Extech Instruments SD910 User manual

USER MANUAL
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3‐ChannelDCVoltageDatalogger
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ModelSD910
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Distributore Autorizzato : Geass S.r.l. - Torino - Tel.: [phone] - [email protected] - web site :www.geass.com

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TableofContents
1.INTRODUCTION3
2.DESCRIPTIONS4
3.OPERATION5
Power5
ConnectingVoltageCables5
Datalogging5
Time/Date/SampleRateCheck6
SDCardDataStructure6
TransferringDatatoaPC6
AdvancedSettings7
SystemRESET8
RS232Interface8
Backlight8
4.MAINTENANCE8
BatteryReplacement8
CleaningandStorage8
5.SPECIFICATIONS9

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1. Introduction
Thank you for selecting the Extech SD910 3-Channel Voltage Datalogger.
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TheSD910isathreechannel0to300mVor0to3000mVDCvoltagemonitoranddatalogger.
Dataisstoredataselectablerateandstoredforeasyexporttoaspreadsheet.
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Thisdeviceisshippedfullytestedandcalibratedand,withproperuse,willprovideyearsof
reliableservice.Pleasevisitourwebsite(www.extech.com)tocheckforthelatestversionof
thisUserGuide,ProductUpdates,ProductRegistration,andCustomerSupport.
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Features
TripleLCDsimultaneouslydisplays(3)300mVor(3)3000mVchannels
Dataloggerdate/timestampsandstoresreadingsonanSDcardinExcel®formatforeasy
transfertoaPC
Selectabledatasamplingrate:1,2,5,10,30,60,120,300,600seconds,auto

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2. Descriptions
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1. Channel1Display
2. Channel2Display
3. Channel3Display
4. LOGand(ENTER)button
5. SETbutton
6. ▲and (TIME)button
7. ▼and (Power)button
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8.
ACadaptorsocket
9.
Resetbutton
10. RS‐232output
11.
SDmemorycardsocket
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12.
Channel1input
13.
Channel2input
14. Channel3input
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Note:BatteryCompartmentandTiltStandarelocatedonthebackofthemeter.
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3. Operation
Power
1. Installsix(6)1.5VAAAbatteries.Thebatteriesprovidebackuppowerfortheclock.
2. ConnecttheAC/DCpoweradaptortotheDC9Vinputonthemeter.Thepoweradaptoris
requiredfordatalogging.
3. Whenthe iconappearsinthedisplaythebatteriesareweakandshouldbereplaced.
However,in‐spec.measurementsmaystillbemadeforseveralhours,afterthelowbattery
indicatorappears.
ConnectingVoltageCables
1. Connectthevoltagewirestotheplugasshownandthen
inserttheplugintothesocketsonthebottomofthe
datalogger(observepolarity)
2. Uptothreecablesmaybeinstalled.
3. Thevoltagefortheinsertedcableswillbedisplayed1,2,
and3fromtoptobottom.
4. 0.00willbedisplayedforopenorunusedinputs.
Datalogging
1. OpentheleftsidedoorandinsertaformattedSDcard
Notes
TheSDcardshouldbe1GBto4GBincapacity.
Donotusememorycardsformattedbyothermetersorcameras.UsetheSDcard
formattingprocedureundertheadvancedfeaturessectionofthismanualtocorrectly
formatthecard.
Theinternalclockmustbesettothecorrecttime.Seetheadvancedfeaturessectionof
thismanualtosettheclock.
Thedefaultdatastructureusesadecimalpoint“.”asthenumericdecimalindicator.See
theadvancedfeaturessectionofthismanualtochangethistoacomma“,”.
IftheSDmemorycardisnotinstalled,“EMPTY”willappearinthedisplay.
Ifthevoltagecableisnotinstalled,randomnumbersmayappearinthedatafile.
Ifthevoltagecableisnotinstalled,afterdatadownloadtheeunitssymbolmaynot
appearinthedisplay.
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Displayederrormessages:
Thememorycardisfullorthereisaproblemwiththecard
Thebatteryislowanddataloggingisdisabled
TheSDcardisnotinserted
2. PresstheLOGbuttonfor>2secondstobeginlogging.“DATALOGGER”willappearinthe
displayandthemeterwillbeepeachtimethedataisrecorded(ifthebeeperisenabled).
3. Tostopdatalogging,presstheLOGbuttonfor>2seconds.“DATALOGGER”willchangeto
“DATA”andthemeterwillcountdownthroughtherecordeddata.
NOTE:Toavoidcorruptingdata,donotremovethememorycardwithoutproperlyendingthe
recordfunction.
Time/Date/SampleRateCheck
PressandHoldthe buttonfor>2secondsandthedisplaywillcyclethroughthedate,time
andsamplerateinformation.
SDCardDataStructure
1. WhentheSDcardiffirstinsertedintothedataloggerthefolderMVA01iscreated.
2. ThefirstdataloggingsessionwillthencreateafileMVA01001.XLS.Alldatawillbesaved
tothisfileuntilthenumberofcolumnsreaches30,000.
3. After30,000columnsanewfile,MVA01002.XLSiscreated.Thisisrepeatedevery30,000
columnsuntilMVA01099.XLS.Atthispointanewfolder,MVA02iscreatedandthe
processisrepeated.MVA10isthefinalfolder.
TransferringDatatoaPC
1. RemovethememorycardfromthedataloggerandplugitintotheSDcardslotonthePC.
2. LaunchExcelandopenthedatafileonthememorycard.Thefilewillappearsimilarto
thefigurebelow.
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no
CArd
LobAt
CH-
CArd

