雙偶頭k分度號鎧裝熱電偶WRNK2-131具有(you)能彎曲(qu)、耐(nai)高壓、熱響應時(shi)間快(kuai)和堅固耐(nai)用等許多優(you)點，它(ta)和工業用裝(zhuang)(zhuang)配式熱電(dian)(dian)偶(ou)(ou)一樣，作(zuo)為測量溫(wen)度(du)的傳感(gan)器，通常和顯示(shi)儀(yi)表(biao)、記錄(lu)儀(yi)表(biao)和電(dian)(dian)子調節器配套使用，同時(shi)，亦可以(yi)作(zuo)為裝(zhuang)(zhuang)配式熱電(dian)(dian)偶(ou)(ou)的感(gan)溫(wen)元件(jian)。它(ta)可以(yi)直(zhi)接測量各(ge)種(zhong)生產過程(cheng)中從(cong)0℃~800℃范圍內的液體(ti)(ti)(ti)、蒸汽和其(qi)氣體(ti)(ti)(ti)介質以(yi)及固體(ti)(ti)(ti)表(biao)面的溫(wen)度(du)。與(yu)裝(zhuang)(zhuang)配式熱電(dian)(dian)偶(ou)(ou)相比，鎧裝(zhuang)(zhuang)熱電(dian)(dian)偶(ou)(ou)具有(you)可彎曲(qu)、耐(nai)高

雙偶頭k分度號鎧裝熱電偶WRNK2-131

壓、熱響應時間短和(he)堅固(gu)耐用等優點。

編輯本段工作原理

鎧裝熱電偶131

是(shi)(shi)兩種(zhong)不同成份的導體(ti)(ti)兩端經焊接，形成回路，直接測(ce)溫(wen)(wen)(wen)端叫(jiao)工作端，接線(xian)端子(zi)(zi)端叫(jiao)冷端，也稱參比(bi)端。當工作端和(he)參比(bi)端存在溫(wen)(wen)(wen)差(cha)時，就會(hui)在回路中(zhong)產(chan)生熱(re)電(dian)(dian)(dian)(dian)(dian)流，接上(shang)顯(xian)示儀表(biao)，儀表(biao)上(shang)就會(hui)指(zhi)示出熱(re)電(dian)(dian)(dian)(dian)(dian)偶所產(chan)生的熱(re)電(dian)(dian)(dian)(dian)(dian)動勢的對(dui)應溫(wen)(wen)(wen)度(du)(du)值。鎧裝(zhuang)熱(re)電(dian)(dian)(dian)(dian)(dian)偶的熱(re)電(dian)(dian)(dian)(dian)(dian)動勢將隨著測(ce)量端溫(wen)(wen)(wen)度(du)(du)升高而(er)增長(chang)，熱(re)電(dian)(dian)(dian)(dian)(dian)動勢的大小(xiao)只和(he)熱(re)電(dian)(dian)(dian)(dian)(dian)偶導體(ti)(ti)材質以及兩端溫(wen)(wen)(wen)差(cha)有關，和(he)熱(re)電(dian)(dian)(dian)(dian)(dian)極(ji)的長(chang)度(du)(du)、直徑無關。鎧裝(zhuang)熱(re)電(dian)(dian)(dian)(dian)(dian)偶的結構原理是(shi)(shi)，是(shi)(shi)由導體(ti)(ti)、高絕緣(yuan)氧化鎂、外套(tao)1Cr18Ni9Ti不銹鋼保護(hu)管(guan)，經多(duo)次一(yi)體(ti)(ti)拉制而(er)成。鎧裝(zhuang)熱(re)電(dian)(dian)(dian)(dian)(dian)偶產(chan)品主要(yao)由接線(xian)盒、接線(xian)端子(zi)(zi)和(he)鎧裝(zhuang)熱(re)電(dian)(dian)(dian)(dian)(dian)偶組成基本結構，并(bing)配以各種(zhong)安(an)裝(zhuang)固定裝(zhuang)置(zhi)組成。

