Brief introduction: ND10 sound level tester is a pocket-sized acoustic measurement instrument, used for environmental noise, machine noise, vehicle noise, motor noise and other measurements, but also for architectural acoustics, electroacoustics and other measurements. Tester to "maintain" function can keep measurements in electrical instrument performance in line with the international electrotechnical commission (IEC) in sound level meter standards, 651 as a general purpose type Ⅱ sound level meter, also accord with the requirement of GB3785 standard. ND10 type sound level tester has stable performance, simple operation, low price and easy to carry. Main technical indicators and functions: 1. Measurement range :(2 * 10-5pa for reference) 1) A sound level: 40dB ~ 130dB; 2) C sound level: 55dB ~ 130dB. 2. Frequency range: 31.5Hz ~ 8kHz; 3, frequency meter weight: A, C frequency meter weight network; 4. Grading error of range attenuator: less than or equal to 0.5db; 5. Meter calibration: 0dB+10dB: error less than or equal to 0.5db -5dB ~ 0dB, error less than or equal to 1dB; 6. Amplifier output: 2V effective value of output voltage (when the meter is full of this degree); 7, the output impedance: about 600 Ω; 8, minimum load impedance: 10 k Ω; 9. Detection characteristics: approximate effective values; 10. Time weight: "F fast" and "S slow"; 11. Maintenance features: attenuation is no more than 2dB per minute; 12. Polarization voltage: 28V; 13. Correction: sound level correction; Electrical correction; 14, the conditions of use: work temperature: - 10 ℃ ~ + 50 ℃; 15, relative humidity: no more than 80% (+ 40 ℃); 16. Power supply: one section of 9V battery.
Brief introduction: ND10 sound level tester is a pocket-sized acoustic measurement instrument, used for environmental noise, machine noise, vehicle noise, motor noise and other measurements, but also for architectural acoustics, electroacoustics and other measurements. Tester to "maintain" function can keep measurements in electrical instrument performance in line with the international electrotechnical commission (IEC) in sound level meter standards, 651 as a general purpose type Ⅱ sound level meter, also accord with the requirement of GB3785 standard. ND10 type sound level tester has stable performance, simple operation, low price and easy to carry.
