Ingenieros especialistas en Acústica y Vibraciones Insurgentes Norte N° 148-B Col. Santa María la Ribera 06400 México, D. F. Tel/Fax: 5547 4450 y 5547 4678 R.F.C. IAT 990528 948

México D.F. a 29 de Marzo de 2012

VI-1201

Dr. Vicente Rendón Hidalgo PRESENTE

COTIZACIÓN

CANT MODELO DESCRIPCIÓN PRECIO

UNITARIO (USD)

PRECIO TOTAL (USD)

1

N-140

ANALIZADOR DE ESPECTRO NORSONIC N-140

Sonómetro Integrador y de Impulsos con Circuitos de ponderación A, C y Z de acuerdo, Clase de exactitud 1, con detectores paralelos RCM y detectores de pico; intervalo dinámico de 120 dB; luz en la pantalla; memoria interna hasta por 32 Mbytes y tarjeta intercambiable SD con 1 Gbytes; interfase serial USB 2.0. Incluye Micrófono de condensador N-1225; Preamplificador N-1209; Pantalla anti-viento N-1451; Cable de interfase USB; Paquete de programación para transferencia de datos a PC NorXfer N-1020/140; Estuche N-1331 y 3-años de garantía. Incluye: Opción1. Convierte al Sonómetro N-140 en un Analizador de Espectro de 1/1-octavas en tiempo real dentro del intervalo de frecuencia de 0,5 Hz a 16000Hz. Opción3. Extensión a filtros de 1/3-octavas en el rango de 0,4 Hz a 20000Hz. Opción4. Cálculos estadísticos para las curvas de ponderación A, C y Z además de todas las bandas de frecuencia. Opción 6. Perfil temporal básico con representación gráfica y almacenamiento de Nivel de presión sonora contra tiempo. Cable N-4514a con 2m de longitud, conector BNC para una salida en AC.

$ 7,290.00 $ 7,290.00

Ingenieros especialistas en Acústica y Vibraciones Insurgentes Norte N° 148-B Col. Santa María la Ribera 06400 México, D. F. Tel/Fax: 5547 4450 y 5547 4678 R.F.C. IAT 990528 948

CONDICIONES COMERCIALES

El precio de los instrumentos es LAB en la Ciudad de México, está expresado en Dólares Americanos y no incluye el I.V.A. El tipo de cambio US Dólar-Peso mexicano se acordará al momento de elaborar la factura y realizar la entrega del equipo.

Para fincar el pedido se requiere una orden de compra.

Tiempo de entrega es de cuando más 30 días, sujeto a la confirmación de la planta una vez formalizado el pedido, a través de la orden de compra.

ATENTAMENTE

Ing. Gonzalo Flores Ortega

5

The instrument platform

By listening tokeycustomersandour longexperi-

ence in designing sound levelmeters, every effort

hasbeenmadetodesignarugged,smallandlight-

weight,yetpowerfulinstrumentplatform.

User friendly The large backlit display with a mirror effect is

excellent to read in sunlight. The backlight is only

neededindarkenvironments.

Theinstrumentisdesignedtobeoperatedbythe

same hand that holds the instrument. There is no

need for a stylus. Real keys ensures tactile feed-

backtotheuser.Thedustandsplashproofrubber

coversfortheconnectorsandSDcardtogetherwith

the high friction coating on rear cover ensures an

optimumgripandusercomfort.A rangeof factory

setup together with the possibility for the user to

createhis/herownsetupsminimisetheriskofmaking

mistakeswhenpreparinguptheinstrumentpriortoa

measurementrun.

Memory – Storage handlingThe instrument contains both an internal memory

andanexchangeableSDmemorycard.Theinternal

memoryfeaturesthesamestructureastheSDcard,

butitismainlyintendedforhigh-speedsamplingappli-

cations.Abackupcopyofthecurrentmeasurementis

madeeverytwominutes.Thisensuresthatifapower

interruptoccurs,amaximumoftwominutesofdata

maybelost.Themeasurementisalsoautomatically

savedwhenabatterylowwarningisgiven.Aspecial

featureismakingtheinstrumenttoautorestartand

continuetomeasureafterapowerfailurecondition.

This is especially useful for long term monitoring

applications.

