Isitholi Sokushisa Sokumelana (RTD), eyaziwa nangokuthi ukumelana nokushisa, iyinzwa yokushisa esebenza ngesimiso sokulinganisa ukuthi ukumelana kukagesi kwezinto ze-chip yenzwa kuyashintsha ngokushisa. Lesi sicikwenza i-RTD ibe inzwa ethembekile nenembile yokulinganisa izinga lokushisa ezinhlotsheni ezahlukene zezimboni. Uma ihlanganiswe kumshini wokudlulisa izinga lokushisa, iba ithuluzi elinamandla lokuqapha nokulawula izinga lokushisa ezinqubweni kanyebadlala indima ebalulekile ezinhlelweni zokulawula izinqubo zezimboni.
I-Pt100 ingenye yezindlela ezithandwa kakhulu zokumelana nokushisa ezenziwe ngeplatinum kulezi zinsuku. Enye yezinzuzo zokusebenzisa izinzwa zokushisa ze-Pt100 ukunemba kwazo okuphezulu. Lezi zinzwa zenzelwe ukunikeza izilinganiso zokushisa ezinembile,okwenza zifanelekele izindawo zezimboni noma zelebhu ezidinga kakhulu. Kungakhathaliseki ukuthi ukuqapha umusi womoya, uketshezi, noma amagesi, izinzwa ze-Pt100 zinganikeza ukufundwa okunembile, ziqinisekise ukuthi izinqubo zihamba kahle futhi ngempumelelo. I-Pt100Izinzwa zaziwa nangokuhlala isikhathi eside kwazo. Zenzelwe ukumelana nezimo zemvelo ezinzima, okwenza zibe zilungele ukusetshenziswa ezindaweni zezimboni lapho ukushintshashintsha kwezinga lokushisa kanye nokuchayeka kumakhemikhali noma umswakama kuncishisiwe.okuvamile. Lokhu kwakhiwa okuqinile kuqinisekisa ukuthi izinzwa ze-Pt100 zingaqhubeka nokunikeza izilinganiso ezinembile ngisho nasezimweni zokusebenza ezinzima.
Aumthumeli wokushisaiyakwazi ukuguqula ukumelana kwenzwa ye-Pt100 ibe isignali ejwayelekile engu-4-20mA, engadluliselwa ezinhlelweni zokulawula ukuze kuqashwe futhi kulawulwe izinqubo. Lokhu kusebenza kwenza ama-transmitter okushisa e-Pt100 abe yizingxenye ezibalulekile ezinhlelweni zokulawula ezenzakalelayo zezimboni, okuvumela ukuhlanganiswa okungenamthungo nemishini nezinqubo ezikhona. Uma kucatshangelwa ukusetshenziswa kwe-transmitter yokushisa ye-RTD, kufanele kucatshangelwe amapharamitha amaningana abalulekile. Lokhu kufaka phakathi ukuxhumana kwenqubo, ukujula kokufakwa, kanye nobubanzi benduku, okungathinta kakhulu ukunemba nokuthembeka kokulinganiswa kokushisa. Ngaphezu kwalokho, umkhiqizo uyatholakala futhi ngezinketho ezingaqhumi kanye ne-thermowell, okuqinisekisa ukuphepha nokuqina ezindaweni zezimboni eziyinselele.. Izinketho zesignali yokukhipha zifaka iphrothokholi engu-4-20mA, RS-485, kanye ne-HART, okwenza izinto ezisetshenziswayo zihambisane nezinhlelo zokulawula zezimboni ezahlukene.
Thina, iShanghai Wangyuan Instruments of Measurement Co., Ltd. siyibhizinisi elihamba phambili lobuchwepheshe obuphezulu laseShayina eligxile kubuchwepheshe bokulawula izinqubo zezimboni kanye nemikhiqizo amashumi eminyaka futhi sinikeza ikhwalithi ephezulu engenziwa ngokwezifiso.ama-transmitter e-temperatruengesici senzwa se-Pt100 sokunakekela izidingo ezithile zesayithi ngalinye lomkhakha.
Isikhathi sokuthunyelwe: Disemba 22-2023