Extech Instruments SD750 Manuale utente

USERGUIDE

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3‐ChannelPressureDatalogger

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ModelSD750

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SD750-EU-EN V1.6 08/13

Introduction

CongratulationsonyourpurchaseoftheExtechSD750PressureDataloggerforusewith2‐wire

pressuretransducers(optionallyavailable).Thismeterdisplaysandstorespressuremeasurement

dataovertimestoringtheinformationonaSDcardwhosedatacanthenbedownloadedtoaPC.

Thismeter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

MonitorPressureLevelsfromthreeseparatesources

Dataloggerdate/timestampsandstoresreadingsonanSDcardinExcel®formatforeasy

transfertoaPC

RS232serial16‐bitoutputstream

Selectabledatasamplingrate:5,10,30,60,120,300,600secondsandAUTO

Lowpowerconsumption,longbatterylife

ACpoweradaptor(included)

Forusewith2‐wirepressuretransducers(optionallyavailable)

SD750-EU-EN V1.6 08/13

MeterDescription

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LCDDisplay

Channel1PressureReading

Channel2PressureReading

Channel3PressureReadingDisplay

Unitofmeasureforallchannels

Protectivecompartmentdoor(side)

LOG(ENTER)button

SETbutton

▼

downarrowbutton

10.

▲

(TIME)uparrowbutton

11.

Channel1transducerinput(4‐20mA)

12.

Channel2transducerinput(4‐20mA)

13.

Channel3transducerinput(4‐20mA)

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Leftsideview(behindprotectivedoor)

14.

ACpoweradaptorjackforsuppliedadaptor

15.

Resetbutton(pressifdisplaylocks)

16.

RS‐23216‐bitdatastreamoutput

17.

SDmemorycardsocket

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Note:

Thebatterycompartment,tiltstand,andwallmountaccessholes,notpictured,are

locatedontherearofthemeter.

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11 12 13

SD750-EU-EN V1.6 08/13

GettingStarted

MeterPowerNotes:

oTheinternalbatteries(6x1.5VAAA)maintaintheclocktime/dateaccuracy.

oTheACadaptorpowerstheunitforallotheroperation.

oTimeandDateiskeptaccurateevenwhentheACadaptorisdisconnectedaslongas

freshbatteriesareinstalled.

oFornormaloperation,pleaseinstallbatteriesANDconnecttheunittoanACsourcevia

theACadaptor.

oTheunitdoesnothaveapowerswitch.

BatteryWarning,InstallationandReplacement

1. Whenthe lowbatteryiconappearsinthedisplay,thebatteriesareweakandshould

bereplacedassoonaspossible.

2. Toreplaceorinstallbatteries,removethePhilipsheadscrewthatsecurestherear

batterycoverandliftoffthecover.

3. Replacethesix(6)‘AAA’batteries(usealkaline,heavydutytype),observingpolarity.

4. Replaceandsecurethecover.

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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.

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OtherBatterySafetyReminders

oNeverdisposeofbatteriesinafire.Batteriesmayexplodeorleak.

oNevermixbatterytypes.Alwaysinstallnewbatteriesofthesametype.

SD750-EU-EN V1.6 08/13

MountingandWiring

oTheSD750canbeplacedonatabletopusingthesuppliedtiltstand,itcanbewall

mountedusingtherearmountingaccessholes,oritcanbelaidflatonadesktoporother

surface.

oUptothree4‐20mADCpressuretransducers(two‐wire)canbeconnectedtothebottom

oftheSD750asshowninthediagrambelow.

oWiringfor2‐wiretransmittersmustbeconfiguredexactlyasshowninthediagram.Only

thetwoterminalsontherightforeachchannelgrouparetobeused.Thetwoterminals

ontheleftforeachchannelgroupareunused.

oSignalpositive(S+)andPowerpositive(V+)areconnectedtothesameterminalasshown

inthediagrambelow.Signalnegative(S–)andPowernegative(V‐)areconnectedtothe

sameterminalasshownbelow.

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CH1 CH2 CH3

V+ V-

S+ S-

V+ V-

S+ S-

V+ V-

S+ S-

SD750-EU-EN V1.6 08/13

SetMode

Beforetakingmeasurementsanddatalogging,theSD750mustbeconfiguredtomatchthe

applicationandtransducersinquestion.TheSETmodeisusedtoaccomplishthefollowing:

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oFormataSDmemorycard

oSettheclockdateandtime

oSetthesamplingtime(dataloggingcapturerate)

oSetthebeepersoundON/OFF

oSetthemetertouseadecimal(US)oracomma(EU)forreadingsstoredontheSDcard

oSettheRS232dataoutputstreamON/OFF

oSetCH1,CH2,andCH3pressuresensorparameterstomatchthetransducer(s)beingused

oSetthePressureunitofmeasure(allchannelsusethesameunitofmeasure)

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Note:ThedataloggerfunctionmustbeswitchedOFFbeforeattemptingtoenterSETmode.

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SETMODEMENU

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ToentertheSETmode,pressandholdtheSETbuttonfor>2seconds,andthenrelease.‘SET’

willflashquicklyonthedisplayandthesymbolforthefirstMenuitemSdF(formatSDcard)

willappear.Followthestepsbelowtonavigatethemenutreeandtomakeandsavechanges

toparametersettings.

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Note:IntheSETmode,ifnobuttonispressedwithin5seconds,theloggerwillexittheSET

modeandreturntothestandardmodeofoperation.

1. SdF:FormattheSDcard

Usethe▲buttontoselectyESorno.Toformat(andcompletelyerase)anSDcardselect

‘yES’andthenpressEnter.Theformattingprocesswillbegin.Toskipthisstepwithout

formattingthecard,select‘no’andthenpressSETtoadvancetothenextparameter.