11

On-board noise generatorThe Nor140 is equipped with an on-board noise

generator supplying both white and pink

noise. During the level and reverberation time

measurements,thegeneratoristurnedonandoffin

synchronizationwiththeactualmeasurements.

Complete reportsThe Nor140 building acoustics measurements are

seamlessly transferred to a PC for further post-

processing.Thefullsoundinsulationreportisgener-

atedbyuseof theNorBuild softwarepackage,and

thefinal reportsheetsarecalculated inaccordance

withISO140/717,ASTMorothernationalstandards.

Remote measurement controlForfullPCcontroloftheactualmeasurementprocess,

the NorBuild software may be extended with the

CtrlBuildmodule.Byuseofthismodule,themeas-

urementsmayevenbemadebyscanning through

the frequency rangeusing1/3-octavebandfiltered

noise.Thisfeatureishandywhenbackgroundnoise

is high compared to themeasured receiving room

levels.

Alternatively,theCtrlBuildmodulewillenabletwo

individualNor140instrumentstobesynchronisedto

formadedicateddual-channelmeasurementsystem

forsoundinsulationtests.

Wireless measurement systemBy connecting the Nor520 Bluetoothe transceiver,

oneNor140maybeusedasonewirelessmeasuring

channel in theNor1516Bwirelesssound insulation

system.ByusingtwoseparateNor140 instruments

insuchasystem,theoperatorgetsauniquewireless

measurementsystemthatperformscompletesound

insulationmeasurements in thefieldwithoutall the

hassleandproblemsoflongmicrophoneextension

cables.

Swept-Sine measurement techniqueThe recent ISO18233 Standard opens up for use

of alternative measurement techniques for sound

insulation testing. Hence, the Nor140 is optionally

available with the new Swept-Sine measurement

method.Thisnew technique isusefulwhenmeas-

urementshavetobeperformedinbackgroundnoise

conditionswheretraditionaltechniquewillnotenable

anymeasurementstobemadeatall.

Swept-Sine techniquemay also be used for the

measurementofextremelyshortreverberationtimes.

12

Sound powerSound power level may be calculated from sound

pressurelevelmeasurementsusingalmostanytype

ofsoundlevelmeter.However,themethodsdescribed

in the different standards involve quite a lot of

calculationbefore thefinalsoundpowerfigurecan

bereported.

TheNor140supportsmeasurementsandcalcu-

lationsaccordingtoISO3746onboard.Yousimply

specify measurement surface, its dimensions, the

location of yourmeasurement object (on the floor,

againstahard reflectingwallor inacorner),apply

the correction factors and start your measure-

ment.Thesoundpowerwillthenbecalculatedand

displayedinatabularform.

For measurement in accordance to other

standards in the ISO374x series or similar stand-

ards,thePCpostprocessingprogramNorPowerisa

perfect tool. The program guides you through the

measurement process and reports the data as

described in the standard.NorPower is a valuable

toolforengineersworkingwithproductdevelopment,

product control or certification. A special software

extension allows the user to remotely control

theNor140, themicrophoneboomNor265and the

wholemeasurementprocessfromthePC.

Audiometer calibrationAudiometry is the testing of hearing ability. Audio-

metrictestsdetermineasubject’shearinglevelswith

thehelpofanaudiometer.Forreliabletestresults,it

isessentialthataudiometersareregularlycalibrated

inaccordancewiththerelevantstandards.

Nor140 can be equipped with the option for

audiometer calibration which provides the ability

foracousticalmeasurementof frequencyand level

of the test signal as well as harmonic distortion.

Measurementtakeonly2secondsandisperformed

in an intuitiveway presenting the 1/3 octave band

spectrum together with a result table containing

valuesforfrequencyofthetesttone,levelofthetest

tone,LZ,eqandharmonicdistortion.

Other applications

Speech intelligibility – STIPAThespeechtransmissionindex,STI,hasshowntobe

avaluabletoolforobjectiveassessmentofthespeech

intelligibility.ThebasisfortheSTI-indexisthatspeech

intelligibility is toa largeextent isbasedon theslow

amplitudemodulationofoctavebandsoundlevelsdue

totheacousticenvironmentinthetestarea.

