ʻO ke kaula uku he mau kaula pālua me kahi papa hoʻokaʻawale i loaʻa ka waiwai like me ka ikaika thermoelectromotive o ka thermocouple i hoʻohālikelike ʻia i loko o kahi pae mahana (0 ~ 100 ° C). Nā hewa ma muli o nā loli mahana ma ka hui ʻana. E hōʻike ka mea hoʻoponopono ma hope iā ʻoe i ke ʻano o ka kaula uku thermocouple, he aha ka hana o ke kaula uku thermocouple, a me ka hoʻokaʻawale ʻana o ke kaula uku thermocouple.
1. He aha ka mea o ke kaula hoʻopaʻa thermocouple?
Pono ke kaula uku maʻamau i nā electrodes maikaʻi a me nā electrodes maikaʻi ʻole e like me nā mea maikaʻi a me nā mea maikaʻi ʻole o ka thermocouple. ʻO nā thermocouples ʻano K he nickel-cadmium (maikaʻi) a me nickel-silicon (maikaʻi ʻole), no laila e like me ke kūlana, pono e koho ʻia nā kaula uku nickel-cadmium-nickel-silicon.
2. He aha ka hana o ke kaula uku thermocouple
ʻO ia ke hoʻolōʻihi i ka electrode wela, ʻo ia hoʻi, ka hopena anu o ka thermocouple kelepona, a hoʻopili me ka mea hōʻike e hana i kahi ʻōnaehana ana wela. Hoʻohana like i ke kūlana aupuni o IEC 584-3 "Thermocouple Māhele 3 - Uea Uku". Hoʻohana nui ʻia nā huahana i nā mea ana wela like ʻole, a ua hoʻohana nui ʻia i ka mana nukelea, petroleum, kemika, metallurgy, mana uila a me nā keʻena ʻē aʻe.
3. Ka hoʻokaʻawale ʻana o nā uwea uku thermocouple
Ma ke kumumanaʻo, ua māhele ʻia i ke ʻano hoʻonui a me ke ʻano uku. ʻO ke ʻano kemika inoa o ke kaula hao o ke ʻano hoʻonui ua like ia me ko ka thermocouple i hoʻohālikelike ʻia, no laila ua like nō hoʻi ka hiki ke thermoelectric. Hōʻike ʻia e "X" i loko o ke kumu hoʻohālike, a ua like ke ʻano kemika inoa o ke kaula hao o ke ʻano uku. He ʻokoʻa ia mai ka thermocouple i hoʻohālikelike ʻia, akā i loko o kona pae mahana hana, kokoke ka hiki ke thermoelectric i ka waiwai inoa o ka hiki ke thermoelectric o ka thermocouple i hoʻohālikelike ʻia, i hōʻike ʻia e "C" i loko o ke kumu hoʻohālike.
Ua māhele ʻia ka pololei o ka uku ʻana i ka papa maʻamau a me ka papa pololei. ʻO ka hewa ma hope o ka uku ʻana o ka papa pololei he hapalua wale nō ia o ka papa maʻamau, kahi i hoʻohana pinepine ʻia ma nā wahi me nā koi pololei kiʻekiʻe. No ka laʻana, no nā uea uku o nā helu puka S a me R, ʻo ke ahonui o ka papa pololei he ±2.5°C, a ʻo ke ahonui o ka papa maʻamau he ±5.0°C; no nā uea uku o nā helu puka K a me N, ʻo ke ahonui o ka papa pololei he ±1.5°C, ʻo ke ahonui o ka papa maʻamau he ±2.5℃. I ke kumu hoʻohālike, ʻaʻole i hōʻailona ʻia ka papa maʻamau, a ua hoʻohui ʻia ka papa pololei me "S".
Mai ka mahana hana, ua māhele ʻia i ka hoʻohana maʻamau a me ka hoʻohana pale wela. ʻO ka mahana hana o ka hoʻohana maʻamau he 0 ~ 100 °C (ʻo kekahi he 0 ~ 70 °C);
Eia kekahi, hiki ke hoʻokaʻawale ʻia ke kumu uea i nā uea uku hoʻokahi kaula a me nā kumu he nui (uea palupalu), a hiki ke hoʻokaʻawale ʻia i nā uea uku maʻamau a me nā uea pale ʻia e like me ko lākou papa pale, a aia kekahi mau uea uku no nā kaapuni palekana kūloko i hoʻolaʻa ʻia no nā hanana pahū-pahū.