAlarms).
Otherwise,itwillclearwhenthesensorreadingis
backwithinthealarmlimitsorbypressingthe
Clear/Nextbuttonfor3seconds.

Theloggeriswaitingtobestarted.Pressandhold
theStart/Stopbuttonfor3secondstostartthe
logger.

Theloggerhasbeenstartedwithpushbuttonstop
enabled;pressandholdtheStart/Stopbuttonfor
3secondstostopthelogger.

AnalarmdisplayedontheLCDisreadytobe
cleared.Thiswillonlyappeariftheloggerwas
configuredtomaintainthealarmuntilthe
Clear/Nextbuttonispressed(for3seconds).Note
thatanaudiblealarmcanbesilencedbypressing
theStart/StopbuttonorClear/Nextbuttonfor1
second.

Pressthisbuttontoviewthelateststatistics(if
enabled)orthesensorreadingassociatedwitha
trippedalarm.
Clear/NextButton
Start/StopButton
CO2Sensor
LCDScreen
RHSensor
Temperature
Sensor
CalibrateButton
USBPort

HOBOMXCO
2
DataLogger(MX1102A)Manual
1‐800‐LOGGERS4www.onsetcomp.com
LCDSymbolDescription

Pressthisbuttonfor5secondstomanually
calibratetheCO
2
sensor(ifenabled).“Calibrate”
and“CO
2
”willblinkontheLCDduringthe5‐
minutemanualcalibrationprocess.




Thesesymbolsshowthemaximum,minimum,
average,andstandarddeviationvaluesmost
recentlycalculatedbythelogger(ifenabled).
PresstheNext/Clearbuttonfor1secondtocycle
throughtheavailablestatisticsandthenbackto
thecurrentsensorreading(ortothealarmvalueif
applicable).

Thisisthefarthestout‐of‐rangesampledisplayed
duringtheloggerdeployment.Pressthe
Clear/Nextbuttontoviewthisreading.Pressthe
Clear/Nextbuttonagaintocyclethroughany
statistics(definedabove)andultimatelybackto
thecurrentsensorreading.

ThisisanexampleofaCO
2
readinginpartsper
million.Iftheloggerispoweredbybattery:Anew
segmentappearsinthestatusbarevery15
secondstoindicatehowlonguntilthedisplaywill
beupdated.Inthisexample,thereare18
segments.Thismeansithasbeen4minutesand
30secondssincetheCO
2
readingwasupdatedon
theLCD.Thereare30secondsleft(twosegments)
beforethereadingwillbeupdatedontheLCD.If
theloggerispoweredbyUSBcable:The
segmentedstatusbarisnotdisplayedandthe
currentreadingisupdatedeverysecond.

Thisisanexampleofatemperaturereading.
Temperatureunitsaredeterminedbythesettings
inthesoftware.ToswitchbetweenCelsiusand
Fahrenheit,changetheunitsinthesoftwareand
thenreconfigurethelogger.Temperaturereadings
areupdatedontheLCDevery15secondsifthe
loggerisbattery‐poweredoreverysecondifitis
USB‐poweredregardlessoflogginginterval.

ThisisanexampleofanRHreading.RHreadings
areupdatedontheLCDevery15secondsifthe
loggerisbattery‐poweredoreverysecondifitis
USB‐poweredregardlessoflogginginterval.

Theloggerhasbeenconfiguredtostartloggingon
aparticulardate/time.Thedisplaywillcountdown
indays,hours,minutes,andsecondsuntillogging
begins.Inthisexample,5minutesand38seconds
remainuntilloggingwillbegin.

Theconfiguresettingsarebeingloadedontothe
loggerfromthesoftware.

Anerroroccurredwhileloadingtheconfigure
settingsontotheloggerfromthesoftware.Try
reconfiguringthelogger.

Theloggerhasbeenstoppedwiththesoftwareor
becausethememoryisfull.
Notes:
YoucandisabletheLCDscreeninthesoftware.Whenthe
LCDisturnedoffforlogging,youcanstilltemporarily
viewtheLCDscreenbypushingtheStart/Stopor
Clear/Nextbutton.TheLCDwillthenremainonfor10
minutes.
Whentheloggerisconnectedtothecomputerwiththe
USBcable,theLCDscreenrefresheseverysecond
regardlessoflogginginterval.
Whentheloggerhasstoppedlogging,theLCDscreenwill
remainonwith“STOP”displayeduntiltheloggeris
offloaded(unlesstheLCDscreenwasturnedoffinthe
software).Oncetheloggerhasbeenoffloaded,theLCD
willturnoffautomaticallyafter2hours.
TheLCDscreenflashes“HELLO”whenyoupagethe
loggerfromtheapp(seeGettingStartedwiththeApp).
TheLCDscreenflashes“CHIRPOFF”whenanaudible
alarmiscleared.
SettinguptheLogger
Important:TheCO
2
sensorwithinthisloggercanexperience
measurementdriftduringstorageandshipment.Itisstrongly
recommendedthatamanualcalibrationbeperformedpriorto
deployingthelogger.Starttheloggerasdescribedinthis
sectionandperformamanualcalibration.SeeCalibratingthe
Loggerformoredetails;followthemanualcalibrationstepsin
thatsection.Impropermanualcalibrationcancauseincorrect
sensorreadings.
Installthebatteriesinthelogger.UseaPhillips‐head
screwdrivertoopenthebatterycoveronthebackofthelogger
andinsertfourAAbatteriesobservingpolarity(seeBattery
Information).Screwthecoverbackinplace.
YoucanuseboththeappandHOBOwaresoftwarewiththis
logger.Thefollowingsectionsprovideanoverviewforusingthe
loggerwithbothprograms.Youcanswitchbackandforth
betweenthetwoprograms(forexample,configurethelogger
inHOBOware,andreaditoutintheapp).However,youcan
onlyconnecttooneprogramatatime.Youcannotusetheapp
withtheloggerwhileitisconnectedtoHOBOware.Ifyou
attempttousetheloggerinHOBOwarewhileitisconnectedto
theapp,thedevicewillnotbefound.Ifyouwanttoconnectto
theappafterusingtheloggerwithHOBOware,youwillneedto
disconnecttheUSBcableonceyouaredonewithHOBOware.
GettingStartedwiththeApp
Thesestepsprovideanoverviewofsettinguptheloggerwith
theapp.
1. IfyouareusinganiPhone®oriPad®:Download
HOBOmobilefromtheAppStore®.
IfyouareusinganAndroidphoneortablet:Download
HOBOconnectfromGooglePlay™.
2. OpentheappandenableBluetoothinyourdevicesettings
ifprompted.
3. TaptheDevicesiconintheapp.(InHOBOmobile,tap
Loggersatthetopofthescreen.)Taptheloggerintheapp
toconnecttoit.
Iftheloggerdoesnotappearorifitishavingtrouble
connecting,followthesetips:
Makesuretheloggeriswithinrangeofyourmobile
device.Therangeforsuccessfulwirelesscommunication
isapproximately30.5m(100ft)withfullline‐of‐sight.
Ifyourdevicecanconnecttotheloggerintermittentlyor
losesitsconnection,moveclosertothelogger,within
sightifpossible.
IftheloggerappearsintheInRangelist,butyoucannot
connecttoit,closetheappandpowercyclethemobile
device.ThisforcesthepreviousBluetoothconnectionto
close.