Asimplifiedversionof theSTI-metric,knownas

STIPA, is anoption in theNor140 instrument. The

method is made according to the requirements

in IEC60268-16 (2003-05): Sound system equip-

ment – Part 16: Objective rating of speech intel-

ligibility by speech transmission index. The option

includes an audio-CD with the required excitation

signal. The STIPA-method is suitable for assess-

ingspeechintelligibilityinroomsorauditoriaaswell

asforpublicaddresssystems.Itmayingeneralbe

used as a replacement for RASTI which normally

shouldbeappliedonlyforroomacousticmeasure-

ments.TheresultispresentedasaSTI-valueanda

CIS-value.Thelatterisnormallyusedforassessing

the quality of sound systems for emergency

purposes(IEC60849).

Each measurement lasts for about 13 seconds

andtheSTI-valueisdisplayedonthescreentogether

withoctave-bandlevelsandthemodulationindices.

Thisallowstheresult tobecorrectedforadditional

backgroundnoiseeitherbytheinstrumentorlaterby

post-processingthemeasureddata.

Vibration measurementsThankstoitsbroadfrequencyresponsetheNor140

issuitableforbothsoundandvibrationapplications.

Thelowfrequencyresponseextendsdownto0,4Hz

in1/3octavebandmodeandFFTmode.Theresults

canbedisplayedindBorinEngineeringUnits.

ICP® powered accelerometers can be directly

connected to the instrument without use of any

externalpowersupply.Norsonicsuppliesacarefully

selectedrangeofaccelerometers,allICP®powered,

wellsuitedforusewiththeNor140.

13

Option 1: 1/1-octave real-time fi lters

Parallel1/1-octavereal-timefilterscoveringthe0.5Hz-16kHz•frequencyrangeinonerange

AllfiltersfulfiltheIEC61260class1digitalIIRbase10•requirementsandANSIS1.11-2004Class1

120dB“one-range”eveninthefilterband•

Resultsaredisplayedbothgraphicallyandnumerically•

A-weighting(pre-weighting)featureavailableondisplayedresults•

Whenfittedwithoption1,theNor140canperformrealtime

frequencyanalysisinoctavescoveringthefrequencybands

0.5Hzto16kHzinonerange.Alimitedfrequencyrange8Hz-

16kHzcanbesetinordertoavoidlowfrequencynoise.A3Hz3rd

orderhighpassfilteristhenenabledintheanalogueinputstageto

preventoverloadduetolowfrequencynoise.Thewidefrequency

rangewithfulldynamicrangeofmorethan120dBmakesthe

instrumentwellsuitedforbothvibrationandnoisemeasurements.

Option 2: Reference spectrum with “Go/NoGo” comparison

Compareanymeasuredfrequencyspectrumwithapre-selectedreferencespectrum•

Bothupperandlowerreferencespectrumavailable•

“Go/NoGo”warningforqualitycontrolapplications•

TTLoutputsignalforautomatedsystems•

Thereferencespectrafeatureisusedforcomparisonofany

measuredfrequencyspectrumwithapre-selecteduserdefined

spectrum.Itfunctionsfor1/1-octave,1/3octaveandthespectral

weightingnetworks.Themeasuredspectrummaybecompared

toanupperlimit,alowerlimitorboth.Ifthemeasuredsignal

exceedstheboundaries,a“NoGo”warningisgivenonthescreen,

andadigitalsignalissetontheI/Oport.Thisisusefulformany

applicationssuchasproductcontrolandspectrumcomparison.

Option 2 requires that minimum option 1 be installed!

1/1-octave spectrum8 Hz - 16 kHz

1/1-octavenumeric table

1/1-octave spectrum0,5 Hz - 16 kHz

1/1-octavereference spectrum

1/3-octavereference spectrum

Optional extensions

The Nor140 may be extended with a large selection

of optional features, thereby allowing you to tailor the

instrumenttoyourspecificrequirements.Optionalfea-

turesmaybeorderedandinstalledatanytimebyjust

addinganewsetofoptioncodes.Norsoniciscontinu-

1/1-octave spectrumA-weighted

ouslyextendingthelistoffeatureswithnewoptionsand

improvementsinexistingoptionsbasedoncustomers’

requirementsandnewstandards.

Pleasevisitourwebsitewww.norsonic.comforthelatest

details.

