Dalilan aikace -aikacen thermocouple wanda bai cancanta ba

A cewar hukumarthermocouplelambar alamar B, S, K, E da sauran zafin jiki na thermocouple daidai da darajar millivolt (MV), a daidai wannan zafin jiki, ƙimar millivolt (MV) B lambar ita ce mafi ƙanƙanta, lambar S shine mafi ƙanƙanta, K index. lamba ya fi girma, lambar alamar E ita ce mafi girma, bi wannan ka'ida don yin hukunci.

Thermocouples waɗanda suka cancanta ta hanyar bincike da tabbatarwa ba su cancanci amfani ba. Wannan al'amari ba a san shi ba kuma bai tada hankalin mutane ba. Lamarin da bai cancanta ba a cikin aikace-aikacen thermocouple wanda ya haifar da tabbacin shine galibi saboda tasirin inhomogeneity na waya thermocouple, kuskuren shunt na thermocouple mai sulke da rashin amfani da thermocouple mara kyau. Editan hanyar sadarwa na koyo na lantarki ya bayyana asirin a cikin wannan labarin.

Tasirin rashin daidaituwa na waya thermocouple â' Kayan nathermocouplerashin daidaituwa. Lokacin da aka duba thermocouple a cikin dakin aunawa, bisa ga buƙatun ƙa'idodin, zurfin shigarwa a cikin tanderun tabbatarwa na thermocouple shine 300mm. Don haka, sakamakon tabbatarwa na kowane thermocouple zai iya nunawa ko galibi yana nuna wayoyi biyu masu tsayin 300nm daga ƙarshen aunawa. Halin thermoelectric. Koyaya, lokacin da tsayin thermocouple ya yi tsayi, yawancin wayoyi suna cikin yanayin zafin jiki yayin amfani. Idan wayar thermocouple ba ta dace ba kuma tana cikin wani wuri mai yanayin zafi, to wani ɓangarensa zai haifar da ƙarfin thermoelectromotive. Ana kiran wannan ƙarfin electromotive parasitic potential, kuma kuskuren da yiwuwar parasitic ya haifar ana kiransa kuskure iri ɗaya.

Rashin daidaituwa nathermocouplewaya bayan amfani. Game da sabon-yithermocouple, koda wasan kwaikwayon daban -daban ya cika buƙatun, maimaita aiki da lanƙwasawa zai haifar da thermocouple don samar da murdiyar sarrafawa, kuma zai rasa daidaiton sa. Haka kuma, thermocouple zai rasa daidaiton sa yayin da aka yi amfani da shi na dogon lokaci a ƙarƙashin zafin zafin. Rashin tabarbarewar karfin wutar lantarki ya haifar da canjin. Lokacin da ɓangaren ɓarna ya kasance a cikin gida a cikin wurin da zafin zafin jiki, zai kuma samar da ƙarfin wutar lantarki na parasitic wanda aka ɗora akan jimlar ƙarfin thermoelectromotive da gabatar da kuskuren ma'auni.