DPM TT Series User manual

OPTERATINGMANUAL TTSeries Micromanometer
570LowResolution
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TTSeriesLRManual
Page00CONTENTS
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LimitationsofUse 01
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KeypadControls 02
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ModeofOperation 03
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Display 04
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PressureConnections 04
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UserMenu 05‐07
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OptionMenu 08‐10
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ConversionTables 11
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DuctTraversePoints 12
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DownloadingData 13
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Maintenance&Calibration 13
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Specifications 14
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LIMITATIONSOFUSE TTSeriesLR Manual
Page01
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TTSeriesinstrumentsareintendedformeasurementoflowdifferentialairpressureinandaround
commercialandindustrialairhandlingsystems,andforusewithaPitotStaticTube.

Theinstrumentsarenotsuitableforliquidpressuremeasurement,andmustnotbeusedwith
corrosive,toxicorotherwisehazardousgases.

Theinstrumentsarenotclassified“Flameproof”or“IntrinsicallySafe”andconsequentlymustnotbe
usedwhereanexplosionhazardmayexistandarenotauthorisedforLifeSupportapplications.
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Duringnormaloperationsmallquantitiesofair(typicallylessthan0.1ml/min)maypassintooroutof
thesystemundertest:itistheuser’sresponsibilitytoconsidertheconsequencesofsuchleakage
beforedeterminingthesuitabilityoftheinstrumentforanyparticularpurpose.

Theinstrumentmustbeturnedoffbeforeitisstoredortransportedandifitistobestoredforalong
periodoftimeoristobetransportedbyair,thebatterymustberemoved.

Thereisa12‐monthguaranteeonallmanufacturedparts.
Thisguaranteedoesnotcoveranyconsumables,and/orwearandtearduringnormalorabnormaluse.
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Theguaranteebecomesnullandvoidiftheinstrumentspartshavebeentamperedwith,misused,
abusedorusedoutsidetheparameterssetoutinthemanual.

Themanufacturerwilldetermineiftheinstrumentisrepairableorrequiresreplacement;chargesmay
apply.
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TTSeriesSTDManual
Page02KEYPADCONTROLS
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ENABLEProtectsagainstaccidentalswitching‘on’ and‘off’oftheinstrumentspowersource.

ONUsedinconjunctionwithENABLE toswitchontheinstrument.
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OFFUsedinconjunctionwithENABLE toswitchofftheinstrument.
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FAST
SLOW
Smoothesouttheresponsetoappliedpressurechanges. Timeconstant:
Fast=0secSlow1 =5sec Slow2=10secSlow3=15sec Slow4=20sec
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UNITSChangestheunitofmeasurement.
Theunitsarearrangedinloopformationasfollows(modeldependent):
Kpa→mmH2O→inH2O→mbar→m/sec→ft/min→Kpa
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STOREStoresreadingsmanually.
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MENUUsedtoaccesstheOptionMenu fromoperationmode.

yandzOperatethebacklight.
Selectanappropriatefunctionduringmenuoperation.
Setdigitsandvaluesinmenuoperation.
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ZEROOverridesthetimeperiodoftheautozerosystem.
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Backspace.
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ENTERAcceptscommandsduringmenuoperation.
UsedinconjunctionwithENABLEandONtoaccesstheUserMenu.
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MODEOFOPERATION TTSeriesLR Manual
Page03
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On/Of
f
:
PressandholdENABLEthenpressONorOFFasappropriate.
AutoZero:
Thecyclewillbeginassoonastheinstrumentisswitchedon.Thisisfactoryset ata30
secondintervaluponswitchonandthereafterat60secondintervals.
TochangethistimingseeUserMenupage05.
Theinstrumentcontainsaminiaturesolenoidvalve,whichisolatesthepressuresensors
duringautozero.Thevalveemitstwoclearlyaudibleclicks,whichsignalthestartandendof
theautozeroprocess.
BatteryLow:
Thebatteryconditionismonitoredeverytimetheinstrumentautozeroes.
Whenthe‘batterylow’warningappears,thebatterymustbereplacedimmediately,
otherwisethereadingsobtainedwillbeunreliable.
Ifatanytimethereadingsseemsuspect,checktheconditionofthebatterybyzeroingthe
instrumentmanuallyusingZERO.
Ifindoubtreplacethebattery.Forrechargeableinstrumentschargetheinternalbattery
withthechargersupplied.
Units:
Theunitofmeasurementisshownontherighthandsideofthedisplay.
Beinganautoranginginstrument,thecorrectresolutionandthedecimalpointwillbe
displayedaccordingtothepressurebeingapplied.
FASTSLOW:
Somepressurisedcircuitsexhibitpressureandvelocityfluctuations,whichcanbe
disconcerting;ifunacceptablefluctuationsoccur,pressFASTSLOWandverifythattheslow
indicationisdisplayedonthescreen.
Store:
Showsthenumberofreadingsstoredontheinstrument.
TostoredatamanuallypressSTOREwhiletheinstrumentisinSlow1,Slow2,Slow3orSlow4
mode:thereadingonthedisplaywillbeloggedandthecounterwillincreasebyone.
Duringdataloggingthecounterwillincreasebyoneeverytimetheinstrumentrecordsa
value.ForinformationondataloggingseeOptionMenupages08and09.
AudibleFeedback:
Whiletheinstrumentison,audiblefeedbackcanbeheardeverytimeakeyispressed.
SignalIn/Reference:
Pressureports.Theinstrumentrespondstopositive,negativeanddifferentialpressure.
RS232Port:
Islocatedbetweenthetwoports.
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TTSeriesLRManual
Page04DISPLAY
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AutoZero...Whenevertheautozerosequenceisinitiatedmanuallyoratpreset
‘AutoZero...’willbedisplayeduntilthecycleiscomplete.
Beinganautoranginginstrument,theresolutionanddecimalpointswill
changeaccordingtothepressurebeingapplied.