HOBOMXCO
2
DataLogger(MX1102A)Manual
1‐800‐LOGGERS5www.onsetcomp.com
4. Onceconnected,tapConfigureinHOBOmobileortap
inHOBOconnect.
5. Chooseyourloggerconfigurationsettings.SeeChoosing
LoggerSettingsfordetailsontheavailablesettings.
6. TaptheCO
2
sensorandselectmanualand/orauto
calibration.SelectAltitudeCompensationandenterthe
altitudeaboveorbelowsealevel.TapDoneorSave.See
CalibratingtheLoggerformoredetailsoncalibration
settings.
7. TapStartintheupperrightcorneroftheConfigurescreen
inHOBOmobileortapinHOBOconnect.
Loggingwillbeginbasedonthesettingsyouselected.Deploy
theloggerusingtheincludedmountingmaterials(see
MountingtheLogger).Afterloggingbegins,youcanreadout
theloggeratanytime(seeReadingOuttheLoggerfordetails).
Note:Thesensorreadingsdisplayedwithintheappmaynot
matchwhatisdisplayedonthelogger.
Whenconnectedtothelogger,thefollowingactionsarealso
availableinadditiontoconfigure:
ReadoutinHOBOmobileorinHOBOconnect.
Offloadloggerdata.SeeReadingOuttheLogger.
FullStatusDetailsinHOBOmobileorin
HOBOconnect.Checkinformationaboutthelogger.In
HOBOconnect,accesssomeoftheactionsdescribedin
thissection.
StartLogginginHOBOmobileorandthenin
HOBOconnect.ThisoptionappearsifOnButtonPushis
selectedasaStartLoggingsettingasdescribedinthe
ChoosingLoggerSettings.
StopLogginginHOBOmobileor
andthenin
HOBOconnect.Stoptheloggerfromrecordingdata(this
overridesanyStopLoggingsettingsdescribedinChoosing
LoggerSettings).
PageinHOBOmobileorandthenin
HOBOconnect.Taptomaketheloggerbeeponetimeto
helpyoulocateit(pressandholdthePageiconin
HOBOmobiletocontinuebeeping).“HELLO”alsoappears
ontheLCDwhentheloggerispaged.
ClearAudibleAlarminHOBOmobileorandthen
inHOBOconnect.Ifaudiblealarmsareenabledas
describedinSettingupAlarms,usethistocleara
beepingalarmonthelogger.
LoggerPasswordinHOBOmobileorandthenin
HOBOconnect.Selectthistocreateapasswordforthe
loggerthatwillberequiredifanothermobiledevice
attemptstoconnecttoit.Toresetapassword,
simultaneouslypressboththeStart/Stopbuttonandthe
Clear/Nextbuttonfor3secondsortapResettoFactory
DefaultintheSetLoggerPasswordscreenin
HOBOmobileortapandtapResetinHOBOconnect..
UpdateFirmwareinHOBOmobileorandthenin
HOBOconnect.Whennewloggerfirmwareisavailable,
thisactionappearsinthelist.Selectitandfollowthe
instructionsonthescreen.Aloggerreadoutwillbe
completedautomaticallyatthebeginningofthe
firmwareupdateprocess.Iftheconnectionislost
betweentheloggerandthemobiledeviceduringthe
firmwareupdate,aFirmwareUpdatePendingStatus
displaysfortheloggerintheDeviceslist.Connecttothe
loggerandupdatethefirmwareagain(orselectRestore
LoggerifavailableinHOBOmobile).
Important:Beforeupdatingthefirmwareonthe
logger,checktheremainingbatterylevelbyselecting
FullStatusDetailsandmakesureitisnolessthan30%.
Makesureyouhavethetimetocompletetheentire
updateprocess,whichrequiresthattheloggerremains
connectedtothedeviceduringtheupgrade.
ForceOffload(HOBOmobileonly.Thismayappearifan
errorwasencounteredwhenloadingconfiguresettings.
Selectthistooffloadallthedataontheloggerbefore
reconfiguringthelogger.
GettingStartedwithHOBOware
Thesestepsprovideanoverviewofsettinguptheloggerwith
HOBOware.Forcompletedetails,seetheHOBOwareHelp.
1. InstallHOBOwareonyourcomputer.
2. ConnecttheloggertothecomputerwithaUSBcable.
Important:USB2.0specificationsdonotguaranteeoperation
outsidetherangeof0°C(32°F)to50°C(122°F).
3. FromthedevicemenuinHOBOware,selectLaunch.
4. Chooseyourloggersettings.SeeChoosingLoggerSettings
fordetailsontheavailablesettings.
5. ClicktheCO
2
Settingsbuttonandselectmanualand/orauto
calibration(bothareselectedbydefault).Select“Use
CarbonDioxidesensoraltitudecompensation”andenter
thealtitudeaboveorbelowsealevel.ClickOK.See
CalibratingtheLoggerformoredetailsoncalibration
settings.


