It's a hand-hold, pocket vibration meter,used for measuring bibration acceleration,speed and displacement of ... Vibrometer VC63Basic functionMeasuring range Vibration displacement (P-P)0~1999μm Vibration speed (RMS)0~199.9mm/s Vibration acceleration (O-P ... (P-P)0~20μm,≤±10%≥20μm,≤±5% Vibration speed (RMS)0~2.0mm/s,≤±10%>2.0mm/ ... s,≤±5% Vibration acceleration (O-P)0~2.0m/s,≤±10%>2.0m ...