Slow4Showswhichmodetheinstrumentisin.
PresstheFASTSLOWkeytochangethemode.

7.7m/sShowstheunitofmeasurement.
PressUNITStotogglebetweenunitsofmeasurement.

AvgVel
4.5

Showsthe averagevelocityofthereadingsstored.
Store
10
Showsthenumberofreadingsstored.
Upto2500readingscanbestored.
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TTSeriesLRManual
Page04PRESSURECONNECTIONS
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Gauge/DuctStatic
Measurement:
ConnecttoSignalIn. LeaveReferenceopentoatmosphere.
Readingsmaybepositiveornegativedependingonwhetherthesystem
undertestisaboveorbelowatmospherepressure.

OrificePlates:ConnectupstreamtappingtoSignalInanddownstreamtappingtoReference.
Pressurereadingsshouldalwaysbepositive.
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FlowGrids:Connect+VetappingtoSignalInand‐VetappingtoReference.
Pressurereadingsshouldalwaysbepositive.

InletCones:ConnecttappingtoSignalInusing‘T’piecestojointheannulartapping
together.LeaveReferenceopentoatmosphere,ensuringthattheopenport
isshieldedagainstsignificantairmovementfromtheingoingairstream.
Pressurereadingsshouldalwaysbenegative.

TotalHeadProbe:ConnecttoSignalIn.LeaveReferenceopen.
Readingsshouldalwaysbepositive

dpm‐iPitotTube:InputthePitotTubefactor0.838.
ConnectcleartubingtoSignalInandblacktubingtoReference.
UseUNITStotoggletom/sorft/mindependinguponmodel.
Readingsshouldalwaysbepositive.

EllipsoidalPitotTube:InputthePitotTubefactor1.000.
ConnectcleartubingtoSignalInandblacktubingtoReference.
UseUNITStotoggletom/sorft/mindependinguponmodel.
Readingsshouldalwaysbepositive.

 
AutoZero...Slow4
7.7m/s
AvgVel Store
4.5 10

USERMENU TTSeriesLR Manual
Page05
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TheUserMenuisusedtoinputuservaluesandchangedefaultsettings.
ToaccesstheUserMenu,switchontheinstrumentwhileholdingdownENTER.

Page05
SetClock:Tosettheclocktolocaltimeandinputthedate inthechosenformat.
AutoZeroTime:Thisisfactorysetat60seconds. 
(forwhichtheinstrumentspecificationsarebased)
Changingthedefaultsettingwilloverridethis.
Inputting0secondswillswitchofftheautozerofunction.
AmanualzeroingfacilityisavailableseeKeypadControlspage02.

Page06
SwitchOffPeriod:Tosavebatterytheinstrumentwillswitchoffafter10minutes providingthatno
keysarepressed.Thiscanbeoverriddenbychangingthedefaultsetting.
RS232Period:Toprintoutrawdataasmeasurementsarebeingmade,eithertoathermal
printerortoaPCviatheHyperterminal.
Note:DPMeasurementnolongersupplythermalprinters.
BackLightPeriod:Toalterthebacklighttime. Useyandztoswitchonthebacklight.
Temp/Pressure:Tochangetheairstreamtemperatureandbarometricpressure.
Airstreamtemperaturesetat16°CandBarometricpressuresetat1000mbar.

Page07
SelectDateFormat:SetthedateformattoEuropeanorUSA,thetemperatureunitsto°Cor°Fand
thebarometricpressureunitstomborinHg.

Selectingfromalist:
Enteringavalue:
Useyandztoscroll.PressENTERtoselect.
UseyandztoseteachdigitorvaluethenpressENTER.

