Specifications

ManualsBrandsOnset Computer ManualsData LoggersMX2306 HOBO MX Soil Moisture Data Logger, MX2307 HOBO MX Soil Moisture and Temperature Data Logger

HOBOMXSoilMoisture(MX2306) andMXSoilMoistureandTemperature(MX2307)DataLoggerManual

1‐508‐759‐9500(U.S.andInternational) 6 www.onsetcomp.com

1‐800‐LOGGERS(U.S.only) 

Tosetupburstlogging:

1. TapDevices.Pressthebuttonontheloggertowakeitup(if

necessary).

2. Taptheloggerintheapptoconnecttoitandtap .

3. TapLoggingModeandthentapBurstLogging.

4. SelectLowand/orHighandeithertype

ordragthesliderto

setthelowand/orhighvalues.

5. Repeatstep4fortheothersensorifdesired.

6. Settheburstlogginginterval,whichmustbefasterthanthe

logginginterval.Keepinmindthatthefastertheburst

loggingrate,thegreatertheimpacton

batterylifeandthe

shortertheloggingduration.Becausemeasurementsare

beingtakenattheburstloggingintervalthroughoutthe

deployment,thebatteryusageissimilartowhatitwouldbe

ifyouhadselectedthisrateforthenormallogginginterval.

7. TapSave.

Notes:

 The highandlow

burstlimitsarecheckedattheburst

loggingintervalratewhethertheloggerisinnormalor

burstcondition.Forexample,iftheloggingintervalisset

to1hourandtheburstloggingintervalissetto10

minutes,theloggerwillalwayscheckforburstlimits

every10

minutes.

 Ifhighand/orlowlimitshavebeenconfiguredformore

thanonesensor,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canbeginorendwhenthesensorreadingis

withintheresolutionspecifications.Thismeansthevalue

thattriggersburstloggingmaydifferslightlythanthe

valueentered.

 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atthenormalloggingrate.Forexample,the

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,aNewIntervaleventisautomatically

loggedandtheburstconditioniscle ared,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

 The standarddeviationfromtheaverageforallsampled

values.

Forexample,anMX2307loggerisconfiguredwithboththesoil

moistureandtemperaturesensorsenabled,andthelogging

intervalis

setto5minutes.Theloggingmodeissettofixed

loggingwithNormalandallfourstatisticsenabledandwitha

statisticssamplingintervalof30seconds.Onceloggingbegins,

theloggerwillmeasureandrecordtheactualsoilmoistureand

temperaturesensorvaluesevery5minutes.Inaddition,the

loggerwilltakeasoilmoistureandtemperature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10dataseries:two

sensorseries(withsoilmoistureandtemperatureloggedevery

5minutes)pluseightmaximum,minimum,average,and

standarddeviationseries(fourforsoilmoistureandfourfor

temperaturewithvaluescalculatedandloggedevery5minutes

basedonthe30‐secondsampling).

logstatistics:

1. TapDevices.Pressthebuttonontheloggertowakeitup(if

necessary).

2. Taptheloggerintheapptoconnecttoitandtap .

3. TapLoggingModeandthenselectFixedLogging.

4. SelectNormaltorecordthecurrentreadingforeach

enabledsensorattheloggingintervalshownatthetopof

thescreen.Donotselectthisifyouonlywanttolog

statistics.

5. 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.

6. TapStatisticsSamplingIntervalandselecttheratetouse

forcalculatingstatistics.Theratemustbelessthan,anda

factor

of,thelogginginterval.Forexample,ifthelogging

intervalis1minuteand5secondswasselectedforthe

samplingrate,theloggerwilltake12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

fasterthesamplingrate,thegreatertheimpactonbattery

life.Becausemeasurementsarebeingtakenatthestatistics

samplingintervalthroughoutthedeployment,thebattery

usageissimilartowhatitwouldbeifyou hadselectedthis

rateforthenormallogginginterval.

7. TapSave.