"Isantya sokuhamba kwamanzi okuqala" (esibizwa ngokuba yi-Q₁ kwimigangatho ye-metrological) sichazwa njengesantya sokuhamba kwamanzi esincinci apho imitha yamanzi enokuqalisa ukujikeleza kwendlela yayo yokulinganisa yangaphakathi (umz., impeller) kwaye yenze umlinganiselo osebenzayo womthamo.
Iimfuno zobugcisa eziphambili zichazwe ngolu hlobo lulandelayo:
- Kwisantya sokuqala sokuhamba kwamanzi Q₁, impazamo yokulinganisa imitha kufuneka ihambelane nemida echazwe yiklasi yayo yokuchaneka (umz., ±5% kwiKlasi yoku-1 yeemitha kunye ±3% kwiKlasi yesi-2 yeemitha ngokwe-ISO 4064-1:2014).
- Imitha kufuneka ibonise ukuqalisa okunobuthathaka ngaphandle kokuxinana okanye i-hysteresis, ukuqinisekisa ukulinganiswa okuthembekileyo kweemeko zokuhamba kwamanzi eziphantsi kakhulu (ezifana namanzi athontsizayo) eziqhelekileyo kwiindawo zasekhaya okanye kwiindawo zorhwebo ezilula.
- Ixabiso lokuqala lokuhamba kwamanzi limiselwa ngovavanyo oluqhelekileyo, olufuna ukuba imitha ibhalise umthamo oqokelelweyo rhoqo xa amanzi ehamba kwi-Q₁, ngaphandle kokulibaziseka okukhulu okanye ukusilela ekuqaliseni ukulinganisa.
Ezi mfuno zibalulekile ekuthinteleni ukusetyenziswa kwamanzi okungabhalwanga phantsi nasekuqinisekiseni ukuba imitha iyahambelana nemigaqo yemetrology esemthethweni.
Ixesha leposi: Novemba-18-2025