Yuav Ua Li Cas Calibrate Noise Level meter, pls nyeem hauv qab no: Cov txheej txheem Calibration Thov siv Standard Acoustic Calibrator.1.Ua cov chaw hauv qab no: Zaub: SPL (dBA) Time2.Insert lub microphone kom zoo zoo rau hauv 1/2 nti qhov ntawm lub Calibrator. 3.Tig rau lub Calibrator thiab kho lub Protentiometer nyob rau sab ntawm lub roj teeb compartment theem ntawm chav tsev (pom nyob rau hauv daim duab 1).Lub theem zaub yuav qhia qhov xav tau Level (94.0).Peb cov khoom yog tag nrho cov zoo. calibrated ua ntej Shipment.Recommen
