Introduction and Features ND10 -type sound level tester is a pocket for acoustic measurement instruments for environmental noise , machine noise , vehicle noise , electrical noise, measurements can also be used for architectural acoustics , electro-acoustic and other measurements. Instrument performance is stable , easy to use , inexpensive, and easy to carry . Technical indicators 1.Measuring range: ( in 2 × 10-5Pa as reference) 1) A sound level : 40dB ~ 130dB; 2) C Sound level : 55dB ~ 130dB. 2.Frequency range : 31.5Hz ~ 8kHz; 3 . Frequency weighting : A, C frequency weighting network ; 4 . Range attenuator sub-file error : ≤ 0.5dB; 5 . Meter scale : 0dB +10 dB: error ≤ 0.5dB-5dB ~ 0dB, error ≤ 1dB; 6 . Amplifier Output : Output voltage ( meter full the degrees ) 2V rms ; 7 . Output impedance: approximately 600Ω; 8 . Minimum load impedance : 10kΩ; 9 . Detector Features: Approximate RMS ; 10 . Time weighting : "F fast" and "S slow" ; 11 . Retention characteristics : attenuation per minute less than 2dB; 12 . Polarization voltage : 28V; 13 . Correction: sound level correction ; electrical calibration ; 14 . Conditions of Use: Operating temperature : -10 °C ~ +50 °C; 15 . Relative humidity : not more than 80% (+40 °C when ) ; 16 . Power supply : 9V battery 1 .
Introduction and Features ND10 -type sound level tester is a pocket for acoustic measurement instruments for environmental noise , machine noise , vehicle noise , electrical noise, measurements can also be used for architectural acoustics , electro-acoustic and other measurements. Instrument performance is stable , easy to use , inexpensive, and easy to carry .
