ʻO ka uea pānaʻi he ʻelua mau uea me kahi papa insulating i loaʻa ka waiwai nominal like me ka ikaika thermoelectromotive o ka thermocouple i hoʻohālikelike ʻia i kahi pae wela (0~100°C). Nā hewa ma muli o ka hoʻololi ʻana o ka mahana ma ka hui. Na ka mea hoʻoponopono ma lalo nei e hoʻolauna iā ʻoe i ke ʻano o ka uea uku thermocouple, he aha ka hana o ka uea uku thermocouple, a me ka hoʻokaʻawale ʻana o ka uea uku thermocouple.
1. He aha ka mea o ka thermocouple uea uku?
Pono ka uea uku maʻamau i nā electrodes maikaʻi a me nā mea maikaʻi ʻole e like me nā mea maikaʻi a maikaʻi ʻole o ka thermocouple. ʻO nā thermocouple K-type he nickel-cadmium (maikaʻi) a me ka nickel-silicon (negative), no laila e like me ka maʻamau, pono e koho ʻia nā uea uku nickel-cadmium-nickel-silicon.
2. He aha ka hana o ka uwea uku thermocouple
ʻO ia ke hoʻolōʻihi i ka electrode wela, ʻo ia hoʻi, ka hopena anu o ka thermocouple mobile, a hoʻopili me ka mea hōʻike e hana i kahi ʻōnaehana ana wela. Hoʻohana like i ke kūlana aupuni o IEC 584-3 "Thermocouple Part 3 - Uea Uku". Hoʻohana nui ʻia nā huahana i nā ʻano ana wela, a ua hoʻohana nui ʻia i ka mana nuklea, petroleum, kemika, metallurgy, mana uila a me nā keʻena ʻē aʻe.
3. Hoʻohui ʻia o nā uea uku thermocouple
Ma ke kumu, ua māhele ʻia i ke ʻano hoʻonui a me ke ʻano uku. ʻO ke ʻano kemika nominal o ka uea huila o ke ʻano hoʻolōʻihi ua like ia me ka thermocouple i hoʻohālikelike ʻia, no laila ua like pū ka hiki ke thermoelectric. Hōʻike ʻia ʻo ia e "X" ma ke ʻano hoʻohālike, a ʻo ke ʻano kemika nominal o ka uea alloy o ke ʻano uku like. He ʻokoʻa ia mai ka thermocouple i hoʻohālikelike ʻia, akā i loko o kāna ʻano wela hana, ua kokoke ka mana thermoelectric i ka waiwai nominal o ka hiki thermoelectric o ka thermocouple i hoʻohālikelike ʻia, i hōʻike ʻia e "C" i ke kumu hoʻohālike.
Hoʻokaʻawale ʻia ka pololei o ka uku i ka māka maʻamau a me ka māka pololei. ʻO ka hapa ma hope o ka uku ʻana i ka māka pololei, ʻo ka hapa wale nō ia o ka helu maʻamau, ka mea maʻamau i hoʻohana ʻia ma nā wahi me nā koi pono ana kiʻekiʻe. No ka laʻana, no nā uea uku o nā helu puka puka S a me R, ʻo ka ʻae ʻana o ka māka pololei ʻo ± 2.5 ° C, a ʻo ka ʻae ʻana o ka papa maʻamau ʻo ± 5.0 ° C; no nā uea uku o nā helu puka K a me N, ʻo ka ʻae ʻana o ka māka pololei ʻo ± 1.5 ° C, ʻo ka ʻae ʻana o ka papa maʻamau ʻo ± 2.5 ℃. Ma ke kŘkohu, 'a'ole i kaha 'ia ka papa ma'amau, a ua ho'ohui 'ia ka papa pololei me "S".
Mai ka mahana hana, ua māhele ʻia i ka hoʻohana maʻamau a me ka hoʻohana wela. ʻO ka mahana hana o ka hoʻohana maʻamau ʻo 0 ~ 100 °C (kahi liʻiliʻi he 0 ~ 70 °C);
Eia hou, hiki ke hoʻokaʻawale ʻia ke kumu uea i nā uea uku hoʻokahi a me ka multi-core (wiea palupalu), a hiki ke hoʻokaʻawale ʻia i nā uea uku maʻamau a pale ʻia e like me ka loaʻa ʻana o kahi pale pale, a he mau uea hoʻi no ka uku. nā kaapuni palekana i hoʻolaʻa ʻia i nā manawa pahū.