PT铂电阻中文资料.docx

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1、PT100温度变送器的正温度系数补偿表1.传感器特性FeatureThermocoup1eRTDResponsetimeBetterMaximumIemperatureHigherRuggednessBetterBetterBetterBetterCostefficiencyBetterAccuracy1ong-termstabi1ityStandardizationRTD具有较高的精度，工作温度范围：-200。C至+85（C它们还具有较好的长期稳定性，利用适当的数据处理设备就可以传输、显示并记录其温度输出。因为热敏电阻的阻值和温度呈正比关系，设计人员只需将已知电流流过该电阻就可以得到与温度成

2、正比的输出电压。根据已知的电阻-温度关系，就可以计算出被测温度值。电阻值随温度的变化称为“电阻的温度系数”，绝大多数金属材料的温度系数都是正数，而且许多纯金属材料的温度系数在一定温度范围内保持恒定。所以，热敏电阻是一种稳定的高精度、并具有线性响应的温度检测器。具体应用中选用哪一种金属材料（钳、铜、银等）取决于被测温度范围。钳电阻在0。C的标称电阻值是IOOQ,尽管RTD是一种标准化器件，但在世界各地有多种不同的标准。这样，当同一标准的RTD用在不同标准的仪表设计中时将会产生问题。表2.伯电阻RTD的公共标准*OrganizationStandardA1PHA(?):AverageTempera

3、tureCoefficientofResistance(/)Nomina1Resistanceat0()BritishStandardBS1904:19840.003850100DeutschenInstitutfurDIN43760:0.003850100Normung1980Internationa1E1ectrotechnica1CommissionIEC751:1995(Amend.2)0.00385055100ScientificApparatusManufacturersofAmericaSAMARC-4-19660.00392398.129JapaneseStandardJISC

4、1604-19810.003916100AmericanSocietyforTestingandMateria1sASTME11370.00385055100*SensingDeViCeS,Inc.生产满足上述标准的钳电阻RTDC钳金属的长期稳定性、可重复操作性、快速响应及较宽的工作温度范围等特性使其能够适合多种应用。因此，祐电阻RTD是温度测量中最稳定的标准器件。以下公式描述了PTIOo的特性，显然它的温度与电阻呈非线性关系：RT=R0（1+AT+BT2+C（T-100）T3）其中：A=3.9083E-3B=-5.775E-7C=-4.183E-12（低于0时）或0（高于0时）。表3是表格形

5、式。表3.电阻/温度表*,385祐电阻，0。C时为IoO.0Q0123456789温度电阻值（Q）-20018.52-19022.8322.4021.9721.5421.1120.6820.2519.8219.3818.95-18027.1026.6726.2425.8225.3924.9724.5424.1123.6823.25-17031.3430.9130.4930.0729.6429.2228.8028.3727.9527.52-16035.5435.1234.7034.2833.8633.4433.0232.6032.1831.76-15039.7239.3138.8938.4738

6、.0537.6437.2236.8036.3835.96-14043.8843.4643.0542.6342.2241.8041.3940.9740.5640.14-13048.0047.5947.1846.7746.3645.9445.5345.1244.7044.29-12052.1151.7051.2950.8850.4750.0649.6549.2448.8348.42-11056.1955.7955.3854.9754.5654.1553.7553.3452.9352.52-10060.2659.8559.4459.0458.6358.2357.8257.4157.0156.60-9

7、064.3063.9063.4963.0962.6862.2861.8861.4761.0760.66-8068.3367.9267.5267.1266.7266.3165.9165.5165.1164.70-7072.3371.9371.5371.1370.7370.3369.9369.5369.1368.73-6076.3375.9375.5375.1374.7374.3373.9373.5373.1372.73-5080.3179.9179.5179.1178.7278.3277.9277.5277.1276.73-4084.2783.8783.4883.0882.6982.2981.8

8、981.5081.1080.70-3088.2287.8387.4387.0486.6486.2585.8585.4685.0684.67-2092.1691.7791.3790.9890.5990.1989.8089.4089.0188.62-1096.0995.6995.3094.9194.5294.1293.7393.3492.9592.550100.0099.6199.2298.8398.4498.0497.6597.2696.8796.480100.00100.39100.78101.17101.56101.95102.34102.73103.12103.5110103.90104.

9、29104.68105.07105.46105.85106.24106.63107.02107.4020107.79108.18108.57108.96109.35109.73110.12110.51110.90111.2930111.67112.06112.45112.83113.22113.61114.00114.38114.77115.1540115.54115.93116.31116.70117.08117.47117.86118.24118.63119.0150119.40119.78120.17120.55120.94121.32121.71122.09122.47122.8660

10、708090123.24127.08130.90134.71123.63127.46131.28135.09124.01127.84131.66135.47124.39128.22132.04135.85124.78128.61132.42136.23125.16128.99132.80136.61125.54129.37133.18136.99125.93129.75133.57137.37126.31130.13133.95137.75126.69130.52134.33138.13100HO120130140138.51142.29146.07149.83153.58138.88142.

11、67146.44150.21153.96139.26143.05146.82150.58154.33139.64143.43147.20150.96154.71140.02143.80147.57151.33155.08140.40144.18147.95151.71155.46140.78144.56148.33152.08155.83141.16144.94148.70152.46156.20141.54145.31149.08152.83156.58141.91145.69149.46153.21156.95150160170180190157.33161.05164.77168.481

12、72.17157.70161.43165.14168.85172.54158.07161.80165.51169.22172.91158.45162.17165.89169.59173.28158.82162.54166.26169.96173.65159.19162.91166.63170.33174.02159.56163.29167.OO170.70174.38159.94163.66167.37171.07174.75160.31164.03167.74171.43175.12160.68164.40168.11171.80175.49200210220230240175.86179.53183.19186.84190.47176.22179.89183.55187.20190.84176.59180.26183.92187.56191.20176.96180.63184.28187.93191.56177.33180.99184.65188.29191.92177.69181.36185.01188.66192.29178.06181.72185.38189.02192.65178.43182.09185.741