Imigangatho ephezulu evumelekileyo yeempazamo (MPE) zeemitha zamanzi zoomatshini ihlelwa ngokweenkcukacha zobugcisa zamazwe ngamazwe/zengingqi (umz., ISO 4064, OIML R49) kunye neeklasi zokuchaneka kwemitha, apho ulwahlulo luxhomekeke ikakhulu kumanqanaba okuhamba kwamanzi kunye neentlobo zemitha (uhlobo lwevolumu okanye lwe-turbine).
Uhlu lwempazamo enkulu evumelekileyo (i-MPE) kwiimitha zamanzi ezisebenzisa umatshini luhambelana nemigangatho eyaziwayo kwihlabathi liphela efana ne-ISO 4064 (i-International Organisation for Standardization) kunye ne-OIML R49 (i-International Organisation of Legal Metrology). Imigaqo ephambili yohlu lwezi zinto zilandelayo:
- Inkcazo yeKlasi yokuChaneka: Iimitha zamanzi ezisebenzisa oomatshini zahlulwe ngokweeklasi zokuchaneka (umz., iKlasi yoku-1, iKlasi yesi-2 ngokwe-ISO 4064-1) ngokusekelwe ekusebenzeni kwazo kokulinganisa. Iklasi nganye ichaza imida ye-MPE eyimfuneko kuzo zonke izikhewu ezahlukeneyo zokuhamba kwamanzi.
- Ulwahlulo lweXesha lokuHamba koMbane: Uluhlu lokuhamba kombane olusebenzayo lwemitha yamanzi lwahlulwe lwaba zizithuba ezibini ezibalulekileyo: “uluhlu lokuhamba kombane oluphantsi” (ukusuka kwisantya esincinci sokuhamba kombane Q₃ ukuya kwisantya sokuhamba sotshintsho Q₂) kunye “noluhlu lokuhamba kombane oluphezulu” (ukusuka kwi-Q₂ ukuya kwisantya sokuhamba kombane esigqithisileyo Q₄).
- Inkcazo yoMda we-MPE: Kwimitha yeKlasi yoku-1, i-MPE i-±5% ngaphakathi koluhlu lokuhamba okuphantsi kunye ne-±2% ngaphakathi koluhlu lokuhamba okuphezulu. Kwimitha yeKlasi yesi-2, i-MPE i-±3% kuluhlu lokuhamba okuphantsi kunye ne-±2% kuluhlu lokuhamba okuphezulu. Le mida iqinisekisa ukuthembeka kokulinganisa okuzinzileyo kwiimeko zokusetyenziswa okwenyani.
- Iimfuno Ezikhethekileyo Zeemitha Ezincinci Zobubanzi: Kwiimitha zamanzi zasekhaya ezinobukhulu obuncinci (umz., ububanzi obuqhelekileyo ≤15 mm), amalungiselelo ongezelelweyo angasebenza kwimpazamo ethi "isantya sokuhamba esincinci (Q₃)" ukuqinisekisa ukulinganiswa ngokuchanekileyo kweemeko zokuhamba okuphantsi okanye ukuvuza kwamanzi.
Zonke iindidi zenzelwe ukuhambelana neepateni zokusetyenziswa kwamanzi ezisebenzayo, ukulinganisela ukuchaneka kokulinganisa kunye nokusebenza okunokwenzeka kwimetrology esemthethweni kunye nokusetyenziswa kwezorhwebo.
Ixesha leposi: Novemba-18-2025