編輯本段特點

鎧裝熱(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)是(shi)(shi)溫(wen)度(du)(du)(du)(du)測(ce)量中應(ying)(ying)用zui廣泛的(de)(de)(de)(de)溫(wen)度(du)(du)(du)(du)器件，他(ta)的(de)(de)(de)(de)主要特點(dian)就(jiu)是(shi)(shi)測(ce)溫(wen)范圍寬，性能比較穩定(ding)，同時結構(gou)簡(jian)單，動(dong)態響應(ying)(ying)好(hao)，更能夠遠傳4-20mA電(dian)(dian)(dian)(dian)信號，便(bian)于自動(dong)控制和集中控制。熱(re)(re)(re)電(dian)(dian)(dian)(dian)偶(ou)的(de)(de)(de)(de)測(ce)溫(wen)原(yuan)理是(shi)(shi)基于熱(re)(re)(re)電(dian)(dian)(dian)(dian)效應(ying)(ying)。將兩(liang)(liang)種不同的(de)(de)(de)(de)導(dao)體或半導(dao)體連(lian)接(jie)成閉合回路，當兩(liang)(liang)個接(jie)點(dian)處的(de)(de)(de)(de)溫(wen)度(du)(du)(du)(du)不同時，回路中將產(chan)生(sheng)熱(re)(re)(re)電(dian)(dian)(dian)(dian)勢(shi)(shi)，這種現象稱為(wei)熱(re)(re)(re)電(dian)(dian)(dian)(dian)效應(ying)(ying)，又稱為(wei)塞貝(bei)克效應(ying)(ying)。閉合回路中產(chan)生(sheng)的(de)(de)(de)(de)熱(re)(re)(re)電(dian)(dian)(dian)(dian)勢(shi)(shi)有兩(liang)(liang)種電(dian)(dian)(dian)(dian)勢(shi)(shi)組(zu)成；溫(wen)差電(dian)(dian)(dian)(dian)勢(shi)(shi)和接(jie)觸電(dian)(dian)(dian)(dian)勢(shi)(shi)。溫(wen)差電(dian)(dian)(dian)(dian)勢(shi)(shi)是(shi)(shi)指同一導(dao)體的(de)(de)(de)(de)兩(liang)(liang)端因溫(wen)度(du)(du)(du)(du)不同而產(chan)生(sheng)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)勢(shi)(shi)，不同的(de)(de)(de)(de)導(dao)體具(ju)有不同的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)子密度(du)(du)(du)(du)，所以(yi)他(ta)們(men)(men)產(chan)生(sheng)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)勢(shi)(shi)也不相同，而接(jie)觸電(dian)(dian)(dian)(dian)勢(shi)(shi)顧名思義就(jiu)是(shi)(shi)指兩(liang)(liang)種不同的(de)(de)(de)(de)導(dao)體相接(jie)觸時，因為(wei)他(ta)們(men)(men)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)子密度(du)(du)(du)(du)不同所以(yi)產(chan)生(sheng)一定(ding)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)子擴散，當他(ta)們(men)(men)達到一定(ding)的(de)(de)(de)(de)平衡(heng)后所形成的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)勢(shi)(shi)，接(jie)觸電(dian)(dian)(dian)(dian)勢(shi)(shi)的(de)(de)(de)(de)大小取決(jue)于兩(liang)(liang)種不同導(dao)體的(de)(de)(de)(de)材(cai)料性質(zhi)以(yi)及他(ta)們(men)(men)接(jie)觸點(dian)的(de)(de)(de)(de)溫(wen)度(du)(du)(du)(du)。

上應用的熱電偶具有一個標準規范，上規定熱電偶分為八個不同的分度，分別為B，R，S，K，N，E，J和T，其測量溫度的zui低可測零下270攝氏度，zui高可達1800攝氏度，其中B，R，S屬于鉑系列的熱

