Digital sound level meter

Basic function

Measure Range              30～130dBA  35～130dBC   
Accuracy                       ±1.5dB   
Frequency Range           31.5HZ-8.5KHZ   
Linearity Range              50dB   
Digit & Resolution          5Digits & 0.1dB   
Sampling Frequency       2 times/sec

Express function

AC/DC Output                               √      
Auto Power Shut Off                    √
Low Battery Indication                   √
Over Range Indication               √
Microphone                           1/2 Inch Electret Condenser Microphone   
Time Weighting Selection        Fast/Slow  
Frequency Weighting              A & C  
Max Hold Function                    √

General Features

Standard Accessory       RS232 caliber ×1pcs ， Drive CD ×1pcs ( only for 834) User's Manual×1pcs 、Gift box 
Battery Type                 6×1.5v AA  (Alkaline or DC Adapter) 
Dimension                    300g
MOQ                          20pcs  
Ctn Size                      62.5×45.0×28.5cm  
Q'TY / Ctn                 20pcs  
GW/TW                    19 kg/18 kg  

Digital sound level meter

B Features:

 

   1）This unit was designed according to the IEC651 TYPE2& ANSI S1.4 TYPE2 for sound level meters.

   2）Instantaneous sound measure function.

   3）Measurement range: 30-130 decibel

   4）With two equivalent weighted sound pressure levels,          A and C.

   5）Fast & Slow dynamic characteristic modes.

   6）AC and DC signed output for frequency analyzer level recorder, FFT analyzer, graphic recorder etc.

C Specifications:

   1）Accuracy: ±1.5 dB (under reference conditions)

   2）Frequency range: 31.5 Hz~ 8.5K Hz

   3）Linearity range: 50 dB

   4）Measuring level: 30~130 dBA, 30~130 dBC

   5）Frequency weighting: A, C

   6）Digital display:  5 digits

         Resolution：0.1dB

         Display：0.5 secretary

   7）Bar graph: 50 dB scale at 1 dB step for monitoring current sound pressure level display period: 50 mS

   8）evel ranges：30-80 dB； 50-100 dB；60-110 dB； 80-130 dB；

   9）Over indicate over range:Under indicate less than lower limit of the range.

10）AC output: 0.707 Vrms at FS output impendance approx 600Ω

11）DC output: 10 mV / dB output impedance approx 100Ω

12）Time weighting: Fast / Slow

13）Microphone: 1/2 inch Electret Condenser microphone

14）Max: Maximum hold

15）Power supply: 1*9V alkaline cells or DC 9V adapter Power life: About 30 hrs (calkaline cells)

16）Self calibration time: 10 sec (every turn on)

17）Operating Temperature: 0℃ to 40℃

18）Storage Temperature: -10℃ to 60℃

Storage Humidity:10% to 70%RH

19)Dimensions:

20)Weight:   g(including battery)

D Calibration Procedures:

Please use a Standard Acoustic Calibrator.

 

1）  Make the following settings:

Display: SPL (dBA) Time

weighting: FAST

Level range: 60 to 110 dB

Measurement mode: MAX function disable

2）Insert the microphone carefully into the 1/2  inch hole of the Calibrator.

3) Turn on the Calibrator and adjust the Prote-ntiometer in back top of the unit (shown in the diagram 1 ). The level of the unit (shown in the diagram 1) The level display will indicate the desired Level (94.0).

Our products are all well calibrated before Shipment.Recommended recalibration cycle: 1 year.

 

E Name and Functions:

1）Windscreen.

2）Electret Condenser Microphone.

3)  LCD Display.

4）Power switch

5）Maximum value hold switch. (MAX)

6）Level range control switch:

30dB~80dB；     50dB~100dB；

60dB~110dB；   80dB~130 dB

7）Time weighting select switch.

Fast: For normal measurements.

Slow: For checking average level of fluctuating noise.

8）Frequency weighting select switch.

A: A weighting for general sound level measurements.

C: C- weighting for checking the low frequency content of noise.

9）Back Light Button Switch

10）External DC 9V power supply terminal.

11）AC output terminal: 0.707 Vrms Corresponding to each range step.

12）DC out put terminal: output 10 mV/ dB

13）Tripod mounting screw

14）Calibration control

15）Battery Door.

   1）Level range.

   2）Instantaneous sound pressure level.

   3）Low battery mark.

   4）Maximum value is held during measuring.

   5）Measuring value.

   6）Measurement Unit.

   7）Frequency weighting A/C.

   8）Level range Bar graph.

   9）Rang over.

10）Slow time weighting.

11）Fast time weighting.

12）Range under.

   1）Open battery door and install four 9V battery in the battery compartment.

   2）Install battery door.

   3）When the battery voltage drops below the operating Voltage, mark appears . Please replaced with new one.

   4）When the DC adapter is used, insert the plugs (3.5φ) of the adapter into the DC 9V connector on the side panel.

H Operation direction:

1）Turn on power

2）Select the desired response and weighting, also select desired rang.

   3）If weighting for general noise sound level, please select dBA.

4）If the sound source consists of the short brusts of only catching sound peak, set response to FAST. to measuring average sound level, use the slow setting.

   5）When MAX mode is chosen.The instrument captures and hold the maximum noise level.

I Cautions

   1）Do not operate the unit at high temperature and Humidity environment.

2）Please take out battery from unit if not in use for any extended period of time.

3）Once using the unit in the presence of wind, it is a must to mount the windscreen to not pick up undesired signals.

   4）Operating Environmental conditon:

      Humidity≤80%RH,

      Temperature from 0℃ to 40℃.