4-20mA isingeniso sokuphumayo

Amamitha amaningi ezimboni akhetha ukusebenzisa i-current ukudlulisa amasignali, ngoba i-current ayizwani nomsindo.Iluphu yamanje engu-4 ~ 20mA ingu-4mA ukumela isignali enguziro, i-20mA imele isikali esigcwele sesignali, futhi isignali engaphansi kuka-4mA nangaphezulu kuka-20mA isetshenziselwa i-alamu yamaphutha ahlukahlukene.Ukukhishwa kwe-4-20MA kwemikhiqizo yensimbi ye-Lanrui kusebenza isignali engu-4-20MA ngaphandle kwemitha yamanzi, imitha yokugeleza okuncane kanye nemitha yokushisa.Umphumela wemitha yamanzi 4-20mA awusebenzi.Ngakho-ke, lapho kusetshenziswa i-4-20mA yemitha yamanzi enezintambo ezimbili, idivayisi ethola amasignali amanje kufanele isebenze. Uchungechunge Lomehluko Wesikhathi: Amamenyu we-M53-M58 asetshenziselwa ukulinganisa, ukusetha nokuqinisekisa okukhiphayo kwe-4-20MA.

1. Imitha yochungechunge lwe-Doppler : I-OUTPUT1 khetha i-4-20 mA.I-Flow 4mA isetha ukugeleza okusheshayo okungu-4 mA.I-Flow 20mA isethe ukugeleza okusheshayo kwe-20mA.Imitha yamanzi/Uchungechunge lokugeleza okuncane: Idijithi yokuqala yemenyu ye-CFU isethelwe ku-2 ukuze uvule okukhiphayo kwamanje.

Imenyu ye-FF isethwe u-20mA ukuze ihambisane nokugeleza okusheshayo;I-4mA ikhombisa ukuthi ithrafikhi esheshayo ingu-0 futhi ayikho imenyu ezosethwa.

2. Imitha yochungechunge lwesivinini sendawo: kumenyu engezansi Yokukhipha, khetha u-4-20 ma bese usetha ukugeleza okusheshayo okungu-4 mA no-20mA.

3. I-Flume ne-weirs thayipha uchungechunge lwesiteshi esivulekile: ngaphansi kwepharamitha yokugeleza Izilungiselelo, khetha u-4-20 mA ukuze usethe ukugeleza okusheshayo okungu-20mA no-0 ku-4 mA.Ayikho imenyu ezosethwa.