電(dian)(dian)(dian)偶(ou)(ou)(ou)，由于(yu)鉑(bo)屬(shu)(shu)于(yu)貴(gui)重金(jin)屬(shu)(shu)，所以(yi)他們又被稱為(wei)(wei)貴(gui)金(jin)屬(shu)(shu)熱(re)電(dian)(dian)(dian)偶(ou)(ou)(ou)而剩下的(de)(de)(de)幾個則(ze)稱為(wei)(wei)廉價金(jin)屬(shu)(shu)熱(re)電(dian)(dian)(dian)偶(ou)(ou)(ou)。熱(re)電(dian)(dian)(dian)偶(ou)(ou)(ou)的(de)(de)(de)結構有兩種(zhong)(zhong)，普通型(xing)(xing)和(he)鎧(kai)裝(zhuang)型(xing)(xing)。普通性熱(re)電(dian)(dian)(dian)偶(ou)(ou)(ou)一(yi)(yi)(yi)般(ban)由熱(re)電(dian)(dian)(dian)極，絕緣(yuan)管(guan)，保(bao)護(hu)套(tao)(tao)管(guan)和(he)接線(xian)(xian)(xian)(xian)(xian)盒等部(bu)分組(zu)成，而鎧(kai)裝(zhuang)型(xing)(xing)熱(re)電(dian)(dian)(dian)偶(ou)(ou)(ou)則(ze)是(shi)將(jiang)熱(re)電(dian)(dian)(dian)偶(ou)(ou)(ou)絲(si)，絕緣(yuan)材(cai)料和(he)金(jin)屬(shu)(shu)保(bao)護(hu)套(tao)(tao)管(guan)三者組(zu)合裝(zhuang)配(pei)后(hou)，經過拉(la)伸加(jia)工(gong)而成的(de)(de)(de)一(yi)(yi)(yi)種(zhong)(zhong)堅實(shi)的(de)(de)(de)組(zu)合體。但是(shi)熱(re)電(dian)(dian)(dian)偶(ou)(ou)(ou)的(de)(de)(de)電(dian)(dian)(dian)信號卻(que)需要(yao)一(yi)(yi)(yi)種(zhong)(zhong)特殊的(de)(de)(de)導線(xian)(xian)(xian)(xian)(xian)來進(jin)行(xing)傳遞，這(zhe)種(zhong)(zhong)導線(xian)(xian)(xian)(xian)(xian)我們稱為(wei)(wei)補(bu)(bu)償(chang)(chang)(chang)導線(xian)(xian)(xian)(xian)(xian)。不同(tong)的(de)(de)(de)熱(re)電(dian)(dian)(dian)偶(ou)(ou)(ou)需要(yao)不同(tong)的(de)(de)(de)補(bu)(bu)償(chang)(chang)(chang)導線(xian)(xian)(xian)(xian)(xian)，其主(zhu)要(yao)作用(yong)就是(shi)與熱(re)電(dian)(dian)(dian)偶(ou)(ou)(ou)連接，使(shi)熱(re)電(dian)(dian)(dian)偶(ou)(ou)(ou)的(de)(de)(de)參(can)比端(duan)(duan)遠(yuan)離(li)電(dian)(dian)(dian)源，從而使(shi)參(can)比端(duan)(duan)溫度(du)穩定。補(bu)(bu)償(chang)(chang)(chang)導線(xian)(xian)(xian)(xian)(xian)又分為(wei)(wei)補(bu)(bu)償(chang)(chang)(chang)型(xing)(xing)和(he)延長型(xing)(xing)兩種(zhong)(zhong)，延長導線(xian)(xian)(xian)(xian)(xian)的(de)(de)(de)化學成分與被補(bu)(bu)償(chang)(chang)(chang)的(de)(de)(de)熱(re)電(dian)(dian)(dian)偶(ou)(ou)(ou)相同(tong)，但是(shi)實(shi)際中，延長型(xing)(xing)的(de)(de)(de)導線(xian)(xian)(xian)(xian)(xian)也(ye)并不是(shi)用(yong)和(he)熱(re)電(dian)(dian)(dian)偶(ou)(ou)(ou)相同(tong)材(cai)質(zhi)的(de)(de)(de)金(jin)屬(shu)(shu)，一(yi)(yi)(yi)般(ban)采(cai)用(yong)和(he)熱(re)電(dian)(dian)(dian)偶(ou)(ou)(ou)具(ju)有相同(tong)電(dian)(dian)(dian)子(zi)密(mi)度(du)的(de)(de)(de)導線(xian)(xian)(xian)(xian)(xian)代替。補(bu)(bu)償(chang)(chang)(chang)導線(xian)(xian)(xian)(xian)(xian)的(de)(de)(de)與熱(re)電(dian)(dian)(dian)偶(ou)(ou)(ou)的(de)(de)(de)連線(xian)(xian)(xian)(xian)(xian)一(yi)(yi)(yi)般(ban)都是(shi)很明(ming)了(le)，熱(re)電(dian)(dian)(dian)偶(ou)(ou)(ou)的(de)(de)(de)正極連接補(bu)(bu)償(chang)(chang)(chang)導線(xian)(xian)(xian)(xian)(xian)的(de)(de)(de)紅色線(xian)(xian)(xian)(xian)(xian)，而負極則(ze)連接剩下的(de)(de)(de)顏(yan)色。一(yi)(yi)(yi)般(ban)的(de)(de)(de)補(bu)(bu)償(chang)(chang)(chang)導線(xian)(xian)(xian)(xian)(xian)的(de)(de)(de)材(cai)質(zhi)大部(bu)分都采(cai)用(yong)銅鎳(nie)合金(jin)。