2. dAtE:Setthedateandtime

Usethe▲or▼buttonstoadjusttheYear/Month/Day/Hour/Minutes/Seconds.Usethe

Enterbuttontostoreandtostepthroughtheavailablefields.Whendone,PressSETtostore

thesettingsandtoadvancetothenextparameter.

3. SP‐t:Setthesampletime(dataloggingcapturerate)

Usethe▲buttontoselectthedesiredsamplerate.Theoptionsare:5,10,30,60,120,300,

600secondsandAUTO.InAUTO,areadingwillbestoredonlywhenthereisavaluechangeof

±10digits.PressENTERtostorethesettingandtoadvance.



SD750-EU-EN V1.6 08/13

4. bEEP:SetthebeeperONorOFF

Usethe▲buttontoselectONorOFFandthenpressEntertostorethesettingandto

advance.

5. dEC:SettheSDcarddecimalcharacter

Usethe▲buttontoselectUSA(fordecimalpointusage)orEuro(forcommausage)and

pressENTERtostorethesettingandtoadvance.

6. rS232:SettheRS232dataoutputstreamON/OFF

Usethe▲buttontoselectONorOFFandthenpressENTERtostoretheselectionandto

advance.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the

extechwebsitewww.extech.com)arerequired.

7. tyPECH1:SetChannel1PressureSensorrange

Theselectedrangemustmatchtherangeforagiventransducer.Usethe▲buttontoselect

2,5,10,20,50,100,200,or400barandthenpressENTERtostorethesettingandto

advance.

8. tyPECH2:SetChannel2PressureSensortype(sameprocedureasforChannel1above)

9. tyPECH3:SetChannel3PressureSensortype(sameprocedureasforChannels1and2)

10. unit:Settheunitofmeasureforallchannels

Usethe▲buttontoselectaunitofmeasure.Allchannelssharethesameunitofmeasure.

TheoptionsareBAR,PSI,kg/cm2,mmHG,inHG,mH2O,inH20,ATP(atmospheres),andkPa.

11. ESC:Exitthesettingmode.PresstheSETbuttontoreturntonormaloperation.

SystemRESET

IfaconditionappearswheretheCPUdoesnotrespondtokeystrokesorthemeterdisplay

seemsfrozen,presstherecessedRESETbuttonontheleftsideofthedataloggerbehindthe

protectivedoortoreturnthemetertoaworkingstate(insertapapercliporsimilarpointed

objecttopresstheRESETbutton).

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theextechwebsite

www.extech.com)arerequired.

SD750-EU-EN V1.6 08/13

Measurements

Whenthemeterisproperlypowered,mounted,configured,andwiredtothetransducersas

describedearlier,themetercanbegintobeusedtoaccuratelydisplaypressurereadings.

Themeter’sLCDshowstheChannel1inputreadingonthetop,theChannel2readinginthe

center,andtheChannel3readingonthebottomasshownbelow.Ifthex100indicatoris

flashingonthedisplay,multiplythedisplayedreadingbyafactorof100toobtainthecorrect

reading.

TheunitofmeasureshowntotherightoftheChannel2readingappliestoallchannels.Select

theunitofmeasureasdescribedintheSETMODEsection.



Channel 1

Channel 2

Channel 3

UNITS

SD750-EU-EN V1.6 08/13

Datalogging

1. OpentheleftsidedoorandinsertanSDcard

SDConsiderations:

oTheSDcardshouldbeatleast1GBincapacity.4GBisthemaximumsizerecommended,

althoughacardofupto16GBcanbeaccommodated.

oDonotusememorycardsformattedbyothermetersorcameras.UsetheSDcard

formattingprocedureincludedintheSETMODEsectionofthismanual.

oIfaSDmemorycardisnotinstalled,anerrormessagewillappearinthedisplay.

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. ProgramthemeterasdescribedintheSETUPMODEsectionofthisguide.

3. PresstheLOGGERbuttonfor>2secondstobeginlogging.‘DATALOGGER’willappearinthe

displayandthemeterwillbeepeachtimedataisrecorded(ifbeeperisenabledinSET

mode).

4. Tostopdatalogging,presstheLOGGERbuttonfor>2seconds.‘DATALOGGER’willchange

to‘DATA’andthemeterwillcountdownthroughtherecordeddatalistreadingbyreading.



ImportantNote:NeverremovetheSDmemorycardwhilethedataloggerisrunning.



CArd

LobAt

CH-

CArd

SD750-EU-EN V1.6 08/13

SDCardDataStructure

1. WhentheSDcardisfirstinsertedintothedataloggerthefolderPSB01iscreatedonthe

card.

2. ThefirstdataloggingsessionwillthencreateafilePSB01001.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(PSB01002.xls)iscreated.Thisisrepeatedevery30,000

columnsuntilPSB01099.xls.Atthispointanewfolder,PSB02iscreatedandtheprocessis

repeated;PSB10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.

ForPCsthatdonotincludeanSDcardreader,externalSDcardreadersaregenerally

availableandcanbeconnectedtothePC’sUSBjack.

2. LaunchExcel®andopenthedatafileonthememorycardfromwithinthespreadsheet

program.Thefilewillappearsimilartotheoneshownbelow.



QuickChecktheTime,Date,andSampleRateSettings

PressandHoldtheTIMEbuttonfor>2secondsandthedisplaywillautomaticallycyclethrough

thedate,timeandsamplerateinformation.ToeditthesesettingspleaserefertotheSETmode

sectionofthisguide.



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