14

Option 3: 1/3-octave real-time fi lters

Parallel1/3-octavereal-timefilterscoveringthe0.4Hz-20kHz•frequencyrangeinonespan

AllfiltersfulfiltheIEC61260class1digitalIIRbase10and•ANSIS1.11-2004Class1requirements120dB“one-range”eveninthefilterbands

Resultsaredisplayedbothgraphicallyandnumerically•

A-weighting(pre-weighting)featureavailableondisplayedresults•

Whenfittedwithoption3,theNor140canperformrealtimefrequency

analysisin1/3octavecoveringthefrequencybands0.4Hzto20kHz

inonerange.Alimitedfrequencyrangecovering6.3Hz-20kHzcan

besettoavoidlowfrequencynoise.A3Hz3rdorderhighpassfilter

isthenenabledintheanalogueinputstagetopreventoverloaddueto

lowfrequencynoise.

Thewidefrequencyrangewithfulldynamicrangeofmorethan

120dBmakestheinstrumentwellsuitedforbothvibrationandnoise

measurements.

Option 3 requires that minimum option 1 be installed

1/3-octave spectrum6,3 Hz - 20 kHz

1/3-octave spectrum0,4 Hz - 20 kHz

1/3-octave spectrumA-weighted

1/3-octavenumeric table

Option 4: Statistical calculation of LN values

Calculate7fixedLNvalues(L• 1%,L5%,L10%,L50%,L90%,L95%andL99%)

Parallelcalculationof1editableLNvalueselectablewithintherange0.1–99.9%•

Statisticalcalculationsbasedon0.2dBclasswidthscoveringtheentire130dBrange•

ParallelstatisticalcalculationonbothA-andC-/Z-weightednetworks•

Ifreal-timefiltersareinstalled(option1or3),statisticalcalculationsareavailablefortheindividual•filterbandsaswell

Option4addsstatisticaldistributiontotheNor140functionality.Thereareeight

percentilesshown,outofwhichoneisuserselectable.Theclasswidthis0.2dBoverthe

entire130dBrange.

ThestatisticaldistributioncalculationsemploystheFtimeconstantandappliestothe

spectralweightingnetworks(AandCorZ)aswellasalltheindividual1/1and1/3-octave

filterbands(ifapplicable).

Theback-erasefeature,whichdeletesuptothetenmostrecentsecondsofacquired

globaldatapriortoapauseuponresuming,updatesthestatisticsbuffersaswelltomain-

tainconsistency.Statical LN table

15

Option 6: Level versus time measurements

Measuresthetime“Profile”(levelvs.time)ofthenoisesignalwithpresettimeresolution•simultaneouslywiththeoverall“Global”measurement

Selectionofpresetintervalswithinthe1secondto199hoursintervalrange•

AutomaticlevelversustimestorageofL• Aeq,LAmaxandLCpeak(orLZpeak)

AutomaticmultispectrumstorageofL• eqandLmaxifoption1isinstalled

LevelversustimemeasurementcontinuesduringapausedGlobalmeasurement•

Markersidentifyanypause,stoporcontinueofthemeasurement•

Real-timegraphicalandnumericaldisplayofthelevelversustimeresults•

Automaticmarkers:

Apausemarkerisinsertedintothetimeprofileinpausemode.Arecorder

markerisinsertedwhentheinstrumentisdoingasoundrecording,andanoverloadmarker

isinsertedifoverloadoccurs.

Level versus Time

L(t) numeric table

Option 5: Parallel F, S and I time weightings

SimultaneousmeasurementofF,SandItimeweightings•

ParallelmeasurementofthreedifferentSPL,L• minandLmaxfunctionsbasedonF,SandItimeweightings

ParallelcalculationofL• eq,Leq,I,LEandLEIfunctionsusingnotimeconstantandItimeweightingsimultaneously

TheparallelmeasurementusingthreetimeweightingsisavailableonbothA-andC-/Z-weighted•networks

Option5enablesparallelmeasurementofalltimeconstantssimultaneously.Ifrealtimefiltersareinstalled,the

paralleltimeweightingfunctionsareavailablefortheindividualfilterbandsaswell.

16

Option 8: Sound recording

StorageofthesoundsignalitselfontotheSDcardortheinternalmemory•

Triggeredbyanexternalhand-switch,byaleveltriggerorbyamanualkeypush•

8,16or24bitaccuracy•

12or48kHzsampling•

0-96dBdigitalgain•

Referencecalibrationtonecanbeaddedatthebeginningofthefirstrecordingina•measurement

Option8allowsstoringthesoundsignalitselfontotheSDcardortheinternalmemory.

