Wayar diyya wata waya ce mai rufin rufi wadda take da darajar da ba ta da ma'ana kamar ƙarfin thermoelectromotive na thermocouple ɗin da aka daidaita a wani yanayi na zafin jiki (0~100°C). Kurakurai saboda canjin yanayin zafi a mahaɗin. Editan da ke ƙasa zai gabatar muku da abin da waya diyya ta thermocouple take, menene aikin wayar diyya ta thermocouple, da kuma rarraba wayar diyya ta thermocouple.
1. Wane abu ne ake amfani da shi wajen haɗa waya da thermocouple?
Wayar diyya ta gabaɗaya tana buƙatar na'urorin lantarki masu kyau da marasa kyau su kasance iri ɗaya da kayan thermocouple masu kyau da marasa kyau. Na'urorin thermocouple na nau'in K sune nickel-cadmium (positive) da nickel-silicon (negative), don haka bisa ga ƙa'ida, ya kamata a zaɓi wayoyin diyya na nickel-cadmium-nickel-silicon.
2. Menene aikin wayar diyya ta thermocouple
Yana nufin faɗaɗa wutar lantarki mai zafi, wato, ƙarshen sanyi na thermocouple mai motsi, sannan a haɗa shi da kayan aikin nuni don samar da tsarin auna zafin jiki. Daidai da ƙa'idar ƙasa ta IEC 584-3 "Thermocouple Sashe na 3 - Wayar Magance Kuɗi". Ana amfani da samfuran galibi a cikin na'urori daban-daban na auna zafin jiki, kuma an yi amfani da su sosai a cikin makamashin nukiliya, man fetur, sinadarai, ƙarfe, wutar lantarki da sauran sassa.
3. Rarraba wayoyi masu diyya na thermocouple
A ka'ida, an raba shi zuwa nau'in tsawo da nau'in diyya. Tsarin sinadarai na waya mai ƙarfe na nau'in tsawo iri ɗaya ne da na thermocouple da aka haɗa, don haka ƙarfin thermoelectric shi ma iri ɗaya ne. An wakilta shi da "X" a cikin samfurin, kuma haɗin sinadarai na waya mai ƙarfe na nau'in diyya iri ɗaya ne. Ya bambanta da thermocouple da aka haɗa, amma a cikin kewayon zafin aiki, ƙarfin thermoelectric yana kusa da ƙimar ƙimar thermoelectric na thermocouple da aka haɗa, wanda "C" ke wakilta a cikin samfurin.
An raba daidaiton diyya zuwa matakin yau da kullun da matakin daidai. Kuskuren bayan diyya na matakin daidai yawanci rabin matakin yau da kullun ne, wanda yawanci ana amfani da shi a wurare masu buƙatar daidaiton ma'auni mai girma. Misali, ga wayoyi masu diyya na lambobin kammala karatun S da R, juriyar matakin daidai shine ±2.5°C, kuma juriyar matakin yau da kullun shine ±5.0°C; ga wayoyi masu diyya na lambobin kammala karatun K da N, juriyar matakin daidai shine ±1.5°C, juriyar matakin yau da kullun shine ±2.5℃. A cikin samfurin, ba a yiwa matakin yau da kullun alama ba, kuma an ƙara matakin daidai da "S".
Daga yanayin zafi na aiki, an raba shi zuwa amfani na gabaɗaya da amfani mai jure zafi. Zafin aiki na amfani na gabaɗaya shine 0 ~ 100 °C (ƙaɗan daga cikinsu 0 ~ 70 °C ne);
Bugu da ƙari, za a iya raba tsakiyar wayar zuwa wayoyi masu ramawa guda ɗaya da kuma wayoyi masu yawa (wayoyi masu laushi), kuma za a iya raba su zuwa wayoyi masu ramawa na yau da kullun da waɗanda aka kare dangane da ko suna da layin kariya, kuma akwai kuma wayoyi masu ramawa don da'irori masu aminci waɗanda aka keɓe don lokutan da ba su da fashewa.