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According IEC651 TYPE2 & ANSI S1.4 TYPE2
Calibration sound source 94dB at 1KHz
Measurement range 30~130dBA, 35~130dBC
Accuracy +/- 1.5dB(reference sound pressure standard,94dB at 1KHz)
Frequency response 31.5Hz~8.5KHz
Resolution 0.1dB
Measuring level 30~130,30~80,50~100,60~110,80~130
Dynamic range 50dB/100dB
Overload indication OVER/UNDER
Frequency weighting characteristic A and C
Digital display 4 digits
Analogy bar graph 1dB/1 bar graph
Sampling rate 20times/second
AC signal output 4Vrms/full bar graph,output impedance is about 600 ohm
PWM signal output Duty cycle=(0.01xdb value)/3.3*100%
Dynamic characteristic Fast(High speed)/Slow(Low speed)
Calendar accuracy +/-30 seconds/day
Data storage quantity 4700
The maximum value holding MAX
Auto power off 10minutes without operation
Microphone 1/2 inch condenser microphone
Power supply 6V(4pcs 1.5V alkline battery)
Dimension 70*35*256mm
Unit Weight 244g(without battery)
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