... 61672-1:2002 Class 2 2.Frequency Range:20Hz~12.5KHz 3.Wide dynamic range 4.Small and light ... ZTimeWeightingF, SF, S, IF, S, I, PeakFrequency Range20 Hz ~ 12.5 kHzMeas. Upper Range>130 dBSelf—generated Noise< 30 dBA ... m, 1 h, 2 h, 4 h, 8 h, 12 h, 16 h,24h Manual, 10 s, 1 m, ... m, 1 h, 2 h, 4 h, 8 h, 12 h, 16 h, 24 h1 s ~ 24 hRS232 Interface NO ... 50°C—10°C~ 50°C Integrating Sound Level Meter AWA 5636 Class 2