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AdvancedSettings
TheSETfunctionisusedto:
FormattheSDmemorycard
Setthedateandtime
Setthesamplingtime
SetthebeepersoundON/OFF
SettheSDcardDecimalcharacter
SettheRS232dataoutputON/OFF
Setthevoltagerangeto300mVor3000mV
1. PressandHoldtheSETbuttonfor>2secondstoenterthesettingmode.
Thefirstfunction(SdF)willappearinthedisplay.PresstheSETbuttontostepthroughthe
sevenfunctions.Usethe▲and▼buttonstoadjusttheselectedfunction.Usethe“LOG”
buttontostepthroughfieldswithinafunction.IntheSETmode,ifnobuttonispressed
within5seconds,theloggerwillrevertbacktothestandardmode.
2. SdF–FormattheSDcard.
Pressthe▲buttontoselectyESorno.ForyES,pressthebutton.WhenyESandEnt
appear,pressthe keyagaintoformatthecardanderaseallexistingdata.Thescreen
willdisplayaflashingyEsandESCwhilethememoryisbeingerasedandformatted.
3. dAtE–Setthedateandtime.
Pressthe▲or▼buttonstoadjusttheselected(blinking)field.Pressthebuttonto
storethevalueandtostepthroughthevariousfields(Year,Month,Day,Hour,Minute,
Second)
4. SP‐t–Setthesamplerate.
Pressthe▲buttontoselectthedesiredsamplerateandpressEntertostoretheselection.
Theselectionsare:5,10,30,60,120,300,600secondsandAUTO.InAUTO,thedatawillbe
storedeverytimethereisachangeof>10digits.
5. bEEP‐SetthebeeperONorOFF.
Pressthe▲buttontoselectONorOFFandpresstostoretheselection.
6. dEC‐SettheSDcardDecimalcharacter.
Pressthe▲buttontoselectUSA(decimal)orEuro(comma)andpresstostorethe
selection.
7. rS232‐SettheRS232dataoutputON/OFF.
Pressthe▲buttontoselectONoroffandpress tostoretheselection.
8. Rng–Setthevoltagerange
Pressthe▲buttontoselecteitherto3000mVorthe300.0mVrangeandpress tostore
theselection.
9. ESC–Exitthesettingmode.
PresstheSETbuttontoreturntonormaloperation.

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SystemRESET
IfaconditionappearswheretheCPUdoesnotrespondtokeystrokesorthemeterseemsfrozen,
presstheRESETbuttononthesideofthedatalogger(useapapercliporsimilarpointedobject)to
returnthemetertoaworkingstate.
RS232Interface
ForstreamingofdatatoaPCviatheRS232Outputjack,theoptional407001‐USBkit(RS232to
USBcableanddriverCD)alongwiththe407001software(availablefreeatwww.extech.com)are
required.
Backlight
Pressthe buttontoturnonthebacklight.Thebacklightwillautoturnoffafter5seconds.

4. Maintenance
BatteryReplacement
1. Toreplaceorinstallbatteries,removethePhilipsheadscrewthatsecurestherear
batterycoverandliftoffthecover.
2. ReplacethesixAAAbatteries(usealkalineheavydutytype),observingpolarity.
3. Replaceandsecurethecover.

BatterySafetyNotes:Pleasedisposeofbatteriesresponsibly;neverdisposeofbatteriesina
fire,batteriesmayexplodeorleak.Ifthemeterisnottobeusedfor60daysormore,remove
thebatteryandstoreseparately.Donotmixbatterytypesorfreshnesslevels;pleaseuse
batteriesofthesametypeandofthesamefreshnesslevel.

Neverdisposeofusedbatteriesorrechargeablebatteriesinhouseholdwaste.
Asconsumers,usersarelegallyrequiredtotakeusedbatteriestoappropriate
collectionsites,theretailstorewherethebatterieswerepurchased,orwherever
batteriesaresold.
Disposal:Donotdisposeofthisinstrumentinhouseholdwaste.Theuserisobligatedtotake
end‐of‐lifedevicestoadesignatedcollectionpointforthedisposalofelectricalandelectronic
equipment.

CleaningandStorage
Periodicallywipethecasewithadampclothandmilddetergent;donotuseabrasivesor
solvents.
Pleaseremovethebatteriesifthemeterisstoredforalongperiodoftime.
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5. Specifications(at23±5°C)

Display 60mmx50mm(2.4x2.0”)LCDwithbacklight
MemoryCardSDmemorycard,1GBto16GB.
InputChannels3
DCVoltageRange Resolution Accuracy
0to300.0mV0.1mV ±(0.5%+0.2mV)
0to3000mV1mV ±(0.5%+2mV)

Inputimpedance5.6MOhms
InputsNegative(‐)terminalsconnectedtoanalogground
DataloggerSamplingTime1/2/5/10/30/60/120/300/600seconds/auto
(withthesamplingratesetto‘1’secondsomedatapointscouldbelost)
Dataerrornumber≤0.1%no.oftotalsaveddatatypically
DisplayupdaterateApprox.1second
DataOutputRS232
OperatingTemperature0to50°C(32to122°F)
OperatingHumidity<85%R.H.
PowerSupply9VACadaptorrequiredfordatalogging
6AAA(UM4)Alkalineorheavyduty1.5Vbatteriesare
usedforclockbackupandmeasurementdisplayonly.
BatterylifeDependentonsamplerate,fornewalkalinebatteriesand
60secondsamplingtime,>onemonthistypical.Fast
samplerateswillsignificantlyreducebatterylife.
ThebatterylifewilldecreaseifthebeeperissetON
Weight199g(0.44lbs.) 
Dimension132x80x32mm(5.2x3.1x1.3“)

Note:AbovespecificationtestsperformedunderenvironmentalRFFieldStrength<3V/M&
frequency<30MHzonly.
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