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Hong Kong Hima AR844 Digital Noise Meter
Hong Kong Hima AR844 Digital Noise Meter
Product details
A sound level meter, also known as a noise meter, is the most basic instrument in noise measurement. A sound level meter generally consists of a condenser microphone, preamplifier, attenuator, amplifier, frequency weighting network, and effective value indicator head. The working principle of a sound level meter is that the sound is converted into an electrical signal by a microphone, and then the impedance is transformed by a preamplifier to match the microphone with an attenuator. The amplifier adds the output signal to the weighting network, performs frequency weighting on the signal (or an external filter), and then amplifies the signal to a certain amplitude through an attenuator and amplifier. Finally, after processing by a digital circuit processor, the corresponding value is displayed on the LCD.
Technical Parameter
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sensor |
1/2Inch condenser microphone |
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measuring range |
30~130dBA 35~130dBC |
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Measurement accuracy |
±1.5dB |
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frequency response |
31.5HZ~8.5KHZ |
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frequency weighting |
A/C |
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data communication |
USB |
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data analysis |
Online/offline |
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Data Storage |
4700pen |
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AC\\DCsignal output |
Yes, there is |
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Low power warning |
Yes, there is |
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Overload warning |
Yes, there is |
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Number of digits andresolution |
4-digit&0.1dB |
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Time weighting |
Fast/Slow |
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Maximum value locking |
have |
Packaging specifications
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power supply |
4*1.5V AABattery（Equipped with an external power socket |
|
Net weight |
168g |
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Product size |
221*82*34mm |
|
Packaging method |
color box |
|
Standard outer box capacity |
12pcs |
|
Standard outer box size |
52*33.5*47cm |
|
Gross weight of standard outer box |
12.84kg |
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