Extech Instruments SDL900 User manual

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USERGUIDE
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AC/DCMagneticMeter
ModelSDL900
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EXTECHINSTRUMENTS
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Introduction
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ThankyouforselectingtheExtechInstrumentsModelSDL900.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,
andCustomerSupport.
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Features
Widerangeofapplicationsforindustrial,mechanical,material,electrical,laboratory,and
fielduse
DCandACmagneticfieldmeasurements
NorthandSouthpoleindicator
Automatictemperaturecompensation
ZerobuttonforDCmagneticfunction
Separateprobeforconvenientremotemeasurements
RS232/USBcomputerinterface
Microprocessorcircuitassuresmaximumaccuracyandprovidesadvancedfunctions
Heavydutyandcompacthousingwithhardcarryingcase
Autopowerofffeaturesavesbatterylife
RealtimeSDmemorycardDatalogger
Built‐inclockandcalendar
Manualdatalogger
Easy‐to‐readLCDdisplaywithgreenbacklight
DataholdandMIN‐MAXRecordingfeatures

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3SDL900‐en‐GB_V1.45/15
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MeterDescription
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1. ProbeConnection
2. LCDDisplay
3. HOLDButton
4. POWERButton
5. SETButton
6. RANGE/UpArrowButton
7. FUNCTION/DownArrowButton
8. ENTER/LOGButton
9. MAX/MINButton
10. RS‐232OutputTerminal(Side)
11. ResetButton(Side)
12. DC9VPowerAdapterInputSocket(Side)
13. TiltstandandBatterycompartment(Back)
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Probe
1. ProbeSensingHead
2. ProbeHandle
3. ProbePlug
4. ProbeHeadCover
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4SDL900‐en‐GB_V1.45/15
Operation
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AC/DCMagneticFieldMeasurement
SwitchthemeterONbypressingandholdingthePOWERbuttonforatleasttwoseconds.Press
andholdtheFUNCTIONbuttontoselecteitherDCorACmagneticfieldmeasurement.Pressand
holdtheRANGEbuttonuntilthedesiredrange(1or2)isselected.Selectthedesiredunitof
measure(mTorG).
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ForDCmagneticfieldmeasurements,thedisplaywillshoweithertheNorSindicator.Forthe
NorthPole,theNindicatorwillbeshown.Similarly,fortheSouthPole,theSindicatorwillbe
shown.ForACmagneticfieldmeasurements,thedisplaywillshowtheACindicator.Thedisplay
willnotshowtheNorSindicator.
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Contactandpressthetestingmaterialtotheprobehead(seeFig1).Thedisplaywillshowthe
magneticfieldvaluealongwiththemeasurementunit(mTorG).
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Figure1
Note:WhenthemeterispoweredON,thedisplaymayshowanon‐zerovalue;thisisbecauseof
environmentalinterference.Beforetakingameasurement,settheprobeattheoptimum
position.ToZerothedisplay,pressandholdthe▲and▼buttonsuntilthedisplayshowsthe
“0”valueandthedisplayflashestheZEROindicator.Themeterisnowzeroed.
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DataHold
Duringthemeasurements,presstheHOLDbuttontofreezeadisplayedreading.Themeasured
valuewillbeheldandtheLCDwilldisplaytheHOLDsymbol.PresstheHOLDbuttonagainto
releasethedataholdfunction.
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5SDL900‐en‐GB_V1.45/15
DataRecord(MaximumandMinimumReading)
PresstheRECbuttontostartthedatarecordfunction.TheLCDwilldisplayaRECsymbol.Press
theRECbuttonagain,andtheRECMAXsymbolalongwiththemaximumreadingvaluewillbe
displayed.PresstheRECbuttonagaintodisplaytheminimumvalue.TheLCDwillalsoshowthe
RECMINsymbols.Toexitthismode,pressandholdtheRECbuttonfortwoseconds.Themeter
willreturntothenormaloperatingmode.
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Note:WhenmakingDCmagneticfieldmeasurementsintheRECORDmode,themetercannot
bechangedfromNorthpoletoSouthpole,orviceversa.
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SetMode
PressandholdtheSETbuttonfortwosecondstoentertheSetMode.Momentarilypressingthe
SETbuttonwillcyclethroughoutthesevenfunctions.Theyare(inorder):
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DATE………Setclock(Year/Month/Date,Hour/Minute/Second)
SP‐T……….Setsamplingtime(from0~3600seconds)
POFF………AutopowerOFFmanagement
BEEP……...SetbeeperON/OFF
DEC………..SetSDcardDecimalcharacter(commaformetricordecimalforimperial)
SD‐F……….FormattheSDmemorycard
UNIT……….Selectthemagneticfieldunits(mT:milliTeslaorG:Gauss)
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Note:PressandholdtheSETbuttonfortwosecondswhenintheSetModetoexit.
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SettheClockTimeandDate
WhentheLCDdisplaysDATE,presstheENTERbutton.Usethe▲and▼buttonstoadjustthe
value(startingwiththecurrentYEAR).Afterthedesiredvalueisset,presstheENTERbuttonto
steptothenextitem.Afterallsixparametersareset,presstheENTERbuttontosavethe
settings.
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Note:TheSDL900internalbatteryallowstheinternalclocktorunprecisely,evenafteritis
switchedOFF(aslongasthebatteryisfresh).
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SetSamplingTime
WhentheLCDdisplaysSP‐T,presstheENTERbutton.Usethe▲and▼buttonstoadjustthe
samplingtime(rateofdatalogging)to0,1,2,5,10,30,60,120,300,600,1800,or3600seconds.
Afterthedesiredsamplingtimeisselected,presstheENTERbuttontosavethesetting.

