Feature:
This unit was designed according to the IEC651, TYPE2&ANSI S1.4 TYPE for sound level meters
Instantaneous sound measure function
Measurement range: 30-130 decibel
With two equivalent weighted sound pressure levels A and C
Fast & Slow dynamic characteristic modes
AC and DC signed oytput for frequency analyzer level recorder, FFT analyzer, graphic recorder, etc.

Specifications:
Frequency range: 31.5Hz-8.5kHz
Linearity range: 50db
Measuring level: 30-130dBA 35-130dBC
Frequency weighting: A, C
Digital display: 5 digits
Resolution: 0.1dB
Display: 0.5 secretary
Bargraph: 50dB scale at 1dB step for mornitoring current sound pressure level
Display period: 50ms
Level ranges: 30-80dB; 50-100dB; 60-110dB; 80-130dB
AC output: 0.707 Vrms at FS output impendance approx 600Ω
DC output: 10mV/dB output impedance approx 100Ω
Time weighting: Fast/Slow
Microphone: 1/2 inch Electret Condenser microphone
Selfcalibration time: 10 sec(every turn on)