Chifukwa chiyani waya wa 4 ~ 20mA 2-waya umakhala waukulu kwambiri wotulutsa chotumizira

Ponena za kutumiza chizindikiro cha transmitter mu ntchito zamafakitale zodziyimira pawokha, 4~20mA ndi imodzi mwazosankha zodziwika kwambiri. Ngati padzakhala ubale wolunjika pakati pa kusintha kwa njira (kupanikizika, mulingo, kutentha, ndi zina zotero) ndi mphamvu yamagetsi. 4mA ikuyimira malire otsika, 20mA ikuyimira malire apamwamba, ndipo kutalika kwa magetsi ndi 16mA. Ndi mitundu yanji ya ubwino yomwe imasiyanitsa 4~20mA ndi mphamvu zina zamagetsi ndi magetsi ndipo imakhala yotchuka kwambiri?

Mphamvu yamagetsi ndi mphamvu yamagetsi zonse zimagwiritsidwa ntchito potumiza chizindikiro chamagetsi. Komabe mphamvu yamagetsi ndi yabwino kwambiri kuposa mphamvu yamagetsi mu ntchito zamagetsi. Chimodzi mwa zifukwa zazikulu ndikuti mphamvu yamagetsi yokhazikika siingayambitse kutsika kwa mphamvu yamagetsi pakadutsa nthawi yayitali chifukwa imatha kukweza mphamvu yamagetsi yoyendetsera kuti ibwezeretse kutsika kwa mphamvu yamagetsi. Pakadali pano, poyerekeza ndi mphamvu yamagetsi, mphamvu yamagetsi imasonyeza ubale wolunjika ndi zinthu zomwe zimapangitsa kuti magetsi aziyenda bwino komanso kuti zinthu ziyende bwino.

Chotumizira Mlingo Wothira Madzi Choteteza Mphezi, 4~20mA cha waya ziwiri

Mosiyana ndi sikelo ina yamagetsi yamagetsi (0~10mA, 0~20mA etc.), chinthu chachikulu cha 4~20mA ndichakuti sichisankha 0mA ngati malire otsika oyezera. Chifukwa chokwezera sikelo ya zero kukhala yamoyo ndikuthana ndi vuto la dead zero zomwe zikutanthauza kuti kulephera kuzindikira vuto la dongosolo kumabweretsa kulephera kwa 0mA komwe sikungasiyanitsidwe ngati sikelo yamagetsi ... 

Chopatsira Chosiyanitsa cha 4 ~ 20mA, zero yamoyo 4mA

Kuphatikiza apo, malire otsika a 4mA amatsimikizira kuti mphamvu zomwe zimagwiritsidwa ntchito sizimachepa kuti chipangizocho chigwiritsidwe ntchito pomwe malire apamwamba a 20mA amachepetsa kuvulala komwe kungawononge thupi la munthu chifukwa cha chitetezo. Chiŵerengero cha 1:5 range ratio mogwirizana ndi njira yachikhalidwe yowongolera mpweya chimathandizira kuwerengera kosavuta komanso kapangidwe kabwino. Mawaya awiri oyendetsedwa ndi lupu ali ndi chitetezo champhamvu cha phokoso ndipo ndi osavuta kuyika.

Ubwino wonsewu mwachilengedwe umapangitsa 4-20mA kukhala imodzi mwa zida zogwiritsidwa ntchito kwambiri poyendetsa makina. Shanghai WangYuan ndi kampani yopanga zida zopitilira zaka 20. Timapereka zida zabwino kwambiri zokhala ndi 4-20mA kapena njira zina zotulutsira zomwe zasinthidwa kuti zigwiritsidwe ntchito.kupanikizika, mulingo, kutenthandikuyendaulamuliro.