普通型(xing)熱(re)電(dian)偶(ou)(ou)和鎧裝熱(re)電(dian)偶(ou)(ou)都是市面上常見(jian)的(de)測量(liang)儀(yi)器我們如(ru)果是使用普通型(xing)熱(re)電(dian)偶(ou)(ou)，首先就要對(dui)它有一定(ding)的(de)了解(jie)。

      普通型(xing)熱電(dian)(dian)偶一(yi)(yi)般由熱電(dian)(dian)極(ji),絕緣管(guan)(guan)(guan),保(bao)護套管(guan)(guan)(guan)和(he)接(jie)線(xian)盒等部分組(zu)成,而鎧裝型(xing)熱電(dian)(dian)偶則是將電(dian)(dian)熱偶絲,絕緣材(cai)料和(he)金(jin)屬(shu)保(bao)護套管(guan)(guan)(guan)三者組(zu)合裝配(pei)后,經過(guo)拉伸加(jia)工而成的(de)一(yi)(yi)種堅實的(de)組(zu)合體。但(dan)是熱電(dian)(dian)偶的(de)電(dian)(dian)信號(hao)卻需(xu)要一(yi)(yi)種特殊的(de)導(dao)(dao)線(xian)來進行(xing)傳遞(di),這種導(dao)(dao)線(xian)我們稱為補償導(dao)(dao)線(xian)。不同(tong)的(de)熱電(dian)(dian)偶需(xu)要不同(tong)的(de)補償導(dao)(dao)線(xian),其(qi)主(zhu)要作(zuo)用就是與(yu)電(dian)(dian)熱偶連接(jie),使電(dian)(dian)熱偶的(de)參比(bi)端遠離(li)電(dian)(dian)源,從(cong)而使參比(bi)端溫(wen)度穩定。

     補(bu)償(chang)導(dao)線(xian)(xian)又分(fen)為(wei)補(bu)償(chang)型(xing)和(he)延長(chang)(chang)型(xing)兩種,延長(chang)(chang)導(dao)線(xian)(xian)的(de)化學成分(fen)與被補(bu)償(chang)的(de)熱電(dian)(dian)偶(ou)相(xiang)同(tong),但是(shi)實(shi)際中,延長(chang)(chang)型(xing)的(de)導(dao)線(xian)(xian)也并不(bu)是(shi)用(yong)和(he)電(dian)(dian)熱偶(ou)相(xiang)同(tong)材質的(de)金(jin)屬,一(yi)般采用(yong)和(he)熱電(dian)(dian)偶(ou)具有相(xiang)同(tong)電(dian)(dian)子密度的(de)導(dao)線(xian)(xian)代替。補(bu)償(chang)導(dao)線(xian)(xian)的(de)與熱電(dian)(dian)偶(ou)的(de)連(lian)線(xian)(xian)一(yi)般都是(shi)很(hen)明了, 熱電(dian)(dian)偶(ou)的(de)正極連(lian)接(jie)補(bu)償(chang)導(dao)線(xian)(xian)的(de)紅(hong)色(se)線(xian)(xian),而負極則連(lian)接(jie)剩下(xia)的(de)顏(yan)色(se)。一(yi)般的(de)補(bu)償(chang)導(dao)線(xian)(xian)的(de)材質大(da)部分(fen)都采用(yong)銅鎳合金(jin)。

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