Thisoptionisespeciallyusefulforsourceidentification.Thesoundrecordingcanbetrigged

byanexternalhandswitch,byaleveltrigger(requiresoption16)orbyamanualkeypush.

Severalrecordingformatsaresupported,rangingfrom8,16or24bitandwithsamplingratesof12or48

kHz.Using48kHzsamplingandthestoredsoundsignalmaybeusedforfurtherprocessing.TheNor140

hasalargedynamicrange–exceeding120dB.Thismeansthatifyoutrytoplaybackthesignalonyour

PCyouwill–inmostcases-hearnothing!

Toovercomethisproblemaspecialdigitalgain,0–96dB,canbeaddedtothesoundrecordedsignalwith-

outaffectingthecalibrationormeasuredvalues.

Anotherusefulfeatureisthatyoumayplaya10secreferencetone-sinewave,pinkorwhitenoiseinthe

beginningofameasurementtosetareferencelevelwhenlaterreplayingrecordeddata.

Option 8 requires that minimum option 6 be installed

Option 7: Advanced Level versus time measurements

Selectionofpresetintervalswithinthe25msecto199hoursintervalrange•

25msecintervalresolutionbelowonesecondandonesecondresolutionabove•

FreeselectionofanyA-andC-/Z-weightedfunctionstobestoredateachpresetinterval•

Possibleoperatormarkersettingsduringthemeasurement•

Selectionof3differentsinglemarkersand1togglemarker•

TheenhancedtimeprofilemodeallowsloggingofLeq,Lmax,Lmin,Lpeak,LeandSPLforall

weightingnetworksandfrequencybandsfortimeconstantF,SandIinparallelifoption5

paralleltimeconstantisenabled.Theusermayselectfromonetoallavailablepara-

meterstolog.Thetimeresolutionisfrom25msloggingtomemory.Ifthefrequency

analysisoptionisinstalled,thesevaluesmaybemeasuredtoo,bothastimeprofilemulti

spectrumvaluesandasglobalvalues.

Usercontrolledsourcecoding

Withoption7,theinstrumentgetseightmarkerfunctions,whereasfourareuserdefined.

Threeofthesearesinglemarkersandoneisatogglemarker.

Option 7 requires that minimum option 6 be installed

L(t) with markers

Table with markers

Lt with recording marker

17

Option 10: Noise Generator

Produceswhiteorpinknoiseexcitationsignalswithadjustableoutputlevel•

Synchronizationofnoisesignalwithmeasurementstartandstop•

Allowsnoiseexcitationofreverberationtimemeasurementsifusedwithoption9Reverberationtime•

Thesignalgeneratoroptiongeneratesbothwhiteandpinknoise.Bothimpulseexcitationandcontinuousnoise

excitationaresupported,makingthenoisegeneratorusefulforbothreverberationtimemeasurementsaswell

assoundinsulationmeasurements.

Option 11: Building Acoustic measurement mode

ExtendstheNor140instrumentintoacompletesinglechannelbuildingacousticanalyser.•

Synchronisesexcitationinthesourceroomwiththemeasurementoperation(option10)•

Makesroomaveragingofmultiplemicrophonepositionsforsoundlevelandreverberationtime•measurementsforISO140/717users:

Calculatesthesurveyandengineeringgradeairbornesoundinsula-•tionratingsR’w,D’n,w,andD’nT,w

Calculatesthesurveyandengineeringgradeimpactsoundinsulation•ratingsL’n,wandL’nT,w

CalculatesthecorrectiontermsC,CtrandCiincludingtheextended•frequencyversions

InconjunctionwithNorBuild,caneasilycalculateratingperASTM•andotherNationalStandards

AllowsremoteuseincombinationwiththeNor1028/3CtrlBuild•softwarepackage

Canbeusedforcable-freemeasurementsusingtheNor520BluetootheTransceiver•

FulfilstherequirementsofthesurveygradeISO10052Standard•

Option11turnsyourNor140intoapowerfulsinglechannelbuildingacousticanalyser.Alltherequired

para-metersforperformingbothairborneandimpactsoundinsulationarecalculated.UsingtheNor140

formeasuringbuildingacoustic,bothairborneandimpactnoisehasneverbeeneasier.WiththeNor1028

NorBuildsoundinsulationreportingprogram,Norsonicoffersapowerfulanduser-friendlybuildingacoustic

solution.