編輯本段冷端的溫度補償

由于鎧(kai)裝(zhuang)熱(re)(re)電(dian)偶的(de)(de)(de)(de)材料(liao)一般(ban)都比較(jiao)貴重（特別是采(cai)用(yong)貴金屬時(shi)），而測溫(wen)點到(dao)(dao)(dao)儀表的(de)(de)(de)(de)距離都很遠，為(wei)了節(jie)省(sheng)鎧(kai)裝(zhuang)熱(re)(re)電(dian)偶材料(liao)，降低成本，通常采(cai)用(yong)補償(chang)導線(xian)(xian)把鎧(kai)裝(zhuang)熱(re)(re)電(dian)偶的(de)(de)(de)(de)冷(leng)端(duan)（自由端(duan)）延(yan)伸(shen)到(dao)(dao)(dao)溫(wen)度比較(jiao)穩定的(de)(de)(de)(de)控制室內，連(lian)接到(dao)(dao)(dao)儀表端(duan)子(zi)(zi)上(shang)。必(bi)須(xu)指出，熱(re)(re)電(dian)偶補償(chang)導線(xian)(xian)的(de)(de)(de)(de)作(zuo)用(yong)只起延(yan)伸(shen)熱(re)(re)電(dian)極，使(shi)鎧(kai)裝(zhuang)熱(re)(re)電(dian)偶的(de)(de)(de)(de)冷(leng)端(duan)移(yi)動到(dao)(dao)(dao)控制室的(de)(de)(de)(de)儀表端(duan)子(zi)(zi)上(shang)，它本身并不(bu)能(neng)消除(chu)冷(leng)端(duan)溫(wen)度變化對測溫(wen)的(de)(de)(de)(de)影響(xiang)，不(bu)起補償(chang)作(zuo)用(yong)。因(yin)此，還(huan)需(xu)采(cai)用(yong)其他修(xiu)正方法來補償(chang)冷(leng)端(duan)溫(wen)度t0≠0℃時(shi)對測溫(wen)的(de)(de)(de)(de)影響(xiang)。 在使(shi)用(yong)鎧(kai)裝(zhuang)熱(re)(re)電(dian)偶補償(chang)導線(xian)(xian)時(shi)必(bi)須(xu)注意型號相(xiang)配，極性不(bu)能(neng)接錯，補償(chang)導線(xian)(xian)與鎧(kai)裝(zhuang)熱(re)(re)電(dian)偶連(lian)接端(duan)的(de)(de)(de)(de)溫(wen)度不(bu)能(neng)超過(guo)100℃。

編輯本段測溫原理

電偶是用兩種不同成份的導體焊接在一起，兩端溫度不同時，在回路中就會有熱電勢產生，因此勢電偶

鎧裝熱電偶

是(shi)通過(guo)測量電勢從而測量溫度的一種感溫原件(jian)，它(ta)是(shi)一種變換器，它(ta)能將溫度信號轉變為電信號再由顯示儀表顯示出來。