HOBOMXCO2DataLogger(MX1102A)Manual
1‐800‐LOGGERS6www.onsetcomp.com
6. ClicktheStartbuttonwhenfinished.NotethattheStart
buttontextchangesbasedonyourStartLoggingselection.
Loggingwillbeginbasedonthesettingsyouselected.Deploy
theloggerusingtheincludedmountingmaterials(see
MountingtheLogger).Afterloggingbegins,youcanreadout
theloggeratanytime(seeReadingOuttheLoggerfordetails).
ChoosingLoggerSettings
Thefollowingtableliststheavailablesettingswhenconfiguring
theloggerwiththeapporHOBOware.
LoggerSettingAction
NameEnteranamefortheloggerupto20characters.
Thisnamewillbeusedasthefilename.Aname
alsohelpsidentifytheloggerintheLoggersscreen
intheapp.Ifnonameisentered,theloggerserial
numberisused.
Group(theapp
only)
Addtheloggertoagrouptohelpidentifythe
logger.
LoggingIntervalSelecthowoftentheloggerwillrecorddata.
StartLogging
Options
Chooseoneofthefollowing:
Now.Loggingwillbeginimmediatelyafter
configurationsettingsareloadedonthelogger.
OnNextLoggingInterval.Loggingwillbeginat
thenextevenintervalasdeterminedbythe
selectedlogginginterval.
OnButtonPush.Loggingwillbegin15seconds
afteryoupresstheStart/Stoploggingbuttonon
theloggerfor3seconds.
OnDate/Time.Loggingwillbeginatadateand
timeyouspecify.
StopLogging
Options
Chooseamemoryoption:
WhenMemoryFills.Theloggerwillcontinue
recordingdatauntilthememoryisfull.
Never(WrapWhenFull).Theloggerwill
continuerecordingdataindefinitely,with
newestdataoverwritingtheoldest.Thisoption
isnotavailableiftheLoggingModeissetto
Burst(seeBurstLogging).
Choosethisstoploggingoptionifdesired:
OnButtonPush.Selectthisifyouwanttobe
abletostoploggingbypushingtheStart/Stop
buttononthelogger.ForHOBOmobile:Note
thatifyoualsochooseOnButtonPushforthe
StartLoggingoption,thenyouwillnotbeable
tostoplogginguntil30secondsafterlogging
begins.
ChooseaStopLoggingtime‐basedoption.
Never.Selectthisifyoudonotwantthelogger
tostopatanypredeterminedtimeframe.
OnDate/Time.Selectthisifyouwantthelogger
tostoploggingonaspecificdateandtime.
Selectthedateandtime.InHOBOmobile,tap
Done.
After.Selectthisifyouwanttocontrolhow
longtheloggershouldcontinueloggingonceit
starts.Choosetheamountoftimeyouwantthe
loggertologdataandthentapDone.For
example,select30daysifyouwantthelogger
tologdatafor30daysafterloggingbegins.
LoggerSettingAction
LoggingModeChoosealoggingmode:
FixedLogging.Theloggerwillrecorddataforall
enabledsensorsattheselectedlogginginterval.
BurstLogging.Inburstmode,loggingoccursat
adifferentintervalwhenaspecifiedconditionis
met.SeeBurstLoggingformoreinformation.
Intheapp,selectNormalifyouwantthelogger
tologcurrentreadings.Selecteachstatisticyou
wanttheloggertolog.
InHOBOware,selectStatisticsandthenselect
CurrentReadingifyouwantsensorreadingsto
belogged.Selecteachstatisticyouwantthe
loggertolog.
Currentreadingsandstatisticsareloggedatthe
loggingintervalrate.SeeStatisticsLoggingfor
moreinformation.
ShowLCDEnableordisabletocontrolwhethertheLCD
remainsilluminatedwhiletheloggerislogging.If
youdisabletheLCD,theloggerwillnotshowthe
currentreading,status,orotherinformationwhile
theloggerislogging.Youwill,however,beableto
temporarilyturntheLCDscreenonbypressingthe
Start/Stopbuttonontheloggerfor1second.
Sensor&Alarm
Setup
Enablethesensormeasurementtypesthatwillbe
logged:temperature,RH,and/orCO2.Both
temperatureandRHarerequiredtocalculatedew
point,whichisanadditionaldataseriesavailable
forplottingafterreadingoutthelogger.Youcan
configurealarmsforsensors.SeeSettingup
Alarms.IfloggingCO2,youcanselectcalibration
settings.SeeCalibratingtheLogger.
CalibratingtheLogger
TheCO2sensorintheloggerrequiresaltitudecompensation
andregularcalibrationtoensureaccuratereadingsarebeing
takeninthelocationwhereitisdeployed.Bothautoand
manualcalibrationareselectedbydefaultwhenfirst
configuringthelogger.Altitudecompensationshouldbeusedif
youaremonitoringCO2atelevationsaboveorbelow305
meters(1,000feet).
SomeCO2measurementdriftmayoccurduringshipmentand
storage.Amanualcalibrationimmediatelyafterloggingbegins
isrecommendedforbestaccuracy.
Important:Ifperformingamanualcalibration,besuretofollow
theinstructionslaterinthissection.Impropermanual
calibrationcanresultinincorrectsensorreadings.
ThefollowingCO2settingsareavailableinboththeappand
HOBOware:
Manualcalibration.Manualcalibrationisthebestwayto
calibrateyourlogger.Usethisoptionifyouwantto
manuallycalibratetheloggerto400ppmusingthe
Calibratebuttononthelogger.Thisrequirestakingthe
loggeroutsideinfreshaironadrydayortoanindoor
locationthatisunoccupiedandhasnoconnectiontoa
ventilationsystemforfiveminutesonaregularbasis.
PresstheCalibratebuttonontheloggerfor5secondsto
manuallycalibratetheCO2sensor.“Calibrate”and“CO2”
willblinkontheLCDduringthe5‐minutemanual
calibrationprocessinwhich300measurementsaretaken