Option 11 requires that minimum option 1, 3, 9 and 10 be installed.

Results Corrections

Option 9: Reverberation time measurement mode

Reverberationtimebasedonimpulseornoise(option10)excitation•

CalculatesbothT• 20andT30;backwardintegrateddecayforimpulse

Displaysthegraphicalreverberationdecayforeachfrequencyband•

Coversthe63–8000Hzfrequencybandsforthe1/1-octavefilters•

Coversthe50–10000Hzfrequencybandsforthe1/3-octavefilters•

Option 9 requires that minimum option 1 be installed.

Numerical RT tableReverberation decay

18

Option 13: STIPA (Speech Transmission Index) measurement mode

CalculatestheSTIPAspeechtransmissionindex•

FulfilstherequirementsoftheIEC60268-16StandardforSTIPA•

IncludessignalexcitationCD(Nor1034)forusethroughseparatepublicaddress•loudspeakersystemorportableCD-player

Backgroundnoisecorrection•

AddingSTIPAoptiontoNor140turnstheanalyserintoapowerfultoolforanalysingthe

SpeechTransmissionqualityinpublicareas.Themethodcanbeusedtocomparethe

speechtrans-missionqualityatvariouspositionsandundervariousconditionswithinthe

samelisteningspace.STIPAreplacestheformerusedRASTImethodasamoreaccurate

methodcomparedtoRASTI.

Ameasurementinonelisteningpositiontakesabout13sec.UnlikemanyotherSTIPAmeasurement

systems,theNor140canalsocorrecttheresultsforthebackgroundnoise.Inadditionallcalculatedindexes

aredisplayed,notonlythesingleSTIPAvalue.Thisfeatureisvaluableforengineersoptimisingtheroom

acousticsinpublicspacesorotherareaswherethespeechqualityisimportant.

Option 13 requires that minimum option 1 be installed!

STIPA results

Option 14: FFT measurement mode

8000lineFFTanalysiswith1.46Hzlineresolution•

• Coversthe1.46–9.6kHzfrequencyrange

• BothengineeringunitsanddB

• Pre-selectionof1-1028571averages

• Usefulwhensearchingonproblemswithrotatingmachinery

• FulfiltherequirementsforFFTanalysiswhensearchingfortonality

accordingtotheISO/DIS1996-2AnnexC(2005)standard

Displaycompressioninbinarysequence1–64• FFT spectrum with dB FFT spectrum with Engineering Units

Option 12 Swept-Sine measurements

UsedincombinationwiththeCtrlBuildremotecontrolfeatureoftheNorBuildsoftwaretype1028,theNor140

mayperformadvancedsoundinsulationmeasurementusingtheinnovativeSwept-Sinetechnique.

Buildingacousticsmeasurementsusingimpulseresponsemeasurementtechniqueasdescribedin•ISO18233

Enablesthemeasurementofsoundinsulationandreverberationtimeunderseverebackground•conditions

Performstestsofdividingwallswithextremesoundinsulationindices•

Measuresextremeshortreverberationtimes•

19

Option 18: Extended measurement range

Microphoneself-noisecompensationatthelower-levels•

CompensateallmeasuredfunctionoftheA-andC-/Z-weightingnetworks•

Adjustablemicrophoneself-noiselevelsforuseofothermicrophones•

Improvesthelowermeasurementrangebytypically7-10dB•

Shiftsthemeasurementrange10dBupwards(i.e.25-147dBA)•

PossibletodetectL• peaklevelsupto150dBwithoutchangingmicrophone

Option 17 Audiometer calibration

Calculatesfrequencyofthepuretone,Levelofthepuretone,L• Z,eqandHarmonicdistortionbasedonthe1/3octavefrequencyspectrum

Frequencyrange:20Hz–17766Hz•

Frequencyaccuracy:0.3%•

Frequencyresolution:0.1Hz•

Harmonicdistortionresolution:0,1%•

Option 17 requires that minimum option 3 is installed

Option 15: Survey Sound Power measurement mode

CalculatesthesurveygradeLWAsoundpowerlevelbasedonmultiplemeasurement•positionsonatheoreticalhemisphereaboveanoisesourceplacedonareflectivefloor