熱(re)(re)(re)電(dian)(dian)(dian)偶測量(liang)溫(wen)度(du)(du)(du)的(de)(de)(de)基本原理(li)是熱(re)(re)(re)電(dian)(dian)(dian)效應(ying)，將兩(liang)種不(bu)(bu)同成份(fen)的(de)(de)(de)金(jin)(jin)屬導體(ti)首(shou)尾相連接(jie)(jie)(jie)(jie)成閉合(he)回(hui)路，如兩(liang)接(jie)(jie)(jie)(jie)點的(de)(de)(de)溫(wen)度(du)(du)(du)不(bu)(bu)等，則在回(hui)路中就(jiu)(jiu)會產生熱(re)(re)(re)電(dian)(dian)(dian)動(dong)勢(shi)，形成熱(re)(re)(re)電(dian)(dian)(dian)流(liu)，這就(jiu)(jiu)是熱(re)(re)(re)電(dian)(dian)(dian)效應(ying)。熱(re)(re)(re)電(dian)(dian)(dian)偶就(jiu)(jiu)是將兩(liang)種不(bu)(bu)同的(de)(de)(de)金(jin)(jin)屬材料一端(duan)(duan)(duan)(duan)焊(han)接(jie)(jie)(jie)(jie)而成，焊(han)接(jie)(jie)(jie)(jie)的(de)(de)(de)一端(duan)(duan)(duan)(duan)叫做測量(liang)端(duan)(duan)(duan)(duan)，未焊(han)接(jie)(jie)(jie)(jie)的(de)(de)(de)一端(duan)(duan)(duan)(duan)叫做參(can)考端(duan)(duan)(duan)(duan)，參(can)考端(duan)(duan)(duan)(duan)在使用時通常恒(heng)定在一定的(de)(de)(de)溫(wen)度(du)(du)(du)(如00C)當對測量(liang)端(duan)(duan)(duan)(duan)加熱(re)(re)(re)時，在接(jie)(jie)(jie)(jie)點處(chu)有(you)熱(re)(re)(re)電(dian)(dian)(dian)勢(shi)產生。如參(can)考端(duan)(duan)(duan)(duan)溫(wen)度(du)(du)(du)恒(heng)定，其熱(re)(re)(re)電(dian)(dian)(dian)勢(shi)的(de)(de)(de)大小和(he)方(fang)向只與兩(liang)種金(jin)(jin)屬材料的(de)(de)(de)特性和(he)測量(liang)端(duan)(duan)(duan)(duan)的(de)(de)(de)溫(wen)度(du)(du)(du)有(you)關(guan)(guan)，而與勢(shi)電(dian)(dian)(dian)偶的(de)(de)(de)精細(xi)和(he)長短無關(guan)(guan)。當測量(liang)端(duan)(duan)(duan)(duan)的(de)(de)(de)溫(wen)度(du)(du)(du)改變(bian)后(hou)，勢(shi)電(dian)(dian)(dian)勢(shi)也隨之改變(bian)，并且溫(wen)度(du)(du)(du)和(he)熱(re)(re)(re)電(dian)(dian)(dian)勢(shi)之間有(you)一固定的(de)(de)(de)函(han)數關(guan)(guan)系，利用這個(ge)關(guan)(guan)系就(jiu)(jiu)可以測量(liang)溫(wen)度(du)(du)(du)。

