IEC_60751_Industrial_platinum_resistance_thermometer_Sensors_1.pdf

NORME I NTE RN AT1 ON ALE INTERNATIONAL STANDARD Amendement 2 CE1 IEC 751 1983 AMENDEMENT 2 AMENDMENT 2 1995-07 4844891 0592222 657 Capteurs industriels rsistance thermomtrique de platine Amendment 2 Indu st r i al p I a t i nu m res i st an ce therm om e ter sensors CE1 1995 Bureau Cen!ral de b Commission Eledrolechnique Inlematbnale 3,nie de Varemb Genve,Cuke Droits de reprodudion rservs-Copyright-ali tights reserved Commission Electrotechnique Internationale international Electrotechnical Commission PRICE CODE D Memnynapoanan 3newrrxiex.tecnan HOMWCCHR COD E PRIX Pwrpnr,vair catalogue en vigueur Forprize,u w current catalogue Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=Technip Abu Dabhi/5931917101 Not for Resale,02/12/2006 06:56:03 MSTNo reproduction or networking permitted without license from IHS-,-,-484484L 0542223 543=DIS 65B1224lDIS-2-751 amend.2 0 CE1:1 995 Rapport de vote 65BlXXlRVD AVANT-PROPOS Le prsent amendement a t tabli par le sous-comit 658:Dispositifs,du comit dtudes 65 de la CEI:Mesure et commande dans les processus industriels.Le texte de cet amendement est issu des documents suivants:Le rapport de vote indiqu dans le tableau ci-dessus donne toute information sur le vote ayant abouti lapprobation de cet amendement.Page 8 3.1 Relationstemprature/rsistance Remplacer le texte existant de ce paragraphe par ce qui suit:Les relations temprature/rsistance utilises dans cette norme sont les suivantes:-pour le domaine-200 O C O OC:-pour le domaine de O O C 850 OC:R,=Rol+At+B?+C(t-lOOOC)?R,=Ro(1+At+B?)Pour la qualit du platine communment utilis pour les thermomtres industriels rsis-tance,la valeur des coefficients de ces quations sont:A=3,9083 x O C B=-5,775 x lo-o c 2 C=-4,183 x lo-*Pour les thermomtres a rsistance satisfaisant aux relations ci-dessus,le coefficient de temprature a,dfini comme suit:a=(R1oo-est 0,003 85 O C-100 x Ro o%o0 R O est la rsistance 100 OC;est la rsistance O C.(Pour les besoins des calculs la valeur exacte est 0,003 850 55 OC-.)Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=Technip Abu Dabhi/5931917101 Not for Resale,02/12/2006 06:56:03 MSTNo reproduction or networking permitted without license from IHS-,-,-H 4844891 0592224 42T m 751 Amend.2 0 IEC:1995-3-FOREWORD This amendment has been prepared by sub-committee 656:Devices,of IEC technical committee 65:Industrial-process measurement and control.The text of this amendment is based on the following documents:65B1224/DlS 65B/XX/RVD Full information on the voting for the approval of this amendment can be found in the report on voting indicated in the above table.Page 9 3.1 Temperature/resistance relationships Replace the existing text of this subclause by the following:The temperature/resistance relationships used in this standard are as follows:-for the range-200 O C to O O C:-for the range of O O C to 850 OC:Rt=Rol+At+B?+C(t-lOOOC)?Rt=Ro(1+A t+B?)For the quality of platinum commonly used for industrial resistance thermometers,the values of the constants in these equations are:A=3,9083 x OC-7 0c-2 B=-5,775 x 10 C=-4,183 x For resistance thermometers satisfying the above relationships,the temperature coeffi-cient a,defined as:a=(R1oo-)has the value 0,003 85 O C-100 x R,where is the resistance at 100 OC;is the resistance at O OC.Rl O0 Ro(For calculation purposes,use the exact value of 0,003 850 55 OC-.)Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=Technip Abu Dabhi/5931917101 Not for Resale,02/12/2006 06:56:03 MSTNo reproduction or networking permitted without license from IHS-,-,-W 4844893 0592225 366 M-4-751 amend.2 0 CEI:1995 Ces quations ont t retenues pour tablir les fableaux de correspondance tempra-ture/rtasistance de la prsente norme et ne doivent pas tre utilises pour ltalonnage des thermomtres individuels.Les valeurs de temprature de la prsente norme sont celles de IEchelle internationale de temprature de 1990(EIT-90).t NOTE-Sauf spcification contraire de la part du constructeur,les valeurs de rsistance dfinies ci-dessus ne comprennent pas les rsistances des conducteurs de prolongement entre la rsistance thermomtrique et les sorties externes.Pages 12 et 13 Supprimer le tableau 1 existant et le remplacer par ce qui suit:Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=Technip Abu Dabhi/5931917101 Not for Resale,02/12/2006 06:56:03 MSTNo reproduction or networking permitted without license from IHS-,-,-751 Amend.2 0 IEC:1995-5-These equations are listed as the basis for the temperature/resistance tables of this standard and are not intended to be used for the calibration of individual thermometers.Values of temperature in this standard are on the International Temperature Scale of 1990(ITS-90).NOTE-Unless specified by the manufacturer,the resistance values defined by the above equations do not include resistanc