HOBOMXCO
2
DataLogger(MX1102A)Manual
1‐800‐LOGGERS7www.onsetcomp.com
togettheaverageandcreatetheoffsetfrom400ppm.
(Seethestepslaterinthissectionformoredetailson
manualcalibration.)Thisisrecommendediftheloggeris
deployedinabuildingthatisalwaysoccupied,ifyouwant
theloggertobecalibratedmorefrequentlythanevery
eightdays(thenormalautocalibrationschedule),orifyou
wanttocalibratetheloggerimmediatelyafterlogging
begins.Note:Onceamanualcalibrationisperformed,the
24‐hourautocalibrationiscanceledandanauto
calibrationwillbeperformedeightdaysfromthetimethe
manualcalibrationoccurred.
Autocalibration.Usethisoptionifyouwanttheloggerto
automaticallycalibratewithinthefirst24hoursafter
loggingbeginsandtheneveryeightdaysthereafter.The
loggerwillbecalibratedbasedontheaverageofthethree
CO
2
measurementsthatfollowthelowestCO
2
value
identifiedduringthe24‐houror8‐daytimeperiodas
applicable.
Important:Accurateauto‐calibrationrequiresthebuilding
orlocationwheretheloggerisdeployedtobeemptyat
leastonceduringtheeight‐dayperiod(forexample,an
emptyofficebuildingduringtheweekendorovernightwill
typicallyhavebackgroundCO
2
levelsof400to450ppm).
IftheloggerisdeployedinanareawheretheCO
2
level
doesnotgodownto400ppmduringtheeight‐daytime
period,thenmanualcalibrationshouldbeperformed
regularlyinsteadorinaccurateCO
2
readingswillbe
reported.IfyouplanonusingautocalibrationbuttheA
mabuildingwillbeoccupiedduringthefirstdayafter
loggingbegins,thenyoucanusethemanualcalibration
optionaswell.Youcanmanuallycalibratethelogger
immediatelyafterloggingbeginsanduseautocalibration
thereafter.Note:Everytimetheloggerisstarted,auto
calibrationwilloccurafter24hoursandthenagainafter
eightdaysunlessamanualcalibrationisperformedfirst.
Altitudecompensation.TheCO
2
sensormustcompensate
forlocationsaboveorbelow305meters(1,000feet)to
provideanaccuratereading.Youmustenterthealtitude
aboveorbelowsealevelineithermetersorfeetwhen
configuringtheloggerifitwillbedeployedatalocation
aboveorbelowsealevel.Innormaluse,theCO
2

measurementwillvarybyapproximately0.135%ofthe
readingforeachmbarchangeinbarometricpressure(the
sensoriscalibratedat1,013mbar).Usealtitude
compensationwhendeployingtheloggerforthebestCO
2

accuracypossible.
Toaccesscalibrationandaltitudecompensationsettingsin
theapp:
1. TaptheDevicesicon(inHOBOmobile,tapLoggersatthe
topofthescreen).Taptheloggerintheapptoconnectto
it.
2. TapConfigureinHOBOmobileortapinHOBOconnect.
3. TaptheCO
2
sensor.
4. Selectautocalibration,manualcalibration,orboth.
5. Select“AltitudeCompensation”andenterthealtitude
aboveorbelowsealevelwheretheloggerwillbedeployed
ineithermetersorfeet.InHOBOmobile:YoucantapUse
Locationifyouwantthelocationserviceswithinthephone
ortablettocalculatealtitude.
6. TapDoneorSave.
7. TapStarttoloadsettingstothelogger.
Toaccesscalibrationandaltitudecompensationsettingsin
HOBOware:
1. ConnecttheloggertothecomputerwiththeUSBcable.
2. FromtheDevicemenuinHOBOware,selectLaunch.
3. ClicktheCO
2
Settingsbutton.
4. Selectautocalibration,manualcalibration,orboth.
5. Select“UseCarbonDioxidesensoraltitudecompensation”
andenterthealtitudeaboveorbelowsealevelwherethe
loggerwillbedeployedineithermetersorfeet.
6. ClickOK.
7. ClickStartintheLaunchLoggerwindowtoloadsettingsto
thelogger.
Note:Ifbothautocalibrationandmanualcalibrationare
selected,theloggerwillautomaticallycalibratewithin24hours
afterloggingbeginsunlessamanualcalibrationoccursduring
thattimeperiod.Inaddition,whenbothcalibrationsettingsare
selected,theeight‐daycalibrationcyclewillberesetanytimea
manualcalibrationisperformed.
TomanuallycalibratetheCO
2
sensor:
Important:Ifyoudonotfollowthesemanualcalibration
instructionsasdescribed,thesensorreadingswillbeincorrect
andyouwillneedtomanuallycalibratetheloggeragain.
1. Taketheloggeroutsideinfreshaironadrydaywherethe
carbondioxidelevelis400ppm.Youcanalsouseanindoor
locationformanualcalibrationifitisunoccupiedandisnot
exposedtoaventilationsystem.
2. PresstheCalibratebuttonontheloggerfor5secondsuntil
itbeeps.Theloggerwillthencalibratefor5minutes.The
CO
2
andCalibratesymbolsontheLCDwillflashwhilethe
calibrationisunderway.Atime‐anddate‐stampedmanual
calibrationeventisloggedinthedataattheendofthe5‐
minutecalibrationsequence.
3. OncetheCalibrationprocessiscomplete,returnthelogger
toitsdeploymentlocation.Repeatthisprocessatleastonce
everyeightdaysforbestaccuracy.
SettingupAlarms
Youcansetanalarmtotripontheloggerwhenasensor
readingrisesaboveorfallsbelowaspecifiedvalue.Thiscan
alertyoutoproblemssoyoucantakecorrectiveaction.Toset
upasensoralarm:
1. Intheapp:ConnecttotheloggerandtapConfigurein
HOBOmobileortapinHOBOconnect..
InHOBOware:Fromthedevicemenu,selectLaunch.Click
theAlarmsbuttonintheLaunchLoggerwindow.
2. Selectthesensorthatyouwanttosetupwithanalarm
condition.
3. EnabletheHighAlarmifyouwantanalarmtotripwhenthe
sensorreadingrisesabovethehighalarmvalue.Dragthe
slidertothereadingthatwilltripthealarmortypea
specificreading.