Automaticcorrectionofbackgroundnoiselevel•

FulfilstherequirementsoftheISO3746Standard•

ThisoptionallowstheusertoperformsurveygradeLWAsoundpowerlevelmeasurements

inthefieldwithoutanyotherexternaldevice.Aperfecttoolforverifyingthesoundpower

levelofequipmentafterinstallation.Agraphicalwizardguidestheuserthroughthe

measurement–easyandintuitivetouse!Sound Power results

Option 16: Measurement trigger

Triggerthestartofameasurementbasedontheinternalclock,levelthreshold•orexternalTTLsignalsuchashandswitchNor263A

LevelthresholdtriggerusedincombinationwithRepeatstoragemakesan•automaticeventmeasurementdevice

Theaudiorecordingistriggeredbasedontheclock,levelthresholdorexternal•TTLsignalsuchashandswitchNor263A

Themeasurementandaudiorecordingtriggercanbesetindependentlyofeachother.

Aspecialpre-triggerfeatureontheaudiorecordingcanbesetuptocaptureupto99

secondsoftheaudiosignalpriortothetriggerpoint.

Measurement Trigger

P.O.Box24,N-3421Lierskogen,NorwayTel:+4732858900Fax:+4732852208info@norsonic.comwww.norsonic.com

Distributor:

11.2008Copyright © Norsonic AS 2008 - All rights reserved

Overall Performance

The Nor140 fulfill the following standards set for sound level meters, 1/1-octaveand1/3octavefilters:

IEC61672-1:2002class1,IEC60651class1,IEC60804class1,IEC61260class 1, ANSI S1.4-1983 (R2001) with amendment S1.4A-1985 class 1, ANSIS1.43-1997(R2002)class1,ANSIS1.11-2004class1.

ANALOGUE INPUTSNumber of channels:1Input connector:7 pin LEMO connector for Norsonicmicrophonesystems.Microphone: Nor1225, 1/2”, free-field,50mV/PaPreamplifier: Nor1209 (Normal) orICP®-typebymenuselection.Preamplifier supply voltage: ±15volt,max3mAPolarisation voltage:0Vand200V,selectable.Maximum input signal: ±11VpeakPreamplifier ICP®:Supply current:4mASupply voltage:24VInput impedance: >100kΩ,<650pF

Measurement range: 0,3µV-7Vrms(10Vpeak) inonerangecorrespond-ingto-10dBto137dB(140dBpeak)with a microphone sensitivity of50mV/Pa.Option18shiftsthemeas-urement range to 147dB (150dBpeak) by reducing the microphonesensitivity.

Highpass filter Theinputsectionisequippedwithananalogue highpass filter to reducenoise from wind or other sourceswithfrequenciesbelowthefrequencyrangeformeasurements.Thefilterisswitched on if the limited frequencyrangeisselected(>6,3Hz).Filter type:3rdorderHPfilter(-3dBat3,4Hz,Butterworthresponse)

Analogue to digital conversionThe analogue input signal is con-verted to a digital signal by a multi-range sigma-delta converter withan effective sampling frequency of 48kHz. The anti-aliasing filter is acombination of an analogue and adigitalfilter.

Frequency weightingsSimultaneous measurement of A-andC-weightingorA- andZ-weight-ing. 1/1 octave band or 1/3 octavebandlevelsmaybemeasuredsimul-taneously if options providing theseweightingsareinstalled.1/1 octave filters: 0,5 - 16000Hz, class 1, digital IIR filters, base 10system(IEC61260)andANSIS1.11-2004Class1.

1/3 octave filters: 0,4 - 20000Hz, class 1, digital IIR filters, base 10system(IEC61260)andANSIS1.11-2004Class1.Level detectorDetector type: Digital true root-mean-square (RMS) detection, resolution 0.1dB which may option-ally be increased to 0.01dB for indicatedlevelsintherange–9.99to99.99dB.Crest factor capability: The crestfactorisonlylimitedbythepeak-valueofthesignal. Simultaneous measurement of the following functions: SPL,L

max;Lmin;Leq;LE;Lpeak;LN;LeqI;LEI;LTMax5.

