This unit is specifically designed for accurately measuring noise levels in various environments, making it useful for noise engineers, noise quality control, and health prevention. It can be used in factories, offices, traffic roads, households, and other noise measurement applications.

FEATURE

• This unit was designed according to following standards:
•            a. International electrician committee standard: IEC PUB 651 TYPE2
•            b. US national standard: ANSI S1.4 TYPE2
• Accuracy up to +/-1.5dB
• Measurement range is 30 to 130dB
• Fast/Slow Time weighting selection
• Automatic backlight
• The maximum value holding function
• Auto power off 10 minutes
• A/C Frequency weighting selection
• Both AC and PWM signal output are available
• Calendar function
• 4700 data record function
• Connect with the PC through USB, provides data record downloading,
• real-time data sampling analysis, and printing graph & data functions.

SPECIFICATION

• Calibration sound source: 94dB@1KHz
• Measurement range:30~130dBA、35~130dBC
• Accuracy:±1.5dB（reference sound pressure standard，94dB@1KHz）
• Frequency response:31.5Hz~8.5KHz
• Resolution:0.1dB
• Measuring level:30 to 80 , 50 to 100, 60 to 110,
•                             80 to 130, 30 to 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 : FAST:8times/second;
•                          SLOW:2times/second
• AC signal output: 4Vrms/ full bar graph, output impedance is about 600 ohm
• PWM signal output: Duty cycle =0.01X db value/3.3 x 100%
• Dynamic characteristic: FAST(high speed)/SLOW(low speed)
• Calendar accuracy: ±30seconds/day
• Data storage quantity: 4700
• The maximum value holding: MAX
• Auto power off: 10 minutes without operation
• Micro phone: 1/2inch polarization capacitance microphone
• Power supply: 6V (4PCS 1.5V Alkline battery)
• Battery life: 20h continuous use(Alkaline batteries)

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