Ama-pressure transmitters ayizingxenye ezibalulekile ezisetshenziswa ezimbonini ezikala amanani angokwenyama angewona awogesi, njengezinga lokushisa, ingcindezi, isivinini kanye ne-engeli.Ngokujwayelekile, ama-transmitter angu-4-20mA afika ngezinhlobo ezintathu: ama-transmitters anezintambo ezine (izintambo ezimbili zokuphakela amandla nezintambo ezimbili eziphumayo zamanje), ama-transmitters anezintambo ezintathu (okukhiphayo kwamanje namandla abelana ngocingo olulodwa), kanye nama-transmitters anezintambo ezimbili.
Kulesi sihloko, sizoxoxa ngezinzuzo ze-two-wire pressure transmitter, uhlobo lwe-pressure transmitter oluthole ukuthandwa eminyakeni yamuva.Nazi ezinye zezinzuzo ezibalulekile zama-transmitter womfutho wezintambo ezimbili:
1. Ukungenwa kalula kwama-thermocouples angama-parasitic kanye nokwehla kwamandla kagesi: Izidluliseli zomfutho wezintambo ezimbili azithinteki kalula kuma-thermocouples angama-parasitic kanye nokwehla kwamandla kagesi ocingweni, okubavumela ukuthi basebenzise izintambo ezizacile, nezingabizi kakhulu.Lokhu kungonga inani elibalulekile lekhebula nezindleko zokuyifaka.
2. Ukwehliswa kokuphazamiseka kazibuthe kagesi: Uma ukumelana kokuphumayo komthombo wamanje kukhulu ngokwanele, i-voltage edalwe yinkundla kazibuthe ehlangana kuluphu yocingo ngokuvamile ayisho lutho.Lokhu kungenxa yokuthi umthombo wokuphazamiseka udala umsinga omncane ongancishiswa kusetshenziswa izintambo ezisontekile.
3. Ubude bekhebula ende: Ukuphazamiseka kwe-capacitive kungabangela amaphutha ekumelaneni nomamukeli.Nokho, ku-4-20mA iluphu yezintambo ezimbili, ukumelana komamukeli kuvamise ukuba ngu-250Ω, okuncane ngokwanele ukukhiqiza amaphutha angasho lutho.Lokhu kuvumela ubude bekhebula ende nangaphezulu uma kuqhathaniswa nezinhlelo ze-voltage telemetry.
4. Ukuguquguquka ekukhethweni kwesiteshi: Imishini ehlukahlukene yesibonisi esisodwa noma yokuqopha ingashintshwa phakathi kwamashaneli ahlukene anobude obuhlukene bekhebula ngaphandle kokubangela umehluko wokunemba.Lokhu kuvumela ukutholwa kwedatha okunwetshiwe kanye nokulawula endaweni eyodwa.
5. Ukutholwa kwamaphutha kalula: Ukusebenzisa i-4mA yezinga elinguziro kwenza kube lula ukuthola amasekhethi avuliwe, amasekhethi amafushane, noma umonakalo wezinzwa (isimo se-0mA).
6. Kulula ukwengeza izisetshenziswa zokuvikela ukukhuphuka: Imishini yokuvikela i-surgery ingangezwa kalula embobeni yokukhipha izintambo ezimbili, ikwenze iphephe futhi imelane kakhudlwana nombani nokukhuphuka.
Sengiphetha, ama-transmitters anezintambo ezimbili anikezela ngezinzuzo ezimbalwa ngaphezu kwezinye izinhlobo zama-transmitter, njengokunciphisa ukungenwa kalula kwama-thermocouples e-parasitic kanye nokwehla kwamandla kagesi, ukuphazamiseka okuncishisiwe kwe-electromagnetic, ubude bekhebula ende, ukuguquguquka ekukhethweni kwesiteshi, ukutholwa kwamaphutha okulula, kanye nokwengeza okulula kokuhlinzwa. amadivaysi okuvikela.Ngalezi zinzuzo, izidlulisi zokucindezela ezinezintambo ezimbili sezithandwa kakhulu ezinhlelweni zezimboni ezidinga izilinganiso zengcindezi ezinembile nezithembekile.
Isikhathi sokuthumela: Apr-25-2023