RTD inzwa

Ikhono of izinsimbi ukushintsha izakhiwo zabo ezingokwenyama ngaphansi kwethonya lokushisa is kabanzi instrumentation. Ngakho, ngokwesibonelo, i-platinum ukumelana lokushisa isebenzisa impahla metal ukwandisa yayo ukumelana kagesi nge okwandisa izinga lokushisa. Ngokwesibonelo, ngo-t = 0 ^C.-platinum has a resistivity ka ohms 100.

Ukumelana Thermometer - a imitha control, okuyinto okuhambisa kumlawuli isiginali impedance zamanje phakathi oxhumana inzwa. Isilawuli IZINHLELO idatha bese ubathumela ohlelweni SCADA, lapho opharetha ungabona isimo samanje izinga lokushisa senqubo yokukhiqiza. A izinga lokushisa ukumelana isetshenziswa njengophawu zamakhemikhali production lokukhanda.

inzwa design ulula. Ukumelana yethusi thermometer yakhiwa oxhumana amathathu, amabili avalwa komunye nomunye, kanti eyesithathu - inani, it has a ukumelana ohms 120. ukuxhuma uhlelo ezintathu-wire ngokuyinhloko, noma kukhona okuhlukile. Ikhebula kusuka kudivayisi control kumele bavikelwe ukuphazamiseka third-party. Akumele wabeka kanye izintambo kagesi futhi kufanele avikelwe.

Operating wesifunda simi ngale ndlela: RTD - isithiyo - okuzenzakalelayo elawula uhlelo. Idivayisi ogibele piping, inqubo amakholomu, esetshenziselwa lokushisa nesilinganiso e amabombo amaphampu ukusebenza. Umsebenzi RTD kuyinto linesizotha futhi anembile ukufundwa zalo zihlukile esiphezulu langempela 0.7 degrees.

Njengoba umklamo thuluzi uqobo, njengoba thermometer ukumelana, sihlobene ngokuqondile namaphuzu ukufudumeza ukudluliswa kusuka medium a Resistor ke ukufakwa kunakwe futhi ngendawo yenzwa. I piping kumele ngci, at iphuzu kunikezwa medium ukugeleza rate kufanele lenziwe laba likhulu. I iphutha nesilinganiso kunganciphisa ushintsho esimweni sengqondo sokuba obuphelele inzwa induku ukuze ubukhulu TC. Kunalokho iyoba-bezitshela ukuthi kungcono uyoba yini umphumela. Ukujula ukucwiliswa kumele ibalwe nesimo medium ukudluliswa ukushisa ukuze kulinganiswe. Ngokwesibonelo, e ephezulu ukushisa ezindaweni ezifana umusi noma uketshezi kufanele idlule izikhathi 1.5 ubude asebenzayo zedivayisi ukumelana lokushisa.

"Thermowell" qala ulungise phakathi nokufaka ukukhethwa indawo. Lolu hlobo emikhonweni zokuzivikela, okuhloswe ukuba lula disassembly zedivayisi, ukuze inzwa ungayithola enye ngaphandle kokuma inqubo. Njengoba uhla lokushisa nesilinganiso ungaphakathi uhla degrees 200 kuya kwangu-600 Celsius, emkhonweni zokuzivikela is eyenziwe ngensimbi engagqwali. Uma kusetshenziswe nolaka ezindaweni esidi noma eziyisisekelo liner camera nge polymer Ukwakheka ekhethekile amelana medium kukalwa.

Ukumelana thermometer ukhiqizwa emazweni amaningi emhlabeni wonke. Leyo mikhumbi kunazo owaziwa: American "ULIMI", Russian "Metran" futhi European "Endress Hauser". Lezi amadivayisi abe ngezinga eliphezulu ngokuthembeka. Ababona kuphela bakwazi ukudlulisa ezingeni lokushisa elifanayo, kodwa futhi zangisiza ekwenzeni izilinganiso ngaleso lokushisa oguqukayo.