Chifukwa chiyani 4 ~ 20mA 2-waya Imakhala Kutulutsa Kwakukulu kwa Transmitter

Pankhani yotumizira ma siginecha pamakina opangira makina, 4 ~ 20mA ndi imodzi mwazosankha zofala. M'malo mwake padzakhala mgwirizano wa mzere pakati pa kusintha kwa ndondomeko (kupanikizika, mlingo, kutentha, ndi zina zotero) ndi zomwe zikuchitika. 4mA imayimira malire otsika, 20mA imayimira malire apamwamba, ndipo kutalika kwake ndi 16mA. Ndiubwino wamtundu wanji womwe umasiyanitsa 4 ~ 20mA kuchokera kuzinthu zina zamakono ndi magetsi ndikukhala otchuka kwambiri?

Panopa ndi magetsi onse amagwiritsidwa ntchito potumiza chizindikiro chamagetsi. Komabe, chizindikiro chamakono chimakonda kwambiri kuposa magetsi ogwiritsira ntchito zida. Chimodzi mwazifukwa zazikulu ndikuti kutulutsa kosalekeza sikungapangitse kutsika kwamagetsi pamayendedwe akutali chifukwa kumatha kukweza magetsi oyendetsa kuti athe kubweza kufalikira. Pakadali pano, poyerekeza ndi siginecha yamagetsi, yapano ikuwonetsa ubale wofananira ndi masinthidwe osinthika omwe amathandizira kuwongolera bwino komanso kubweza.

Kutetezedwa kwa Mphezi Kumiza Level Transmitter, 4 ~ 20mA 2-waya

Mosiyana ndi sikelo yanthawi zonse yamasiku ano (0 ~ 10mA, 0 ~ 20mA etc.) gawo lalikulu la 4 ~ 20mA silimasankha 0mA ngati malire ochepera oyezera. Cholinga chokweza sikelo ya zero kuti ikhale yamoyo ndikuthana ndi vuto la zero lomwe limatanthauza kulephera kuzindikira kuwonongeka kwa dongosolo kumayambitsa kulephera kumabweretsa kutulutsa kwa 0mA kosadziwika ngati sikelo yocheperako ilinso 0mA. Ponena za chizindikiro cha 4 ~ 20mA, kuwonongeka kungathe kudziwika bwino ndi kutsika mosadziwika bwino pansi pa 4mA popeza sikungaganizidwe ngati mtengo woyezera. 

4 ~ 20mA Differential Pressure Transmitter, live zero 4mA

Kuphatikiza apo, malire otsika a 4mA amatsimikizira kugwiritsa ntchito mphamvu pang'ono kuti agwiritse ntchito chidacho pomwe malire a 20mA apamwamba amaletsa kuvulala koopsa kwa thupi la munthu pazifukwa zachitetezo. Chiyerekezo cha 1: 5 chogwirizana ndi makina owongolera pneumatic amathandizira kuwerengera kosavuta komanso kapangidwe kabwinoko. Waya wamakono wa loop-powered 2 uli ndi chitetezo champhamvu cha phokoso ndichosavuta kuyika.

Ubwinowu m'mbali zonse mwachilengedwe umapangitsa 4-20mA kukhala imodzi mwazinthu zosunthika kwambiri pakuwongolera makina. Shanghai WangYuan ndi zaka zoposa 20 zida wopanga. Timapereka zida zabwino kwambiri zokhala ndi 4-20mA kapena zosankha zina zosankhidwa mwamakondakupanikizika, mlingo, kutenthandikuyendakulamulira.