Yiliphi iphutha elivumelekile ngokunemba kwesikali sokulinganisa?

Ukuhlukaniswa kwamazinga okunemba kwezikali zokulinganisa
Ukuhlukaniswa kwezinga lokunemba kwezikali zokulinganisa kunqunywa ngokusekelwe ezingeni lazo lokunemba. EShayina, izinga lokunemba kwezikali zokulinganisa livame ukuhlukaniswa libe amazinga amabili: izinga lokunemba eliphakathi (izinga le-III) kanye nezinga lokunemba elijwayelekile (izinga le-IV). Okulandelayo ulwazi oluningiliziwe mayelana nokuhlukaniswa kwamazinga okunemba kwezikali zokulinganisa:
1. Izinga lokunemba eliphakathi nendawo (Izinga lesi-3): Leli yizinga lokunemba elivame kakhulu lezikali zokulinganisa. Kuleli zinga, inombolo yokuhlukanisa u-n yesikali sokulinganisa ivame ukuba phakathi kuka-2000 no-10000. Lokhu kusho ukuthi isisindo esincane esingahlukaniswa isikali sokulinganisa singu-1/2000 kuya ku-1/10000 somthamo waso omkhulu wokulinganisa. Isibonelo, isikali sokulinganisa esinomthamo omkhulu wokulinganisa wamathani ayi-100 singaba nesisindo esincane sokuxazulula esingamakhilogremu angu-50 kuya ku-100.
2. Izinga lokunemba elijwayelekile (izinga le-IV): Leli zinga lesikali sokukala livame ukusetshenziselwa izinjongo zezentengiselwano futhi alidingi ukunemba okuphezulu njengezinga lokunemba eliphakathi. Kuleli zinga, inombolo yokuhlukanisa u-n yesikali sokukala ivame ukuba phakathi kuka-1000 no-2000. Lokhu kusho ukuthi isisindo esincane esingahlukaniswa isikali sokukala singu-1/1000 kuya ku-1/2000 womthamo waso omkhulu wokukala.
Ukuhlukaniswa kwamazinga okunemba ezikalini zokulinganisa kubalulekile ukuqinisekisa ukunemba kwawo ezimweni ezahlukene zokusetshenziswa. Lapho bekhetha isikali sokulinganisa, abasebenzisi kufanele bakhethe izinga lokunemba elifanele ngokusekelwe ezidingweni zabo zangempela.
Uhla oluvunyelwe lukazwelonke lwamaphutha ezikalini zokulinganisa
Njengethuluzi elibalulekile lokulinganisa, ibhuloho lokulinganisa lidlala indima ebalulekile ekukhiqizweni kwezimboni kanye nokuhweba kwezentengiselwano. Ukuze kuqinisekiswe ukunemba kwemiphumela yokulinganisa, izwe limise imithetho ecacile mayelana nohlu lwamaphutha avumelekile ezikalini zokulinganisa. Okulandelayo ulwazi olufanele mayelana nephutha elivumelekile lezikali zokulinganisa ngokusekelwe emiphumeleni yokusesha yakamuva.
Amaphutha avumelekile ngokwemithethonqubo kazwelonke ye-metrological
Ngokwemithethonqubo kazwelonke ye-metrological, izinga lokunemba kwezikali zokulinganisa lisezingeni lesithathu, kanti iphutha elijwayelekile kufanele libe ngaphakathi kuka-± 3 ‰, okubhekwa njengokujwayelekile. Lokhu kusho ukuthi uma umthamo omkhulu wokulinganisa wesikali sokulinganisa ungamathani ayi-100, iphutha elikhulu elivumelekile ekusetshenzisweni okuvamile lingu-± 300 kilograms (okungukuthi ± 0.3%).
Izindlela zokusingatha amaphutha esikali sokukala
Uma usebenzisa isikali sokukala, kungase kube namaphutha ahlelekile, amaphutha angahleliwe, kanye namaphutha amakhulu. Iphutha elihlelekile livela kakhulu ephutheni lesisindo eliqukethwe esikalini sokukala ngokwalo, futhi iphutha elingahleliwe lingase libangelwe ukwanda kwephutha elibangelwa ukusebenza kwesikhathi eside. Izindlela zokusingatha la maphutha zifaka phakathi ukususa noma ukunxephezela amaphutha ahlelekile, kanye nokunciphisa noma ukususa amaphutha angahleliwe ngokusebenzisa izilinganiso eziningi kanye nokucubungula izibalo.
Amanothi avuliwe
Uma usebenzisa isikali sokukala, kubalulekile ukugwema ukulayisha ngokweqile ukuze uvimbele umonakalo ku-sensor futhi kuthinte ukunemba kwesisindo. Ngesikhathi esifanayo, izinto akufanele ziphonswe ngqo phansi noma ziwele phansi zisuka endaweni ephakeme, njengoba lokhu kungalimaza izinzwa zesikali. Ngaphezu kwalokho, isikali sokukala akufanele sinyakaziswe kakhulu ngesikhathi sokusetshenziswa, ngaphandle kwalokho kuzothinta ukunemba kwedatha yokukala futhi kungathinta impilo yayo yokusebenza.
Ngamafuphi, ububanzi bamaphutha avumelekile esikalini sokulinganisa bunqunywa ngokusekelwe emithethweni kazwelonke ye-metrological kanye nemininingwane yesikali sokulinganisa. Lapho bekhetha futhi besebenzisa isikali sokulinganisa, abasebenzisi kufanele basihlole ngokusekelwe ezidingweni zabo kanye nezidingo zokunemba, futhi banake ukusebenza okulungile ukuze banciphise amaphutha.