Indication rangeThe calibration of the instrumentallows microphones with sensitivity in the range -84dB to +15.9dB relative to 1V/Pa to be applied. Thecorresponding display range for the indicated sound level is -50dB to+180dB.

Self-noise levelsThe self-noise ismeasuredwith thecalibration set to –26.0dB corre-spondingtoamicrophonesensitivityof 50mV/Pa. For voltage input, thelevel 0dB then corresponds to 1µV.Typical values for the self-noise are 5dBlowerthanthevaluesstated.

Noisemeasuredwith18pFmicrophonedummy and microphone preampli-fier Nor1209, averaged over 30s of measurementtime:A-weighted:13dBC-weighted:15dBZ-weighted:25dB1/3 oct: 6.3 Hz to 250 Hz:10dB1/3 oct: 315 Hz to 20 kHz:5dB

NoisemeasuredwithNor1225micro-phone and preamplifier Nor1209,averagedover30sofmeasurementtime:A-weighted:18dBC-weighted:22dBZ-weighted:30dB1/3 oct: 6.3 Hz to 250 Hz:15dB1/3 oct: 315 Hz to 20 kHz:10dB

Power supplyBatteries: 4 cells, IEC LR6, AA-sizedTypical battery life time: up to 14hours

External DC: 11 - 16V. Power consumption approximately 1.2Wdepending on selected modesof operation. The mains adapterNor340isrecommendedforusewiththeinstrument.Iftheexternalsupplyfallsbelow9V,theinstrumentwillusethe internal batteries if available. Iftheinstrumentswitcheditselfoffdueto lossofpower, itwillautomaticallyswitchonandresumenormalopera-tionafterreapplyingtheexternalDCsupply.

DisplayThedisplay isamonochrome, trans-reflectiveLCDgraphicaldisplaywith160×240 pixels (W×H) with auto-matic temperature compensation for contrastandviewingangle.Pressingthe lightkey illuminates thedisplay.The light switches off automaticallytwominutesafterthelastoperationofanykey.Thebargraphdisplaycovers80dBwhichmaybescrolledin10dBstepstocoverthetotalrange.

Signal generator outputMax output voltage:±10VOutput impedance:<100Ωohm.Theoutputisshort-circuitprooftoGNDandoutputcurrentisinexcessof3mA.Gain accuracy at 1 kHz:±0.2dBFrequency response re. 1 kHz: ±0.5dBfor20Hz<f<20kHz

AC-out: 3,5mm stereo jack. Bothchannels have identical signalsdriven by two separate amplifiers.Load impedanceshallbe16ohmormore. Output voltage is generatedby the 48kHz DAC based on datafromDSP. Full scale on the display bargraphcorrespondsto100mV.Output impedance: Less than 10ohm,AC-coupled100µF.Gain accuracy 1 kHz:±0,2dBFrequency response re. 1 kHz: ±0,5dBfor20Hz<f<20kHz.

USB interface:USBtype2.0

USB socket: B411Serial I/O port:RS232port,9600-115200baud.Digital inputs: 3pcDigital outputs:4pc

SD Memory CardTheinstrumentmayuseSDmemorycard forstoringofsetup information,sound recordingsandmeasurementresults.SDmemorycardincludedinthedelivery.

Data storageMeasureddataisstoredintheinternalmemoryof thesound levelmeterorontheSDmemorycard.Theinternalmemoryisofthe“flash”typeretaining theinformationwithoutbatterysupply.Approximately25Mbyte isavailableforthedatastorage.

Environmental condition for operationTemperature:–10°Cto+50°CHumidity:5%to90%RH,dewpointlessthan40°C.Atmospheric pressure: 85kPa to108kPa.

Environmental condition for storageTemperature:–30°Cto+60°CHumidity:5%to90%RH,dewpointlessthan40°C.Atmospheric pressure: 50kPa to108kPa.

Dimensions: Depth: 30mm,Width: 75mm,Weight incl. batteries:410g Length, excl.microphone/preamplifier: 210mmLength, incl. microphone/preamplifier: 292mm

Some of the feature listed in this leaflet may be optional in certain markets. Contact your local repre-sentativeorthefactoryfordetails.

Norsonicreservetherighttoamendany of the information given in thisleaflet inorder to takeadvantageofnewdevelopments.

Technical Specifications