1、NORME?CEIINTERNATIONALE?IECINTERNATIONAL?642STANDARD?1979AMENDEMENT 1AMENDMENT 11992-09Amendement 1Rsonateurs et dispositifs en cramiquepizolectrique pour la commande etle choix de la frquenceChapitre I:Valeurs et conditions normalisesChapitre II:Conditions de mesure et dessaisAmendment 1Piezoelectr
2、ic ceramic resonators andresonator units for frequency controland selectionChapter I:Standard values and conditionsChapter II:Measuring and test conditions CEI 1992 Droits de reproduction rservs Copyright all rights reservedBureau central de la Commission Electrotechnique Internationale 3,rue de Var
3、emb Genve SuisseIECCommission Electrotechnique Internationale CODE PRIX?CInternational Electrotechnical Commission PRICE CODEMe,ipvHapoiman 3neKTpoTeXHH4eCHap HoMHCCHR?Pour prix,voir catalogue en vigueurFor price,see current catalogueLICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THI
4、S LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.DIS49(BC)220Rapport de vote49(BC)235-2-?642 amend.1 CEIAVANT-PROPOSLe prsent amendement a t tabli par le comit dtudes n 49 de la CEI:Dispositifspizolectriques et dilectriques pour la commande et le choix de la frquence.Le texte de cet amendement est iss
5、u des documents suivants:Le rapport de vote indiqu dans le tableau ci-dessus donne toute information sur le voteayant abouti lapprobation de cet amendement.Page 48Annexe BMthodes normalises de mesure des rsonateursen cramique pizolectrique et dispositifs encramique pizolectriqueRemplacer A ltude par
6、 le texte suivant:B1 Principe de la mesureCe principe est bas sur le mme principe que celui qui est dcrit dans la CEI 302 et laCEI 444.B2 Circuit de mesureIl se compose essentiellement dun circuit en Ir reli par le montage dessai deux portesaux appareils associs.La gamme de frquence doit tre de 10 k
7、Hz 30 MHz.B3 Spcifications mcaniquesLe montage dessai typique pour les rsonateurs en cramique pizolectrique se com-pose des lments suivants(voir figure B.1):a)deux plaques isolantes;b)deux cales dpaisseur mtalliques;c)deux plaques mtalliques argentes;d)contact argent fix;e)contact argent variable;f)
8、ressort en bar argent.LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.DIS49(CO)220Report on Voting49(CO)235642 Amend.1 IEC?-3-FOREWORDThis amendment has been prepared by IEC technical committee No.49:Piezoelectric anddielectric devices
9、 for frequency control and selection.The text of this amendment is based on the following documents:Full information on the voting for the approval of this amendment can be found in thevoting report indicated in the above table.Page 49Annex BStandard methods of measurement for piezoelectricceramic r
10、esonators and resonator unitsReplace Under consideration by the following text:B1 Principle of measurementThis principle is based on the same principle as that written in IEC 302 and IEC 444.B2 Measuring circuitThis consists basically of a n-network connected with a two-terminal test fixture to thea
11、ssociated equipment.The frequency range shall be 10 kHz to 30 MHz.B3 Mechanical specificationA typical test fixture for piezoelectric ceramic resonators consists of the following parts(see figure B.1):a)two insulating plates;b)two metal spacers;c)two silver-plated metal plates;d)silver-plated fixed
12、contact;e)silver-plated variable contact;f)silver-plated bar spring.LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.CEI 93919220-4-?642 amend.1 CEI20Dimensions en millimtresFigure B.1-Montage dessai des rsonateursB4 Rsistances de rfren
13、ceLes rsistances utilises pour ltalonnage ont la forme indique ci-dessous(voir figureB.2).Les valeurs de rsistances pour ltalonnage initial sont 50 S2 et 100 a.120IElectrode en argentSubstrat en Al2030,5?,.,-,-:-Rsistance mtallique normalise CE!940192 Dimensions en millimtresFigure B.2-Rsistances po
14、ur ltalonnageLICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU./EC 939/9220120642 Amend.1 IEC26-5-16LAJT101020 42.514?I?1470,5Dimensions in millimetresFigure B.1-Test fixture for resonatorsB4 Reference resistorsThe resistors for the cali
15、bration are of the shape shown below(see figure B.2).Resistancevalues for initial calibration are 50 D.and 100 O.rSilver electrodeAI2O3 substrateStandard metal resistor0,5?/EC 940/92Dimensions in millimetresFigure B.2-Resistors for calibrationLICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.ICS 31.140Typeset and printed by the IEC Central OfficeGENEVA,SWITZERLANDLICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.
