Maxay warshaduhu u isticmaalaan calaamadaha 4-20mA halkii ay ka isticmaali lahaayeen calaamadaha 0-20mA?

Calaamadaha korantada ee analoogga caadiga ah ee inta badan loo isticmaalo warshadaha waa in la isticmaalo 4-20mA DC hadda si loo gudbiyo analoogga.Sababta loo isticmaalo calaamadda hadda jirta ayaa ah in aanay sahlanayn in la farageliyo, iska caabbinta gudaha ee isha hadda jirtana waa mid aan dhammaad lahayn, iska caabinta siligga si taxane ah oo wareeggu ma saamaynayso saxnaanta, waxaanay gudbin kartaa boqollaal. oo mitir ah oo ku yaal siliga caadiga ah ee maroojin.Xadka sare waa 20mA sababta oo ah shuruuda aan qarxin: tamarta dhimbiyeedka ee ay sababtay off-ka hadda 20mA kuma filna in ay shido gaaska.Sababta xadka hoose aan loogu dhigin 0mA waa in la ogaado kala go'a: kama yaraan doono 4mA inta lagu jiro hawlgalka caadiga ah.Marka khadka gudbinta uu jabo cilad darteed, loop-ka hadda wuxuu ku dhacayaa 0, iyo 2mA waxaa badanaa loo isticmaalaa qiimaha alaarmiga goynta.