zhengqueshiyongredianoubudankeyizhunquededaowendudeshuzhi，baozhengchanpinhege，erqiehaikejieshengredianoudecailiaoxiaohao
，jijieshengzijinyounengbaozhengchanpinzhiliang。anzhuangbuzhengque，redaolvheshijianzhihoudengwucha，tamenshiredianouzaishiyongzhongdezhuyaowucha。

 

1、安裝不當引入的誤差

 

ruredianouanzhuangdeweizhijicharushendubunengfanyinglutangdezhenshiwendudeng，huanjuhuashuo
，redianoubuyingzhuangzaitaikaojinmenhejiarededifang，charudeshenduzhishaoyingweibaohuguanzhijingde8～10倍；熱電偶的保護套管與(yu)壁(bi)間(jian)的(de)間(jian)隔(ge)未(wei)填(tian)絕(jue)熱(re)物(wu)質(zhi)致(zhi)使(shi)爐(lu)內(nei)熱(re)溢(yi)出(chu)或(huo)冷(leng)空(kong)氣(qi)侵(qin)入(ru)，因(yin)此(ci)熱(re)電(dian)偶(ou)保(bao)護(hu)管(guan)和(he)爐(lu)壁(bi)孔(kong)之(zhi)間(jian)的(de)空(kong)隙(xi)應(ying)用(yong)耐(nai)火(huo)泥(ni)或(huo)石(shi)棉(mian)繩(sheng)等(deng)絕(jue)熱(re)物(wu)質(zhi)堵(du)塞(sai)以(yi)免(mian)冷(leng)熱(re)空(kong)氣(qi)對(dui)流(liu)而(er)影(ying)響(xiang)測(ce)溫(wen)的(de)準(zhun)確(que)性(xing)
；熱電偶冷端太靠近爐體使溫度超過100℃；熱電偶的安裝應盡可能避開強磁場和強電場，所以不應把熱電偶和動力電纜線裝在同一根導管內以免引入幹擾造成誤差
；熱re電dian偶ou不bu能neng安an裝zhuang在zai被bei測ce介jie質zhi很hen少shao流liu動dong的de區qu域yu內nei，當dang用yong熱re電dian偶ou測ce量liang管guan內nei氣qi體ti溫wen度du時shi

，必bi須xu使shi熱re電dian偶ou逆ni著zhe流liu速su方fang向xiang安an裝zhuang，而er且qie充chong分fen與yu氣qi體ti接jie觸chu。
 

 

2、絕緣變差而引入的誤差

 

如ru熱re電dian偶ou絕jue緣yuan了le，保bao護hu管guan和he拉la線xian板ban汙wu垢gou或huo鹽yan渣zha過guo多duo致zhi使shi熱re電dian偶ou極ji間jian與yu爐lu壁bi間jian絕jue緣yuan不bu良liang，在zai高gao溫wen下xia更geng為wei嚴yan重zhong，這zhe不bu僅jin會hui引yin起qi熱re電dian勢shi的de損sun耗hao而er且qie還hai會hui引yin入ru幹gan擾rao，由you此ci引yin起qi的de誤wu差cha有you時shi可ke達da上shang百bai度du。

 

3
、熱惰性引入的誤差

 

由於熱電偶的熱惰性使電氣的指示值落後於被測溫度的變化，在進行快速測量時這種影響尤為突出。所以應盡可能采用熱電極較細
、baohuguanzhijingjiaoxiaoderedianou。cewenhuanjingxukeshi


，shenzhikejiangbaohuguanququ。youyucunzaiceliangzhihou
，yongredianoujiancechudewendubodongdezhenfujiaoluwenbodongdezhenfuxiao。celiangzhihouyueda
，redianoubodongdezhenfujiuyuexiao，yushijiluwendechabieyejiuyueda。dangyongshijianchangshudaderedianoucewenhuokongwenshi
，dianqixianshidewendusuiranbodonghenxiao
，danshijiluwendebodongkenenghenda。weilezhunquedeceliangwendu，yingdangxuanzeshijianchangshuxiaoderedianou。shijianchangshuyuchuanrexishuchengfanbi，yuredianoureduandezhijing、材cai料liao的de密mi度du及ji比bi熱re成cheng正zheng比bi，如ru要yao減jian小xiao時shi間jian常chang數shu，除chu增zeng加jia傳chuan熱re係xi數shu以yi外wai，最zui有you效xiao的de辦ban法fa是shi盡jin量liang減jian小xiao熱re端duan的de尺chi寸cun。使shi用yong中zhong，通tong常chang采cai用yong導dao熱re性xing能neng好hao的de材cai料liao，管guan壁bi薄bo
、內徑小的保護套管。在較精密的溫度測量中
，使用無保護套管的裸絲熱電偶，但熱電偶容易損壞，應及時校正及更換。

 

4
、熱阻誤差

 

gaowenshi，rubaohuguanshangyouyicengmeihui，chenaifuzaishangmian，zerezuzengjia，zuairedechuandao
，zheshiwendushizhibibeicewendudezhenzhidi。yinci，yingbaochiredianoubaohuguanwaibudeqingjie，yijianxiaowucha。