HOBOMXCO
2
DataLogger(MX1102A)Manual
1‐800‐LOGGERS8www.onsetcomp.com
4. EnabletheLowAlarmifyouwantanalarmtotripwhenthe
sensorreadingfallsbelowthelowalarmvalue.Dragthe
slidertothereadingthatwilltripthealarmortypea
specificreading.
5. Setthedurationbeforeanalarmistrippedandselectone
ofthefollowing:
Cumulative.Thealarmwilltriponcethesensorreadingis
outoftheacceptablerangefortheselecteddurationany
timeduringlogging.Forexample,ifthehighalarmisset
to85°Fandthedurationissetto30minutes,thenthe
alarmwilltriponcethesensorreadingshavebeenabove
85°Fforatotalof30minutessincetheloggerwas
configured.
Consecutive.Thealarmwilltriponcethesensorreading
isoutoftheacceptablerangecontinuouslyforthe
selectedduration.Forexample,thehighalarmissetto
85°Fandthedurationissetto30minutes,thenthe
alarmwillonlytripifallsensorreadingsare85°For
aboveforacontinuous30‐minuteperiod.
6. Repeatsteps2–5foranyothersensorsifdesired(tapDone
orSaveintheappfirst).
7. EnableAudibleAlarmsifyouwantabeeptosoundonthe
loggerevery30secondswhenthesensoralarmtrips(inthe
app,enablethisintheconfigurationsettingsscreen;in
HOBOware,selecttheUseAudibleAlarmcheckboxinthe
ConfigureAlarmswindow).Thebeepingwillcontinueuntil
thealarmisclearedfromthesoftware,abuttononthe
loggerispressed,or7dayshavepassed.Batterylifewillbe
slightlyreducedwhenthissettingisenabled.Itis
recommendedthatyouonlyenablethisfeatureifyouhave
regularaccesstotheloggersothatyoucaneasilyturnoff
thebeeping.
8. Selectoneofthefollowingoptionsforwhentoclearthe
alarmsymbolthatappearsontheLCD(intheapp,enable
thisintheconfigurationsettingsscreen;inHOBOware,
selectthecheckboxintheConfigureAlarmswindow).
Loggerreconfiguredorrelaunched.Thealarmiconwill
remainvisibleontheLCDuntilthenexttimetheloggeris
reconfigured.
Sensorisinlimits.Thealarmiconwillremainvisibleon
theLCDuntilthesensorreadingreturnstothenormal
rangebetweenanyconfiguredhighandlowalarmlimits.
Alarmbuttonispressed.Thealarmiconwillremain
visibleuntilyoupresstheClear/Nextbuttononthe
logger.
9. Intheapp:TapStartinHOBOmobileorin
HOBOconnect.
InHOBOware:ClickOKintheConfigureAlarmswindowand
thenclickStartintheLaunchLoggerwindowwhenready.
Notesaboutalarms:
ThealarmiconwillbeilluminatedontheloggerLCD
whenthealarmtrips.YoucanalsopresstheClear/Next
buttonontheloggertoviewthefarthestout‐of‐range
valueduringthedeployment.
AlarmlimitsfortemperatureandRHsensorsarechecked
every15seconds.TheCO
2
alarmlimitsarecheckedevery
15secondsiftheloggerispoweredbyUSBcableorevery
5minutesifitispoweredbybatteries.Ifyouare
configuringaCO
2
sensoralarmforabattery‐powered
logger,itisrecommendedthatthedurationyouselectis
divisibleby5andaminimumof5minutes.
ForUSB‐poweredloggers,CO
2
alarmswillnotbetripped
forthefirst15secondsafterloggingbeginsastheCO
2

sensorrequiresa15‐secondwarmupperiod.
Theactualvaluesforthehighandlowalarmlimitsareset
totheclosestvaluesupportedbythelogger.Inaddition,
alarmscantriporclearwhenthesensorreadingiswithin
theresolutionspecifications.
Whenyoureadoutthelogger,alarmeventscanbe
displayedontheplotorinthedatafile.SeeLogger
Events.
Oncecleared,anaudiblealarmwillstartbeepingagainif
thesensorvaluesgooutofthenormalrange.Evenifan
audiblealarmiscleared,avisualalarmmayremainon
theloggerLCDandintheapp(ifapplicable)depending
onthesettingsselectedformaintainingvisualalarmsor
becausethealarmconditionmaystillbeineffect.In
addition,anaudiblealarmwillcontinuebeepingwhen
thesensorvalueshavereturnedtothenormalrange
untilitiscleared.
Althoughanaudiblealarmandavisualalarmcanoccur
atthesametimewhenasensoralarmistripped,theyare
clearedindifferentways.Theaudiblealarmcanbe
clearedfromwithinthesoftware,abuttononthelogger
ispressed,or7dayshavepassed.Meanwhile,avisual
alarmisclearedasdeterminedbythesettingselectedfor
maintaininganalarminthesoftware.Thismeansyou
couldclearabeepingaudiblealarmandthevisualalarm
willremainontheLCDandintheapp(ifapplicable)until
theloggerisreconfigured,thesensorisinlimits,orthe
alarmbuttonispressed‐‐whicheversettingyouselected.
Iftheloggerwasconfiguredtostoploggingwithabutton
push,anytrippedalarmswillbeclearedautomatically
whenloggingisstoppedandnoAlarmClearedeventwill
beloggedinthedatafile.
BurstLogging
Burstloggingisaloggingmodethatallowsyoutosetupmore
frequentloggingwhenaspecifiedconditionismet.For
example,aloggerisrecordingdataata5‐minutelogging
intervalandburstloggingisconfiguredtologevery30seconds
whenthetemperaturerisesabove85°F(thehighlimit)orfalls
below32°F(thelowlimit).Thismeanstheloggerwillrecord
dataevery5minutesaslongasthetemperatureremains
between85°Fand32°F.Oncethetemperaturerisesabove
85°F,theloggerwillswitchtothefasterloggingrateandrecord
dataevery30secondsuntilthetemperaturefallsbackto85°F.
Atthattime,loggingthenresumesevery5minutesatthe
normallogginginterval.Similarly,ifthetemperaturefallsbelow
32°F,thentheloggerwouldswitchtoburstloggingmodeagain
andrecorddataevery30seconds.Oncethetemperaturerises
backto32°F,theloggerwillthenreturntonormalmode,
loggingevery5minutes.
Tosetupburstlogging:
1. Intheapp:ConnecttotheloggerandtapConfigurein
HOBOmobileortapinHOBOconnect.

