Mai mulkin murabba'in dutse

Murabba'in granite yana aiki a matsayin babban ma'aunin tunani na lissafi, tare da babban aikace-aikacensa na metrology shine kimantawa daidai na jurewar lissafi guda uku masu mahimmanci:
1. Kimantawa ta dindindin: Kimantawa ta adadi na karkacewar kusurwa tsakanin axis na sandar kayan aikin injin, alkiblar motsi na zamewa, da kuma matakin tunani na teburin aiki - yawanci ana yin sa ne bisa ga ISO 1101 kuma an tabbatar da shi ta hanyar daidaitawa ta gani ko binciken alamar dial;
2. Duba layi-layi: Tantance kuskuren layi-layi tsakanin saman biyu masu layi-layi ɗaya (misali, fuskokin layin jagora ko fasalin kayan aiki masu adawa), ta amfani da layukan murabba'i masu adawa da juna a matsayin ma'aunin bayanai da za a iya gano su;
3. Daidaita lanƙwasa: Amfani da saman granite mai kauri wanda aka gama da haske, wanda aka daidaita da zafi - kamar yadda aka tabbatar da lanƙwasa ≤0.5 μm sama da 100 mm (kowace JJG 700–2018) - azaman babban matakin ma'auni don auna lanƙwasa ta hanyar amfani da stylus profilometry ko hanyoyin interferometric.