SetClockSelectDateandTime 
AutoZeroTimePress ENTER Minutes? 16 
SwitchOffPeriodHours? 14 
RS232ResultPeriodDate? 26 
BackLightPeriodMonth? 10 
Temp/PressureYear? 10 
SelectDateFormatUserMenu 
Exit 
 
SetClockAutoZeroPeriod 
AutoZeroTime060Seconds 
SwitchOffPeriodPressENTER MaxSetting: 600 
RS232ResultPeriodMinSetting: 010 
BackLightPeriodToswitchoffinput: 000 
Temp/PressureUserMenu 
SelectDateFormat 
Exit 


TTSeriesLRManual
Page06USERMENU

Selectingfromalist:
Enteringavalue:
Useyandztoscroll.PressENTERtoselect.
UseyandztoseteachdigitorvaluethenpressENTER.

SetClockSwitchOffPeriod 
AutoZeroTime00Minutes 
SwitchOffPeriodMaxSetting: 60 
RS232ResultPeriodPressENTER MinSetting: 00 
BackLightPeriodToswitchoffinput: 00 
Temp/PressureUserMenu 
SelectDateFormat 
Exit 
 
SetClockRS232ResultPeriod 
AutoZeroTime0000Seconds 
SwitchOffPeriodMaxSetting: 3600 
RS232ResultPeriodMinSetting: 0005 
BackLightPeriodPressENTER Toswitchoffinput: 0000 
Temp/PressureUserMenu 
SelectDateFormat 
Exit 
 
SetClockBackLightPeriod 
AutoZeroTime015Seconds 
SwitchOffPeriodMaxSetting: 250 
RS232ResultPeriodMinSetting: 000 
BackLightPeriodPermanentlyon: 000 
Temp/PressurePressENTER UserMenu 
SelectDateFormatUseyandztoswitchon
thebacklight.

Exit 
 
SetClockDefault 
AutoZeroTimeTemp/Pressure 
SwitchOffPeriodTemperature: 16°C 
RS232ResultPeriodBarometric
Pressure:

BackLightPeriod1000mbar 
Temp/PressureMaxSetting: 400°C
1200mbar

SelectDateFormatPressENTER 
ExitMinSetting ‐50°C
850mbar

 
UserMenu 
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USER MENU TTSeriesLRManual
Page07
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Selectingfromalist:
Enteringavalue:
Useyandztoscroll.PressENTERtoselect.
UseyandztoseteachdigitorvaluethenpressENTER.
 
SetClockDateFormat 
AutoZeroTimeDD/MM/YY 
SwitchOffPeriodMM/DD/YY 
RS232ResultPeriodExit 
BackLightPeriodSelectTempUnits 
Temp/PressureCentigrade 
SelectDateFormatFahrenheit 
ExitPressENTER Exit 
SelectPresUnits 
mbar 
InHg 
Exit 
UserMenu 
 


TTSeriesLRManual
Page08OPTIONMENU
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TheOptionMenuistotemporarilychangedefault settings.
ToaccesstheOptionMenu,pressMENUwhentheinstrumentisinoperationmode.

Page08
ReviewResults:Viewstoreddataintheformoftime,measuredvalueandunitofmeasurement.
Providingthestoredreadingsareinthesameunit,theaveragevaluewillbe
shownatthebottomofthescreenasthecursormovesdown.

DeleteLastResult:Deletesthelaststoredvalue.

ClearMemory:Deletesallstoreddata.


Page09
SetTemp/Pressure:Changetheairstreamtemperatureandbarometricpressure.

StartRecording:Thisfeatureisusedfordatalogging.
Upto2500readingscanbestored.

PrintResults:Printmeasurementsusingathermalprinter.


Page10
PCConnection:TodownloadstoreddatatoaPC.
SeeDownloadingDatapage13.

Selectingfromalist:
Enteringavalue:
Useyandztoscroll.PressENTERtoselect.
UseyandztoseteachdigitorvaluethenpressENTER.

ReviewResults14:57:02 40.0 Pa 
DelLastResultPressENTER 14:57:13 79.9 Pa 
ClearMemory14:57:27 160 Pa 
SetTemp/Pressure14:57:53 400 Pa 
StartRecording14:58:04 800 Pa 
PrintResultsAvg(1) 40.0 Pa 
PCConnectionUseyandztoviewmore
results
ToreturntoOptionMenu
pressENTER

Exit 

ReviewResultsDeleteLastResult 
DelLastResultDone 
ClearMemoryPressENTER ToreturntoOptionMenu
pressENTER

SetTemp/Pressure 
StartRecording 
PrintResults 
PCConnection 
Exit 

ReviewResultsCLEARMEMORY 
DelLastResultAreYouSure 
ClearMemoryENTER=Yes 
SetTemp/PressurePressENTER MENU=No 
StartRecordingMemoryCleared 
PrintResultsPressAKey 
PCConnectionOptionMenu 
Exit 