HOBOMXCO
2
DataLogger(MX1102A)Manual
1‐800‐LOGGERS9www.onsetcomp.com
InHOBOware:FromtheDevicemenu,selectLaunch.
2. SettheLoggingModetoburstlogging.(Ifalreadyselected
inHOBOware,clicktheEditbutton.)
3. SelectthesensorthatwillhaveburstlimitsinHOBOmobile
andHOBOware.
4. EnableHighLimitifyouwantburstloggingtooccurwhen
thesensorreadingrisesaboveaspecificreading.Dragthe
slidertothereadingthatwilltriggerburstloggingortypea
specificreading.
5. EnableLowLimitifyouwantburstloggingtooccurwhen
thesensorreadingfallsbelowaspecificreading.Dragthe
slidertothereadingthatwilltriggerburstloggingortypea
specificreading.
6. Settheburstlogginginterval.Selectanintervalfasterthan
thelogginginterval.Keepinmindthatthemorefrequent
theburstloggingrate,thegreatertheimpactonbatterylife
andtheshortertheloggingduration.InHOBOmobile,tap
Done.
7. Repeatsteps3–5foranyothersensorsifdesired(tapDone
orSaveintheappfirst).
8. Intheapp:TapStartinHOBOmobileorin
HOBOconnect.
InHOBOware:ClickOKintheBurstLoggingwindowand
thenclickStartintheLaunchLoggerwindowwhenready.
NotesaboutBurstLogging:
Sensoralarms,statistics,andtheStopLoggingoption
“Never(Wrapping)”arenotavailableinburstlogging
mode.
Oncetheloggerisconfigured,thehighandlowburst
limitsarecheckedevery15seconds.Therefore,ifyouset
theloggingintervaltolessthan15secondsandthe
sensorreadingfallsoutsidethelevels,theburstlogging
willnotbeginuntilthenext15‐secondcycle.
Ifhighand/orlowlimitshavebeenconfiguredformore
thanonesensor,thenburstloggingwillbeginwhenany
highorlowconditiongoesoutofrange.Burstloggingwill
notenduntilallconditionsonallsensorsarebackwithin
normalrange.
Theactualvaluesfortheburstlogginglimitsaresetto
theclosestvaluesupportedbythelogger.
Burstloggingmodecanbeginorendwhenthesensor
readingiswithintheresolutionspecifications.
Oncethehighorlowconditionclears,thelogging
intervaltimewillbecalculatedusingthelastrecorded
datapointinburstloggingmode,notthelastdatapoint
recordedin“normalmode.”Forexample,aloggerhasa
10‐minuteloggingintervalandloggedadatapointat
9:05.Then,thehighlimitwassurpassedandburst
loggingbeganat9:06.Burstloggingthencontinueduntil
9:12whenthesensorreadingfellbackbelowthehigh
limit.Nowbackinnormalmode,thenextlogginginterval
willbe10minutesfromthelastburstloggingpoint,or
9:22inthiscase.Ifburstlogginghadnotoccurred,the
nextdatapointwouldhavebeenat9:15.
ANewIntervaleventiscreatedeachtimethelogger
entersorexitsburstloggingmode.SeeLoggerEventsfor
detailsonplottingandviewingtheevent.Inaddition,if
theloggerisstoppedwithabuttonpushwhileinburst
loggingmode,thenaNewIntervaleventisautomatically
loggedandtheburstconditioniscleared,evenifthe
actualhighorlowconditionhasnotcleared.
StatisticsLogging
Duringfixedlogging,theloggerrecordsdataforenabled
sensorsand/orselectedstatisticsatthelogginginterval
selected.Statisticsarecalculatedatasamplingrateyouspecify
withtheresultsforthesamplingperiodrecordedateach
logginginterval.Thefollowingstatisticscanbeloggedforeach
sensor:
Themaximum,orhighest,sampledvalue,
Theminimum,orlowest,sampledvalue,
Anaverageofallsampledvalues,and
Thestandarddeviationfromtheaverageforallsampled
values.
Forexample,aloggerisconfiguredwiththetemperatureand
CO
2
sensorsenabledandtheloggingintervalsetto5minutes.
Thecurrentreadingandallfourstatisticsareenabled.The
statisticssamplingintervalissetto30seconds.Oncelogging
begins,theloggerwillmeasureandrecordtheactual
temperatureandCO
2
sensorvaluesevery5minutes.In
addition,theloggerwilltakeatemperatureandCO
2
sample
every30secondsandtemporarilystoretheminmemory.The
loggerwillthencalculatethemaximum,minimum,average,
andstandarddeviationusingthesamplesgatheredoverthe
previous5‐minuteperiodandlogtheresultingvalues.When
readingoutthelogger,thiswouldresultinthefollowing10
dataseries(notincludinganyderivedseries):twosensorseries
(withtemperatureandCO
2
currentreadingsloggedevery5
minutes)pluseightmaximum,minimum,average,andstandard
deviationseries(fourfortemperatureandfourforCO
2
with
valuescalculatedandloggedevery5minutesbasedonthe30‐
secondsamplingrate).
Tosetupstatistics:
1. InHOBOmobile:ConnecttotheloggerandtapConfigurein
HOBOmobileortapinHOBOconnect.
InHOBOware:FromtheDevicemenu,selectLaunch.
2. Intheapp:TapLoggingModeandthenselectFixedInterval
LogginginHOBOmobileorFixedLogginginHOBOconnect.
InHOBOware:SelectStatisticsfortheloggingmode.
3. SelectNormalintheapporCurrentReadinginHOBOware
torecordthecurrentreadingforeachenabledsensoratthe
loggingintervalselected.Donotselectthisifyouonlywant
tologstatistics.
4. Selectthestatisticsyouwanttheloggertorecordateach
logginginterval:Maximum,Minimum,Average,and
StandardDeviation(averageisautomaticallyenabledwhen
selectingStandardDeviation).Statisticswillbeloggedforall
enabledsensors.Inaddition,themorestatisticsyourecord,
theshortertheloggerdurationandthemorememoryis
required.
5. Setthestatisticssamplinginterval.Therateselectedmust
belessthan,andafactorof,thelogginginterval.For
example,iftheloggingintervalis1minuteandyouselect5
secondsforthesamplingrate,thentheloggerwilltake12