EXTECHINSTRUMENTS
6SDL900‐en‐GB_V1.45/15
AutoPowerOFFManagement
WhentheLCDdisplaysPOFF,presstheENTERbutton.Usethe▲and▼buttonstoselectYES
orNO.SelectingYESenablestheAutoPowerOFFmanagement.SelectingNOdisablestheAuto
PowerOFFmanagement.PresstheENTERbuttontosavethesetting.
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SetBeeperON/OFF
WhentheLCDdisplaysBEEP,presstheENTERbutton.Usethe▲and▼buttonstoselecteither
YESorNO.SelectingYESenablestheaudiblebeeper.SelectingNOdisablestheaudiblebeeper.
PresstheENTERbuttontosavethesetting.
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DecimalPoint/CommaSelection
WhentheLCDdisplaysDEC,presstheENTERbutton.Thenumericalstructureforthedecimal
pointis“.”,asusedintheUnitedStates.Inothercountries,thedecimalfunctionisrepresented
bythe“,”commasymbol.Usethe▲and▼buttonstoselectUSAorEURO.SelectingUSA
enablesthedecimalpointformat.SelectingEUROenablesthecommaformat.PresstheENTER
buttontosavethesetting.
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SDMemoryCardFormat
WhentheLCDdisplaysSD‐F,presstheENTERbutton.Usethe▲and▼buttonstoselectYESor
NO.SelectingYESallowstheSDcardtobeformatted.SelectingNOskipstheformattingutility.If
YESisselected,presstheENTERbuttontoconfirmthattheSDmemorycardwillbeformatted.
ConfirmingwillclearalloftheexistingSDcarddataandtheformattingutilitywillrun.
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SelectingUnitsofMagneticField
WhentheLCDdisplaysUNIT,presstheENTERbutton.Usethe▲and▼buttonstoselectmTor
G.IfmTisselected,themagneticfieldunitswillbesettomilli‐Tesla.IfGisselected,the
magneticfieldunitswillbesettoGauss.PresstheENTERbuttontosavethesetting.
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EXTECHINSTRUMENTS
7SDL900‐en‐GB_V1.45/15
DataloggerMode
PreparationfortheDataloggerFunction
InserttheSDcardintotheSDcardsocket.IftheSDcardhasneverbeenusedwiththeSDL900,
pleaseformatit(seethesectiontitled“SDMemoryCardFormat”intheSetModeabove).
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Note:ItisstronglyrecommendedthatmemorycardsbeformattedbytheSDL900.IftheSDcard
hasproblemsuseacomputertoreformattheSDcardandtryagain.
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Ifthisisthefirsttimethemeterisbeingused,settheDateandTime(seethesection“Setthe
ClockTimeandDate”intheSetModeabove).
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AutomaticDatalogging
1. Selectthesamplingtime(rate)asdescribedintheSetModesectionabovetoavalue
otherthanzero.
2. PressandholdtheLOGbuttonfor2seconds.ThemeterwillflashtheDATALOGGERicon
attheselectedsamplingrate,indicatingthatreadingsarenowbeingautomatically
recordedtotheSDcard.
3. Ifacardisnotinsertedorifthecardisdefective,themeterwilldisplay‘EMPTY’andexit
theDATALOGGERmode.Inthiscase,switchthemeterOFFandtryagainwithavalidSD
card.
4. PausethedataloggerbypressingtheLOGbuttonmomentarily.TheDATALOGGERicon
willstopflashingandthesampleratewilldisplayforashorttime.Toresumelogging
simplypresstheLOGbuttonagain.
5. ToterminatethedataloggingsessionpressandholdtheLOGbuttonforatleast2
seconds.
6. WhenanSDcardisusedforthefirsttimeafolderiscreatedonthecardandnamed
MGA01.Upto99spreadsheetdocuments(eachwith30,000readings)canbestoredin
thisfolder.
7. Whendataloggingbegins,anewspreadsheetdocumentnamedMGA01001.xlsiscreated
ontheSDcardintheMGA01folder.Thedatarecordedwillbeplacedinthe
MGA01001.xlsdocumentuntil30,000readingsarereached.
8. Ifthemeasurementsessionexceeds30,000readings,anewdocumentwillbecreated
(MGA01002.xls)whereanother30,000readingscanbestored.Thismethodcontinues
forupto99documents,afterwhichanotherfolderiscreated(MGA02)whereanother99
spreadsheetdocumentscanbestored.Thisprocesscontinuesinthissamefashionwith
foldersMGA03throughMGA10(lastallowablefolder).


