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 


USER MENU TTSeriesLRManual
Page07

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

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 


OPTION MENU TTSeriesLRManual
Page09

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SetTemp/Pressure 
DelLastResultTemperature: 16°C 
ClearMemoryBarometric
Pressure:

SetTemp/Pressure1000mbar 
StartRecordingPressENTER MaxSetting: 400°C 
PrintResults1200mbar 
PCConnectionMinSetting: ‐50°C 
Exit850mbar 
OptionMenu 
 
Beforedataloggingselectthecorrectunitinmeasurement mode.
ReviewResultsRecordOption 
DelLastResultRecordevery 
ClearMemory00 Min. 10 Sec. 
SetTemp/PressureMaxSetting: 59:59 
StartRecordingMinSetting: 00:01 
PrintResultsPress ENTER Dataloggingin
MeasurementMode

PCConnection 
ExitTostopdataloggingpressMENU 
 
ReviewResultsStoredreadingswillbe
printedonthethermal
printer.
DPMeasurementnolonger
supplythermalprinters.

DelLastResult 
ClearMemory 
SetTemp/Pressure 
StartRecording 
PrintResults
PCConnectionPressENTER 
Exit


TTSeriesLRManual
Page10OPTION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.

Softwaremustbeinstalled.EnsurethecableisconnectedtothePCviatheD‐typeconnector.
ConnecttheplugtotheRS232socket.
ReviewResultsPCCommunication 
DelLastResultDoubleclickthemmupload
icon.Awindowwillappear
onscreen,selectthecomm.
portandclicktheUpload
option.Anotherwindowwill
appearonscreen.Givethe
fileaname;choosewhich
foldertosaveitinandthen
presssave.Thewindowwill
closeandaprogressbarwill
appearonscreen.Whenthe
dataisdownloaded,the
message‘Recordsreceived
successfully’willappear,click
OK.Closethedownloading
softwareandopenthefile
usingNotepad.

ClearMemory 
SetTemp/Pressure 
StartRecording 
PrintResults 
PCConnection
ExitPressENTER 
 
Unplugtheconnectorand
pressMENUtoreturnto
OptionMenu



CONVERSIONTABLES TTSeriesLR Manual
Page11

Pressure:
Pambar mmH2OinH2OmmHg inHg PSI
Pa1100.0 9.806 249.1133.3 3385 6892
mbar0.01010.098 2.4911.333 33.85 68.92
mmH2O0.10210.20 125.4013.60 345.42 702.8
inH2O0.0040.402 0.039 10.535 13.51 27.67
mmHg7.501x10‐30.750 0.074 1.868125.64 51.70
inHg2.953x10‐40.029 2.895x10‐30.0740.039 12.305
PSI1.451x10‐40.014 1.423x10‐30.0360.019 0.4338 1
 
Volume:
m3/secm3/hr l/sec cfm
m3/sec10.0002 0.001 0.0004
m3/hr360013.6 1.699
l/sec999.970.2777 10.4719
cfm2118.880.5885 2.1189 1

Velocity:
m/secft/min
m/sec10.005
ft/min 196.851
 
AirVelocityCalculationsusingS.IScales:
Fornon‐standardairconditions: V=1.291 xPT1013.25 x T x Pv
V=Velocityinm/sec B293
PT=PitotTubeFactor(forEllipsoidaltype1.000)
B=Barometricpressureinmbar
T=Absolutetemperaturein°K(=tin°C+273wheret=airstreamtemperature)
Pv=VelocitypressureinPa

AirVelocityCalculationsusingImperial Scales:
Fornon‐standardairconditions: V=4006 xPT 30x T x Pv
V=Velocityinft/min B528
PT=PitotTubeFactor(forEllipsoidaltype1.000)
B=BarometricpressureininHg
T=Absolutetemperaturein°R(=tin°F+460wheret=airstreamtemperature)
Pv=Velocitypressureinwg


TTSeriesLRManual
Page12DUCTTRAVERSEPOINTS

PrincipleofOperation:
PitotHead


VelocityPressure*=TotalPressure–StaticPressure

*CalculatedbytheMicromanometer
ThenoseofthePitotTubeshouldface
directlyintotheairstreamthustheTotal
Pressureflowsdowntheinnertubewhich
isconnectedtotheSignalInport.
Thestaticholesarepositionedaroundthe
sideofthePitotTubeandleadintoan
outertube.Thisisconnectedtotheblack
tubingwhichinturnisconnectedtothe
Referenceport.
LogLinearRuleforTraversePointson3Diametersina
CircularDuct:


Ideally traversepoints shouldbeatleastsix
ductdiametersawayfromanybendor
obstructioninthesystem.
ThePitotTubeshouldbeinsertedatright
anglestothewallsoftheductsand
measurementsaretakeninthepositions
showninthediagrams(left).
Thedirectionalpointercanbeusedto
ensurethatthePitotTubeheadisparallel
totheductwalls.
AlternativeMeasuringPointsandTraverseLines
RelativetoSideLengthsforRegularDucts:



0.061D
0.235D
0.563D
0.437D
0.765D
0.939D
0.074D 0.288D
0.5D
0.712D
0.926D
0.032D
0.135D
0.321D
0.679D
0.865D
0.968D
D
TP
SP

DOWNLOADINGDATA TTSeriesLR Manual
Page13

Important:OnlyuseagenuinecableandCD Rom fromDPMeasurement.
Ifanyotheraccessoriesortheincorrectdownloadingsoftwareareusedthenthe
guaranteeontheinstrumentandtheaccessoriesbecomesnullandvoid.
Allchargesapply.
DownloadData:Softwaremustbeinstalled.
EnsurethatthecableisconnectedtothePCviatheD‐typeconnector.
ConnecttheplugtotheRS232socket.
Doubleclickthemmuploadicon.Awindowwillappearonscreen,selectthe
comm.portandclicktheUploadoption.Anotherwindowwillappearonscreen.
Givethefileaname;choosewhichfoldertosaveitinandthenpresssave.The
windowwillcloseandaprogressbarwillappearonscreen.Whenthedatais
downloaded,themessage‘Recordsreceivedsuccessfully’willappear,clickOK.
ClosethedownloadingsoftwareandopenthefileusingNotepad.

MAINTENANCE&CALIBRATION TTSeriesLR Manual
Page13


Maintenance:TherearenouserserviceablepartsintheTTSeriesMicromanometers.
Withtheexceptionofdrycellbatteriestherearenoconsumableparts.
Iftheinstrumentisdamagedorrequiresservicing,itshouldbereturnedtothe
BuckinghamEnglandfactory.

Calibration:













AllTTSeries instrumentsarecalibratedagainstequipmenttraceabletoNational
Standards.Itisgoodpracticetohavetheinstrumentcalibratedandcheckedat
leastonceayear.
TheBuckinghamEnglandfactoryoffersacalibrationservice:





DPMeasurement
Unit11,TopAngel,BuckinghamIndustrialPark
Buckingham,England.MK181TH
Tel/Fax:+44(0)1280817122
www.ttseries.comemail:[email protected]




ManufacturedintheUnitedKingdom.


TTSeriesLRManual
Page14SPECIFICATIONS

Models:Range/Resolution:
570S
570M
570A
570B
570C
570D
Pressure:
KPa±0to999Pa±1.00to7.50Kpa
mmH2O±0to9.99±10.0to99.9±100to750
inH2O±0to9.99±10.0to30.0
mbar±0to0.99±10.0to75.0 
 
Velocity1:
m/sec1.3to99.9  
ft/min256to19,600 
 
Accuracy:
Pressureat20°CandVelocity1at16°C,1000mbar:
Readings<100counts±2counts.Readings>100counts±1%ofreading±1count
 1UsinganEllipsoidalPitotStaticTube

GeneralSpecifications:
RecommendedOperationalLimits: 0°to50°C(32°to123°F)
SpanStabilityversusTemperature: 0.1%ofrangeinuseper°C(per2°F)
ZeroDrift:Negligibleduetoautozerosystem.
Whenautozerosetat60secintervals(2minutewarmup).
ZeroSystemAccuracy:±0.05Pascaltypical
OrientationEffect:(any45°change)0.1Pascaltypical
OutputSocket:RS232(baudrate9600)
DataLogging:Upto2500 anyunits.
Software:DownloaddatatoPCinverybasicform.
PowerSource:Drycell(MN1604,PP3)orRechargeable.
SystemAirLeak:0.1ml/minutea5Kpa(typical)
SafeLine/DifferentialPressure: 15KPa
StorageTemperatureLimits: ‐5°to+50°C
Weight:555grammeswithbattery.
Dimensions:45x92 x185 mm.
StandardAccessories:2mmx6mmtubingadaptors(4)
3mx2mmboreflexibletubing(2)
Calibrationcertificate
Instructionmanual
Necksling
Softlinedcase
OptionalExtras:BasicsoftwaretodownloaddatatoPC
PitotStaticTubes
RS232leadforPC
Rubberholster
DPMeasurement
Unit11,TopAngel,BuckinghamIndustrialPark
Buckingham,England.MK181TH
Tel/Fax:+44(0)1280817122
www.ttseries.comemail:[email protected]

IntheinterestofcontinuousproductdevelopmentandimprovementDPMeasurementreservetherighttoamendspecificationsandto
discontinuemodels,featuresandcoloursoftheTTSeriesMicromanometersatanytimewithoutpriornotice
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