31.5Hz - 8.5KHz Portable Decibel Meter , Digital Noise Meter with Response

31.5Hz - 8.5KHz Portable Decibel Meter , Digital Noise Meter with Response

Quik details 

Measuring Level : 30~130dBA , 35~130dBC

Power : Electronic

Usage :sound test 

Resolution : 0.1dB

Accuracy : ±1.5 dB

Frequency Range : 31.5 Hz to 8.5k Kz

Linearity Range : 50dB

Description 

The method of usage

   1.  Remove the battery cover on the back and put in four 1.5V 7＃  battery.

       Close the battery cover.

   2.  Press the power switch(ON/OFF), into the automatic measuring state, liquid

       crystal  display F (fast response), instrument according to the sound level

       automatic changing the measurement range, the range of liquid crystal at the

       top of the indicator will change along with the gear change. Analog and digital

       indicating measurements to the live sound size. If the liquid crystal display "UNDER"

       or "OVER" symbol, show that the voice is lower than 30dB or higher than the amount

       of 130dB.

   3.  Press the F/S key, convertible sound level meter response speed, F, S . Press the

       MAX key, can display the maximum sound level since boot. Press the HOLD key to

       keepthe measurement of sound level number. Press the LIGHT key,Light / out

       backgroundlight, background light 15 seconds will be automatically extinguished.

   4.   The key to open in the boot state press the power (ON/OFF), the instrument will

        immediately shut down.

   5.   Automatic shutdown: when 15 minutes to stop button, the instrument will

        automatically shut down, to save power.

   6 .   Continuous working mode: when the need for continuous measurement, first press

        the MAX key before the start, at the same time, press ON/OFF, the display flashes

        "COU" symbol, this boot will work continuously, will not automatically shut down.

   7．  Low power indication: when the battery voltage is reduced to a certain degree, the

       screen lit battery symbol, that the battery should be replaced.

Specifications

Application 

This device is a portable, easy to use and handy instrument for sound quality control in office, home, school, traffic, audio system and construction site. The meter has wide range of applications such as noise pollution studies, research and other industrial use.

Products Pictures