EXTECHINSTRUMENTS
8SDL900‐en‐GB_V1.45/15
ManualDatalogging
InthemanualmodetheuserpressestheLOGbuttontomanuallylogareadingtotheSDcard.
ForManualDatalogging,thesamplingratemustbefirstsetto‘0’secondsasdescribedintheSet
Modesectionabove.
PressandholdtheLOGbuttonforatleast2secondsandtheDATALOGGERiconwillappearon
theLCD;thelowerportionofthedisplaywillshowp‐n(n=memorylocationnumber1‐99).
MomentarilypresstheLOGbuttontostoreareading.TheDATALOGGERiconwillflasheachtime
adatapointisstored.
Usethe▲and▼buttonstoselectoneofthe99datamemorypositionsinwhichtorecord.
Toexitthemanualdataloggingmode,pressandholdtheLOGbuttonforatleast2seconds.The
DATALOGGERiconwillswitchoff.


Spreadsheetdataexample

RS‐232/USBPC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/instruments)are
required.
ACPowerAdaptor
Thismeterisnormallypoweredbysix(6)1.5V‘AA’batteries.Anoptional9Vpoweradaptorisavailable.
Whentheadaptorisused,themeterispermanentlypoweredandthepowerbuttonwillbedisabled.

EXTECHINSTRUMENTS
9SDL900‐en‐GB_V1.45/15
BatteryReplacement

Whenthelowbatteryicon  appearsontheLCD,thebatteriesmustbereplaced.Several
hoursofaccuratereadingsarestillpossibleinthiscondition;howeverbatteriesshouldbe
replacedassoonaspossible:
Removethetwo(2)Phillipsscrewsfromtherearofthemeter(directlyabovethetopofthe
tiltstand).
Removeandsafelyplacethebatterycompartmentandscrewswheretheywillnotbe
damagedorlost.
Replacethesix(6)1.5V‘AA’batteriesobservingpolarity.
Replacethebatterycompartmentcoverwiththetwo(2)Phillipsscrews.
Note:ThemetercanalsobepoweredbyaDC9VPowerAdapter.Themeterwillbepermanently
poweredONwhentheDCadapterisusedasthepowersupply(thepowerbuttonfunctionis
disabled).


All EU users are legally bound by the battery ordinance to return all used batteries to
collection points in the community or wherever batteries / accumulators are sold!
Disposal in the household garbage is prohibited!


EXTECHINSTRUMENTS
10SDL900‐en‐GB_V1.45/15
Specifications
CircuitCustomone‐chipofmicroprocessorLSIcircuit

Display(LCD)Size52x30mm(2.04x1.18in.)
MeasurementUnitmTMilliTesla
GGauss
MeasurementRange,DCmTRange1300.00mTx0.01mT
Range23,000.0mTx0.1mT
GRange13,000.0Gx0.1G
Range230,000Gx1G
MeasurementRange,ACmTRange1150.00mTx0.01mT
Range21,500.0mTx0.1mT
GRange11,500.0Gx0.1G
Range215,000Gx1G
Accuracy
(at23±5°C)
DC±(5%rdg.+10dgt.)
AC±(5%rdg.+20dgt.)
FrequencyResponseACMeasurement:50Hz/60Hz
SensorHallSensor
DataloggerSamplingTime
andSettingRange
Auto1secondto3600seconds(withthesamplingrate
setto‘1’secondsomedatapointscouldbelost)
ManualPushdataloggerbuttontosavedata(setto‘0’
seconds)
Dataerrornumber≤0.1%no.oftotalsaveddatatypically
FieldDirectionUniaxial
DisplaySamplingTimeApprox.1second
OperatingTemperature0to50°C(32to122°F)
OperatingHumidityLessthan85%R.H.
DataOutputRS232/USBPCserialinterface
PowerSupply6xAlkalineorHeavyduty1.5VAAbatteries