IEC-61012-1990.pdf
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1、NORME INTERNATIONALE INTERNATIONAL STANDARD CE1 IEC 61012 Premire dition First edition 1990-01 Filtres pour la mesure des sons audibles en prsence dultrasons Filters for the measurement of audible sound in the presence of ultrasound Numro de rfrence Reference number CEMEC 61012: 1990 Copyright Inter
2、national Electrotechnical Commission Provided by IHS under license with IECLicensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 03/06/2007 06:04:26 MSTNo reproduction or networking permitted without license from IHS -,-,- Numros des publications Depuis le 1 er janvier 1997, les p
3、ublications de la CE1 sont numrotes partir de 60000. Publications consolides Les versions consolides de certaines publications de la CE1 incorporant les amendements sont disponibles. Par exemple, les numros ddition 1.0, 1.1 et 1.2 indiquent respectivement la publication de base, la publication de ba
4、se incorporant lamendement 1, et la publication de base incorporant les amendements 1 et 2. Validit de la presente publication Le contenu technique des publications de la CE1 est constamment revu par la CE1 afin quil reflete ltat actuel de la technique. Des renseignements relatifs la date de reconfi
5、r- mation de la publication sont disponibles dans le Catalogue de la CEI. Les renseignements relatifs des questions ltude et des travaux en cours entrepris par le comit technique qui a tabli cette publication, ainsi que la liste des publications tablies, se trouvent dans les documents ci- dessous: (
6、Site web de la CEI* Catalogue des publications de la CE1 Publi annuellement et mis jour rgulirement (Catalogue en ligne) Bulletin de la CE1 Disponible la fois au elle doit contenir au moins les renseignements ci-dessous: a) La caractristique nominale de rponse en frquence spcifie dans le tableau 1.
7、b) Leffet des champs magntiques, suivant les essais effectus conformment 3.1 . c ) Les effets de la temprature, conformment 3.2. d ) Les effets de lhumidit, conformment 3.3. Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=IHS Employees/1111111001, U
8、ser=listmgr, listmgr Not for Resale, 03/06/2007 06:04:26 MSTNo reproduction or networking permitted without license from IHS -,-,- 1012 0 IEC - 9 - 3.3 The manufacturer shall state the range of relative humidity over which the filter is intended to operate continuously. The sensitivity shall not cha
9、nge by more than ?0,5 dB referred t o the indication a t 65% when the relative humidity varies from 30% to 90%. The test shall be conducted at a temperature of 40 OC at a frequency of 1 O00 Hz. 3.4 If the filter is built into or externally connected t o a sound level meter the overall effects of mag
10、netic and electrostatic fields, tempe- rature, and humidity shall not exceed the limits specified in the relevant clauses (Type 1 instruments) of IEC 651. 4. Rating information and instruction manual 4.1 A filter which is constructed as a separate accessory and which complies with this standard shal
11、l be marked to show the number of this standard, the name of the manufacturer, the model number and the serial number. Where the filter is built into a sound level meter and combined with the A-weighting characteristic, the switch position shall be marked “AU“. 4.2 Where the filter is constructed as
12、 a separate accessory, the following information shall either be marked on the filter o r be included in an instruction manual: 4.2.1 The model of sound level nieters for which the filter meets the requirements, especially those of 2.3 and 3.4. 4.2.2 The nominal input and output impedances of the fi
13、lter. 4.2.3 The nominal source and load impedances between which the filter is designed to operate. 4.2.4 The insertion loss, in decibels, a t 1 O00 Hz when the filter is connected between the source and load impedances specified in 4.2.3. 4.2.5 The maximum input voltage to the filter 4.3 An instruc
14、tion manual shall be supplied with the filter; it shall include at least the information listed below: a) The nominal frequency response characteristic specified in table 1. 6) The effect of magnetic fields as tested in accordance with 3.1. c) d ) The effects of temperature in accordance with 3.2. T
15、he effects of humidity in accordance with 3.3. Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 03/06/2007 06:04:26 MSTNo reproduction or networking permitted without license from IHS -,
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- IEC 61012 1990
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