Jiajia hnyav lub peev xwm lub cev hnyav yog tsim los xyuas kom muaj kev nyab xeeb thiab ua haujlwm tau zoo, ua rau lawv txoj kev daws teeb meem zoo tshaj plaws rau cov txheej txheem calibration dua. Cov luj yog tsim nyob rau hauv raws li OIML-R111 cov qauv rau cov khoom siv, qhov chaw saum npoo, ntom, thiab hlau nplaum, cov luj no yog qhov kev xaiv zoo tshaj plaws rau cov qauv ntsuas ntsuas thiab National Institutes.