HOBOMXCO
2
DataLogger(MX1102A)Manual
1‐800‐LOGGERS10www.onsetcomp.com
samplereadingsbetweeneachlogginginterval(onesample
every5secondsforaminute)andusethe12samplesto
recordtheresultingstatisticsateach1‐minutelogging
interval.Notethatthemorefrequentthesamplingrate,the
greatertheimpactonbatterylife.InHOBOmobile,tap
Done.
6. Intheapp:TapDoneorSave.TapStartinHOBOmobileor
inHOBOconnect.
InHOBOware:ClickOKintheBurstLoggingwindowand
thenclickStartintheLaunchLoggerwindowwhenready.
Onceloggingbegins,presstheClear/Nextbuttononthelogger
tocyclethroughthecurrentmaximum,minimum,average,and
standarddeviationdataontheLCDscreen.Notethatthelogger
willalwaysdisplaythecurrentsensorreadingsintheapp(If
applicable)eveniftheyarenotbeinglogged.Youcanplotthe
statisticsseriesonceyoureadoutthelogger.
SettingaPassword
Youcancreateanencryptedpasswordfortheloggerthatwill
berequiredifanotherphoneortabletattemptstoconnectto
it.Thisisrecommendedtoensurethatadeployedloggerisnot
mistakenlystoppedorpurposelyalteredbyothers.This
passwordusesaproprietaryencryptionalgorithmthatchanges
witheveryconnection.
Tosetapassword:
1. TaptheDevicesicon(inHOBOmobile,tapLoggersatthe
topofthescreen).Taptheloggerintheapptoconnectto
it.
2. TapLoggerPasswordinHOBOmobileortapandthen
inHOBOconnect.
3. TypeapasswordandthentapSaveorSet.
Onlythephoneortabletusedtosetthepasswordcanthen
connecttotheloggerwithoutenteringapassword;allother
mobiledeviceswillberequiredtoenterthepassword.For
example,ifyousetthepasswordfortheloggerwithyourtablet
andthentrytoconnecttothedevicelaterwithyourphone,
youwillberequiredtoenterthepasswordonthephonebut
notwithyourtablet.Similarly,ifothersattempttoconnectto
theloggerwithdifferentdevices,thentheywouldalsobe
requiredtoenterthepassword.Toresetapassword,Press
boththeStart/StopbuttonandtheClear/Nextbutton
simultaneouslyfor3secondstoresetaloggerpassword,or
connecttotheloggerandthentapSetLoggerPasskeyand
selectResettoFactoryDefaultinHOBOmobileortap,then
,andtapResetinHOBOconnect.
ReadingOuttheLogger
Tooffloaddatafromtheloggertotheapp:
1. TaptheDevicesicon(inHOBOmobile,tapLoggersatthe
topofthescreen).Taptheloggerintheapptoconnectto
it.
2. TapReadoutinHOBOmobileortapinHOBOconnect.
3. InHOBOmobile:TaptheDataFilesiconandthentapthe
mini‐graphtoviewalargerversionofthegraphorshare
thefile.
InHOBOconnect:TaptheHOBOFilesiconandselectthe
filetoviewit.Tapandthentoexportandsharethe
data.
DatacanalsobeuploadedautomaticallytoHOBOlink,Onset’s
web‐basedsoftware,viatheapportheMXgateway.For
details,seetheappuser’sguideandseetheHOBOlinkhelpfor
detailsonworkingwithdatainHOBOlink.
TooffloaddatefromtheloggertoHOBOware:
1. ConnecttheloggertothecomputerwiththeUSBcable.
2. FromtheDevicemenu,selectReadout.
3. Savethedatafilewhenprompted.SeetheHOBOwareHelp
fordetailsonplottingandexportingdatainHOBOware.
Note:Datafilesreadoutfromtheloggerinoneprogramare
notautomaticallyavailableintheother.Toopenappfilesin
HOBOware,sharetheHOBOfileviaemailandopenitonthe
computerwithHOBOware.FilesinHOBOwarecannotbe
viewedintheapp.Youcan,however,exportdatainHOBOware
toatextorExcelfilethatyoucanopenonyourmobiledevice.
Seetheappuser’sguideandHOBOwareHelpfordetailson
sharingorexportingdata.
LoggerEvents
Theloggerrecordsthefollowinginternaleventstotracklogger
operationandstatus.Youcanvieweventsinexportedfilesor
ploteventsintheapp.
ToploteventsinHOBOmobile,tapamini‐graphandthen
tap.Selecttheeventsyouwanttoplotandthentap
again.
ToploteventsinHOBOconnect,taptheHOBOFilesicon
andselectafiletoopen.Tapandthentap.Select
theeventsyouwanttoplotandtapOK.
InternalEventNameDefinition
HostConnectedTheloggerwasconnectedtothemobile
deviceorcomputerasapplicable.
StartedTheStart/Stopbuttonwaspressedtobegin
orresumelogging.
StoppedTheloggerreceivedacommandtostop
recordingdata(fromthesoftwareorby
pushingtheStart/Stopbutton).
ButtonUp/Button
Down
TheStart/Stopbuttonwaspressedfor
1second.
Chan<#>Alarm
Tripped
Asensoralarmhastripped;<#>isthesensor
number,where1isCO
2
,2istemperature,
and3isRH.
Chan<#>Alarm
Cleared
Asensoralarmhascleared;<#>isthesensor
number,where1isCO
2
,2istemperature,
and3isRH.Thiseventalsocontainsthe
valuethatwasfurthestoutofrangeforthe
sensorbeforethealarmcleared,whichis
onlyavailableinasharedorexportedfile.
NewIntervalTheloggerhasenteredorexitedburst

HOBOMXCO
2
DataLogger(MX1102A)Manual
1‐800‐LOGGERS11www.onsetcomp.com
InternalEventNameDefinition
loggingmode.
Automatic
Calibration
TheCO
2
sensorhasbeencalibrated
automatically;thedatafilewillshowthe
offsetcalculatedinPPMduringthe
calibration.
ManualCalibrationTheCO
2
sensorhasbeenmanually
calibrated;thedatafilewillshowtheoffset
calculatedinPPMduringthecalibration.
SafeShutdownThebatteryleveldroppedbelow3.7V;the
loggerperformsasafeshutdown.
MountingtheLogger
Thereareseveralwaystomounttheloggerusingthematerials
included:
AttachCommandstripstothebackoftheloggerto
mountittoawallorotherflatsurface.
Screwinthebracketsontobothsidesoftheloggerusing
thetwosmallholeslabeledinthediagrambelowand
thenusetiewrapstomountittoapoleorpipe.
Mounttheloggertothewalloraflatsurfaceusingtwo
screwsandtheincludedtemplate.Thedimensionsare
alsoshowninthefollowingexample.

ProtectingtheLogger
Theloggerisdesignedforindooruseandcanbepermanently
damagedbycorrosionifitgetswet.Protectitfrom
condensation.IfthemessageFAILCLKappearsontheLCD
screen,therewasafailurewiththeinternalloggerclock
possiblyduetocondensation.Removethebatteryimmediately
anddrythecircuitboard.
Note:Staticelectricitymaycausetheloggertostoplogging.
Theloggerhasbeentestedto8KV,butavoidelectrostatic
dischargebygroundingyourselftoprotectthelogger.Formore
information,searchfor“staticdischarge”ononsetcomp.com.
BatteryInformation
Theloggerrequiresfouruser‐replaceableAA1.5Valkalineor
optionallithiumbatteriesforoperationattheextremeendsof
theloggeroperatingrange.Expectedbatterylifevariesbased
ontheambienttemperaturewheretheloggerisdeployed,the
loggingorsamplinginterval,frequencyofoffloadingand
connectiontoamobiledevice,numberofchannelsthatare
active,audiblealarmsduration,useofburstmodeorstatistics
logging,andbatteryperformance.Newbatteriestypicallylast6
monthswithloggingandsamplingintervalsgreaterthan5
minutes.
Deploymentsinextremelycoldorhottemperatures,ora
loggingorsamplingintervalfasterthan5minutescanimpact
batterylife.Estimatesarenotguaranteedduetouncertainties
ininitialbatteryconditionsandoperatingenvironment.
TheloggercanalsobepoweredbytheUSBcableiffaster
loggingintervalsaredesiredorwhentheremainingbattery
voltageistoolowforittocontinuelogging.Connectthelogger
tothecomputer,clicktheReadoutbuttononthetoolbarin
HOBOware,andsavethedataasprompted.Replacethe
batterybeforelaunchingtheloggeragain.
Toinstallorreplacethebatteries:
1. UseaPhillips‐headscrewdrivertounscrewthebattery
coveronthebackofthelogger.

