Amamitha amaningi ezimboni akhetha ukusebenzisa ugesi ukudlulisa izimpawu, ngoba ugesi awuzweli umsindo. Iluphu yamanje engu-4 ~ 20mA ingu-4mA ukumela isignali engu-zero, engu-20mA ukumela isikali esiphelele sesignali, kanti isignali engaphansi kuka-4mA nangaphezulu kuka-20mA isetshenziselwa i-alamu yamaphutha ahlukahlukene. Umkhiqizo we-4-20MA wemikhiqizo yezinsimbi ze-Lanrui uyisignali esebenzayo ye-4-20MA ngaphandle kwemitha yamanzi, imitha yokugeleza encane kanye nemitha yokushisa. Umkhiqizo wemitha yamanzi engu-4-20mA awusebenzi. Ngakho-ke, lapho kusetshenziswa umkhiqizo we-4-20mA wemitha yamanzi enezintambo ezimbili, idivayisi ethola izimpawu zamanje kumele isebenze. Uchungechunge Lomehluko Wesikhathi: Amamenyu e-M53-M58 asetshenziselwa ukulinganisa, ukusetha nokuqinisekisa umkhiqizo we-4-20MA.
1. Imitha yochungechunge lwe-Doppler: OUTPUT1 khetha u-4-20 mA. Ukugeleza okungu-4mA setha ukugeleza okusheshayo okungu-4 mA. Ukugeleza okungu-20mA setha ukugeleza okusheshayo okungu-20mA. Imitha yamanzi/Uchungechunge lokugeleza okuncane: Idijithi yokuqala yemenyu ye-CFU isethwe ku-2 ukuvula ukuphuma kwamanje.
Imenyu ye-FF isethwe ngo-20mA ukuze ihambisane nokugeleza okusheshayo; i-4mA ikhombisa ukuthi ithrafikhi esheshayo ingu-0 futhi ayikho imenyu okufanele isethwe.
2. Imitha yochungechunge lwejubane lendawo: kumenyu engezansi yokukhipha, khetha u-4-20 ma bese usetha ukugeleza okusheshayo kuka-4 mA no-20mA.
3. Uchungechunge lweziteshi ezivulekile zohlobo lwe-Flume kanye ne-weirs: ngaphansi kwezilungiselelo zepharamitha yokugeleza, khetha u-4-20 mA ukuze usethe ukugeleza okusheshayo okungu-20mA kanye no-0 ku-4 mA. Ayikho imenyu okufanele isethwe.
Isikhathi sokuthunyelwe: Agasti-29-2022