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AN Measuring vibration - Norl40

AN Measuring vibration - Norl40
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Application Noie Measuring vibration using sound level meter Nor140 This technical note describes the use of the sound level meter Nor140 for measurement of acclration levels. The normal microphone is then substituted by an accelerometer. The note also describes calibration and the relation between the level in d驩cibel and the acclration in linear units. WNorsonic

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tH Norsonic Introduction Most sound level meters and sound analysers can be used for vibration measuremenls, even If they do not provide absolute (linear) unils in the display, To simplity the description, ths application note describes the use of the handheld sound level meter Norsonic Nor140. However, the described principes also appty to other types of sound level meters. Ailhough several transducer princ魮ples are commercial availabie. this application note will deai with tho accoioromcter only, simply because it is the transducer type most commonly encountered when measuring vibration...

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M Virant» Fd?0<tv EngWl 03 OR hNNorson/c Norl40 Mor1209 Preamp. Nor1447/2 Nor1466 I Microdot. cable [Normally supplied wth accelrometer) Accoioro motor Set-up for using a charge-sensitipe type ofacxelerometer connected to NorldO* The chargeproduced by the acveterometergn멩rtes a voilageproportionat to the inverse ofthe capacitance loadtng the charge generator The capaeitante the sum ofthe capacitartce for the accelerometer and ail table* connectedto the transducer. The microphone prearnplifterw normally Norl209* has very high tnput imp⹩dance - typualfy 10gtgaohm andan tnputcapacitancebelow l...

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AN Vibration Ed2Rev0 English 03.08 P.O.Box 24, N-3421 Lierskogen, Norway Tel.: +47 3285 8900 Fax.: +47 3285 2208 info@norsonic.com www.norsonic.com Distributor: ICP-type If you use an ICP-type of accelerometer with a known sensitivity, it is easy to calculate the required sensitivity setting for the instrument. Just enter the sensitivity for the accelerometer in volt per unit as a level-sensitivity in dB. Example: Assume the sensitivity for the accelerometer is 2,5 mV/ms-2. The level-sensitivity is therefore: By entering this value as sensitivity in the calibration menu, the instrument is...

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AN Measuring vibration - Norl40 4Pages

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AN Measuring vibration - Norl40
4Pages