2. Removeanyoldbatteries.
3. Insertfournewbatteriesobservingpolarity.
4. Screwthebatterycoverbackinplace.
WARNING:Donotcutopen,incinerate,heatabove85°C
(185°F),orrechargethelithiumbatteries.Thebatteriesmay
explodeiftheloggerisexposedtoextremeheatorconditions
thatcoulddamageordestroythebatterycase.Donotdispose
oftheloggerorbatteriesinfire.Donotexposethecontentsof
thebatteriestowater.Disposeofthebatteriesaccordingto
localregulationsforlithiumbatteries.
Note:CO
2
sensorreadingsmaytemporarilyappearas0ppmin
HOBOmobilewhenreplacingthebatteriesuntilthelogger
beginsloggingagain.















9.53cm(3.75inches)
Bracket
mounting
hole
Bracket
mounting
hole
Wall
mounting
hole
Wall
mounting
hole
Removethis
screwto
replacethe
batteries

HOBOMXCO2DataLogger(MX1102A)Manual
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1‐800‐LOGGERS(564‐4377)•508‐759‐9500
www.onsetcomp.com/support/contact
©2015–2020OnsetComputerCorporation.Allrightsreserved.Onset,HOBO,andHOBOmobileareregistered
trademarksofOnsetComputerCorporation.AppStoreisaservicemarkofAppleInc.AndroidandGooglePlayare
trademarksofGoogleLLC.BluetoothandBluetoothSmartareregisteredtrademarksofBluetoothSIG,Inc.Allother
trademarksarethepropertyoftheirrespectivecompanies.
Patent#:8,860,56922504‐D
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FederalCommunicationCommissionInterferenceStatement
ThisequipmenthasbeentestedandfoundtocomplywiththelimitsforaClassBdigitaldevice,pursuanttoPart15oftheFCCRules.Theselimitsaredesignedtoprovide
reasonableprotectionagainstharmfulinterferenceinaresidentialinstallation.Thisequipmentgeneratesusesandcanradiateradiofrequencyenergyand,ifnotinstalledand
usedinaccordancewiththeinstructions,maycauseharmfulinterferencetoradiocommunications.However,thereisnoguaranteethatinterferencewillnotoccurina
particularinstallation.Ifthisequipmentdoescauseharmfulinterferencetoradioortelevisionreception,whichcanbedeterminedbyturningtheequipmentoffandon,theuser
isencouragedtotrytocorrecttheinterferencebyoneofthefollowingmeasures:
Reorientorrelocatethereceivingantenna
Increasetheseparationbetweentheequipmentandreceiver
Connecttheequipmentintoanoutletonacircuitdifferentfromthattowhichthereceiverisconnected
Consultthedealeroranexperiencedradio/TVtechnicianforhelp
ThisdevicecomplieswithPart15oftheFCCRules.Operationissubjecttothefollowingtwoconditions:(1)Thisdevicemaynotcauseharmfulinterference,and(2)thisdevice
mustacceptanyinterferencereceived,includinginterferencethatmaycauseundesiredoperation.
FCCCaution:Anychangesormodificationsnotexpresslyapprovedbythepartyresponsibleforcompliancecouldvoidtheuser'sauthoritytooperatethisequipment.
IndustryCanadaStatements
ThisdevicecomplieswithIndustryCanadalicense‐exemptRSSstandard(s).Operationissubjecttothefollowingtwoconditions:(1)thisdevicemaynotcauseinterference,and
(2)thisdevicemustacceptanyinterference,includinginterferencethatmaycauseundesiredoperationofthedevice.
Avisdeconformitépourl’IndustrieCanada
LeprésentappareilestconformeauxCNRd'IndustrieCanadaapplicablesauxappareilsradioexemptsdelicence.L'exploitationestautoriséeauxdeuxconditionssuivantes:(1)
l'appareilnedoitpasproduiredebrouillage,et(2)l'appareildoitacceptertoutbrouillageradioélectriquesubi,mêmesilebrouillageestsusceptibled'encompromettrele
fonctionnement.
TocomplywithFCCandIndustryCanadaRFradiationexposurelimitsforgeneralpopulation,theHOBOMXloggermustbeinstalledtoprovideaseparationdistanceofatleast
20cmfromallpersonsandmustnotbeco‐locatedoroperatinginconjunctionwithanyotherantennaortransmitter.
NCCStatement
經型式認證合格之低功率射頻電機，非經許可，公司、商號或使用者均不得擅自變更頻率、加大功率或變更原設計之特性及功能。
低功率射頻電機之使用不得影響飛航安全及干擾合法通信；經發現有干擾現象時，應立即停用，並改善至無干擾時方得繼續使用。前項合法通信，指依電信法規定作
業之無線電通信。低功率射頻電機須忍受合法通信或工業、科學及醫療用電波輻射性電機設備之干擾。
Translation:
Article12
WithoutpermissiongrantedbytheNCC,anycompany,enterprise,oruserisnotallowedtochangefrequency,enhancetransmittingpoweroralteroriginalcharacteristicaswell
asperformancetoanapprovedlowpowerradio‐frequencydevice.
Article14
Thelowpowerradio‐frequencydevicesshallnotinfluenceaircraftsecurityandinterferewithlegalcommunications.Iffound,theusershallceaseoperatingimmediatelyuntilno
interferenceisachieved.ThesaidlegalcommunicationsmeansradiocommunicationsisoperatedincompliancewiththeTelecommunicationsAct.Thelowpowerradio‐
frequencydevicesmustbesusceptiblewiththeinterferencefromlegalcommunicationsorISMradiowaveradiateddevices.
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