温度传感器的接线方法

PtlOO,就是说它的阻值在0度时为100欧姆，PT1OO温度 传感器是一种以铂(Pt)作成的电阻式温度传感器，属于正电阻系 数, 其电阻和温度变化的关系式如下：R=Ro(l+aT)Pt100温度传感器的主要技术参数如下：测量范围：-200°C+850°C；允许偏差值r： A级土(0.15+ 0. 002|t|), B 级土(0.30 + 0. 005|t|)；热响应 时间30s ；最小置入深度：热电阻的最小置入深度N200mm ；允 通电流W5mA。另外，Pt100温度传感器还具有抗振动、稳定 性好、准确度高、耐高压等优点。PT100温度传感器三根芯线的接法PT100铂电阻传感器有三条引线，可用A、B、C(或黑、红、黄)来代表三根线, 三根线之间有如下规律：A与B或C之间的阻值常温下在110欧左右，B与C之间为0欧,B与C在内部是直通的,原则上B与C没 什么区别.仪表上接传感器的固定端子有三个：A线接在仪表上接传感器的一个固定的端子.B和C接 在仪表上的另外两个固定端子，B和C线的位置可以互换，但都得接上，。如果中间接有加长线,三条导线的规格和长度要相 同。热电阻的3线和 4线接法：是采用2线、3线、4线，主要 由使（选）用的二次仪表来决定。一般显示仪表提供三线接法， PT100 一端出一颗线，另一 端出两颗线，都接仪表，仪表内部通过桥抵消导线电阻。 一般PLC为四线，每端出两颗线，两颗接PLC输出恒流源,PLC通过另两颗测量PT100上的电压，也是为了抵消导线测温范 围:-200-400°C探头长度:探头直0 5m径:m电阻变化 :安装方 式:活动螺丝固定螺丝规格 :5cm/10cm/15cm/20cm0.3851Q/CM8*1.0一般2米可订 引线长 制长 度:度（专用引线）引线接法 :三线式接线方 接线 式:叉套管材质 :不锈钢传感器 件:PT （铂）电阻，四线精确度最高，三线也可以，两线最低，具体用法要考虑精度要求和成本PT100 温度传感器产品特征1、不锈钢套管封装，经久耐用2、活动螺丝固定，使用方便3、按照国际 IEC751 国际标准制造，即 插即用4、多种探头尺寸可选、适应面广5、高精度、高稳定、高灵敏6、外形小巧，经济实用 产品货期：现货供应，特大批量请提前 通知。特性指标PT100 温度传感器采用三线式接法的原因：PT100温度传感器O°C时电阻值为100Q，电阻变化率为0.3851Q /°C。由于 其电阻值小，灵敏度高，所以引线的阻值不能忽略不计，采用三线式接法可 消除引线线路电阻带来的测量误差，原理如下：PT100引出的三根导线截面积和长度均相同(即rl=r2=r3)，测量铂电阻的电 路一般是不平衡电桥，铂电阻(Rp tlOO)作为电桥的一个桥臂电阻，将导线一 根(r 1)接到电桥的电源端，其余两根(r2、r3)分别接到铂电阻所在的桥臂及 与其相邻的桥臂上，这样两桥臂都引入了相同阻值的引线电阻，电桥处于平 衡状态，引线线电阻的变化对测量结果没有任何影响。接线图：ptioo - rsn探头长度05:5cm10:1 Ocm15:1 5cm20:20cm此温度传感器为通用型产品，即插即用，用户在选型时只需要讲明探头的长度。PT1OO原理及分度表RTD,Resistance Temperature Detector)-一种物质材料作成的电阻，它会随温度的上升而改变电阻值，如果它随温 升就称为正电阻係数,如果它随温度的上升而电阻值反而下降就称为负电阻系数。大部分电阻式温度传感器是以金 的电阻式温度检测器,最为稳定耐酸碱、不会变质、相当线性.,最受工业界采用。吉一种以铂(Pt)作成的电阻式温度传感器，属于正电阻系数,其电阻和温度变化的关系式如下：R=Ro(1+a T)o为100Q (在0°C的电阻值),T为摄氏温度，因此白金作成的电阻式温度传感器，又称为PT100PT1 00温度传感器分度表温度0123456183£电阴值（純）-20018.52-19022.8322.4021.9721.5421. 1120.6820.2519. 8219.3818. 95-18027.1026.6726. 2425.8225. 3324.9724.5424. 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. 0537.6437.2238.8038. 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. &0-9064.3063.9063.49&3.0962.6862.2861.8861.4761.0760. &6-8068.3367.9267.52&7.1266. 7266.3165.9165.5165. 1164. 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