編輯本段測量范圍

常(chang)用(yong)的溫(wen)度(du)儀表(biao)有鎧裝熱(re)電偶。

鎧裝熱電偶：測量500℃以上的高溫，火電廠種主蒸汽的溫度，過熱起管壁溫度，高溫煙氣溫度。特點：

能(neng)(neng)(neng)測(ce)(ce)量(liang)(liang)(liang)高(gao)(gao)溫(wen)，性能(neng)(neng)(neng)穩定(ding)，準確可(ke)靠、結(jie)構簡單、易于(yu)維護、便于(yu)信號(hao)(hao)的(de)遠(yuan)(yuan)傳和實現多(duo)點切換測(ce)(ce)量(liang)(liang)(liang)。主要(yao)的(de)型號(hao)(hao)：分度(du)(du)(du)號(hao)(hao)：S或(huo)(huo)(huo)(huo)LB-3上(shang)(shang)限(xian)(xian)(xian)1300℃（短(duan)時(shi)(shi)(shi)1600℃）。B或(huo)(huo)(huo)(huo)LL-2上(shang)(shang)限(xian)(xian)(xian)1600℃（短(duan)時(shi)(shi)(shi)1800℃）K或(huo)(huo)(huo)(huo)EU-2上(shang)(shang)限(xian)(xian)(xian)1200℃（短(duan)時(shi)(shi)(shi)1300℃）T或(huo)(huo)(huo)(huo)CK上(shang)(shang)限(xian)(xian)(xian)-200～350℃（短(duan)時(shi)(shi)(shi)400℃）E或(huo)(huo)(huo)(huo)EA-2上(shang)(shang)限(xian)(xian)(xian)-200～900℃熱(re)電(dian)(dian)阻：測(ce)(ce)量(liang)(liang)(liang)精度(du)(du)(du)高(gao)(gao)、性能(neng)(neng)(neng)穩定(ding)、靈敏度(du)(du)(du)高(gao)(gao)、應(ying)(ying)用范(fan)(fan)圍(wei)廣、可(ke)遠(yuan)(yuan)距離(li)(li)策問(wen)、實現溫(wen)度(du)(du)(du)自動(dong)控制和記錄(lu)。鉑熱(re)電(dian)(dian)阻，zui高(gao)(gao)測(ce)(ce)溫(wen)650℃，Pt50,Pt100,銅電(dian)(dian)阻：50-150℃Cu50,Cu100。注意：自熱(re)效應(ying)(ying)引起的(de)誤差，Pt工作d電(dian)(dian)流為小于(yu)6mA，遲(chi)滯(zhi)帶來(lai)的(de)影響，熱(re)容量(liang)(liang)(liang)大，充分的(de)熱(re)交換，測(ce)(ce)量(liang)(liang)(liang)才準確。安裝(zhuang)：安裝(zhuang)時(shi)(shi)(shi)，與被測(ce)(ce)介質形成(cheng)逆流，至(zhi)少成(cheng)90° 分度(du)(du)(du)號(hao)(hao)：S或(huo)(huo)(huo)(huo)LB-3上(shang)(shang)限(xian)(xian)(xian)1300℃（短(duan)時(shi)(shi)(shi)1600℃）。B或(huo)(huo)(huo)(huo)LL-2上(shang)(shang)限(xian)(xian)(xian)1600℃（短(duan)時(shi)(shi)(shi)1800℃）K或(huo)(huo)(huo)(huo)EU-2上(shang)(shang)限(xian)(xian)(xian)1200℃（短(duan)時(shi)(shi)(shi)1300℃）T或(huo)(huo)(huo)(huo)CK上(shang)(shang)限(xian)(xian)(xian)-200～350℃（短(duan)時(shi)(shi)(shi)400℃）E或(huo)(huo)(huo)(huo)EA-2上(shang)(shang)限(xian)(xian)(xian)-200～900℃：測(ce)(ce)量(liang)(liang)(liang)精度(du)(du)(du)高(gao)(gao)、性能(neng)(neng)(neng)穩定(ding)、靈敏度(du)(du)(du)高(gao)(gao)、應(ying)(ying)用范(fan)(fan)圍(wei)廣、可(ke)遠(yuan)(yuan)距離(li)(li)策問(wen)、實現溫(wen)度(du)(du)(du)自動(dong)控制和記錄(lu)。鉑，zui高(gao)(gao)測(ce)(ce)溫(wen)650℃，Pt50,Pt100,銅電(dian)(dian)阻：

編輯本段技術指標

不同材料和直徑鎧裝熱電偶型號、分度號及推薦使用溫度電極材料

防噴式鎧裝熱電阻

鎧(kai)裝(zhuang)(zhuang)熱(re)電偶熱(re)響應(ying)時(shi)間(jian)在(zai)溫度出現階(jie)躍變化時(shi)，熱(re)電偶的輸出值變化至相當于該階(jie)躍變化的某個規定百分數(shu)所需要的時(shi)間(jian)，稱為熱(re)響應(ying)時(shi)間(jian)，用(yong)τ表示（取50%時(shi)用(yong)τ0.5表示）。 鎧(kai)裝(zhuang)(zhuang)熱(re)電偶熱(re)響應(ying)時(shi)間(jian)τ0.5（秒）

注：絕緣電(dian)阻用MΩ·m表示，即(ji)為常溫(wen)絕緣電(dian)阻與鎧裝(zhuang)偶長度的乘積。

例(li)如：1000MΩ·m表示：1m長的試(shi)樣的絕緣電阻為

1000MΩ，10m長的試(shi)樣的絕緣電阻(zu)為(wei)100MΩ。

對于長度小于1m的鎧裝偶，按1m計(ji)算。

插座式接(jie)線(xian)盒和(he)帶補償導(dao)線(xian)的鎧裝熱電偶不在此例。

測量范圍和準確度

編輯本段熱響應時間

上海自動化儀表股份有限公司(si)(由上儀*承(cheng)辦）

上(shang)海自(zi)動化儀表(biao)四廠（白(bai)云牌）

上海自動化儀表三廠