Ko ngā paerewa hapa nui rawa e whakaaetia ana (MPE) mō ngā mita wai miihini ka whakarōpūtia i runga i ngā whakaritenga hangarau o te ao/rohe (hei tauira, ISO 4064, OIML R49) me ngā akomanga tika mita, me ngā wehenga i runga i ngā awhe tere rere me ngā momo mita (momo rōrahi, momo tāpine rānei).
Ko te whakarōpūtanga o te hapa nui e whakaaetia ana (MPE) mō ngā mita wai miihini e piri ana ki ngā paerewa e mōhiotia ana e te ao whānui pērā i te ISO 4064 (International Organization for Standardization) me te OIML R49 (International Organization of Legal Metrology). Ko ngā mātāpono matua o te whakarōpūtanga koia ēnei:
- Whakamāramatanga o te Akomanga Tika: Ka whakarōpūtia ngā mita wai miihini ki ngā akomanga tika (hei tauira, Akomanga 1, Akomanga 2 i runga i te ISO 4064-1) i runga i tā rātou mahi ine. Ka tohua e ia akomanga ngā herenga MPE ā-ture puta noa i ngā wā rere rerekē.
- Te Wehenga o te Wā Rere: E rua ngā wā matua e wehea ai te awhe rere o te mita wai: te "awhe rere iti" (mai i te tere rere iti rawa Q₃ ki te tere rere whakawhiti Q₂) me te "awhe rere teitei" (mai i te Q₂ ki te tere rere taumaha rawa Q₄).
- Whakatakotoranga Herenga MPE: Mō ngā mita Akomanga 1, ko te MPE kei roto i te awhe rere iti me te ±2% kei roto i te awhe rere teitei. Mō ngā mita Akomanga 2, ko te MPE kei roto i te awhe rere iti me te ±2% kei roto i te awhe rere teitei. Mā ēnei here ka whakarite kia rite te pono o te ine puta noa i ngā horopaki whakamahinga tūturu.
- Ngā Whakaritenga Motuhake mō ngā Mita Iti te Diameter: Mō ngā mita wai miihini iti te diameter o te whare (hei tauira, te diameter ingoa ≤15 mm), ka pā pea ētahi atu whakaritenga ki te hapa "tere rere iti rawa (Q₃)" hei whakarite i te ine tika o ngā āhuatanga rere iti, ngā āhuatanga maturuturu rānei.
Kua hangaia ngā whakarōpūtanga katoa kia rite ki ngā tauira whakamahinga wai mahi, kia taurite ai te tika o te ine me te whaihuatanga whakahaere mō te ine ture me te whakamahinga arumoni.
Wā tuku: Whiringa-ā-rangi 18-2025