高精度數顯分貝儀噪音計 Sound level meter High precision digital sound metre decibel meter noise meter

技術參數:

傳感器 1/2英寸電容式麥克風
測量範圍 30~130dB
測量精度 ±1.5dB
頻率響應 31.5Hz~8.5KHz
頻率加權特性 A/C
AC\DC信號輸出
低電提示
超載提示
解析度 0.1dB
動態特性選擇 Fast/Slow
最大值鎖定

包裝規格

電源 9V電池
產品淨重 225g
產品尺寸 221*66*33mm
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貨號: LB01 分類: , 標籤:

描述

技術參數:

傳感器 1/2英寸電容式麥克風
測量範圍 30~130dB
測量精度 ±1.5dB
頻率響應 31.5Hz~8.5KHz
頻率加權特性 A/C
AC\DC信號輸出
低電提示
超載提示
解析度 0.1dB
動態特性選擇 Fast/Slow
最大值鎖定

包裝規格

電源 9V電池
產品淨重 225g
產品尺寸 221*66*33mm

Features:

 This unit was designed according to  the IEC651 TYPE & ANSIS1.4 TYPE2 for sound level meters
 Instantancous  sound measure function
 Measurement range:  30-130 decibel
 With two equivalent weighted  sound pressure levels A and C
 characteristic modes  Fast & Slow dynamic
 AC and DC signed output for   frequency analyzer level recorder, FFT analyzer, graphic recorder etc.

Specifications:  

Microphone  1/2 inch Electret Condenser
Measuring Leve  30~130 dBA   35~130 dBC
 Accuracy  ±1.5dB
 Frequency Range  31.5Hz~8.5KHz
 Standard According to  IEC651 TYPE 2 & ANSIS1.4 TYPE 2
 Frequency Weighting  A & C
 Level Range Bar Graph  √
 Range Selection  4 modes
 Range Over Indication  √
 Battery Indication  √
 Backlight Displa  √
 Max & Min Hold Function  √
 Digit & Resolution  5 digits & 0.1dB Display: 0.5 secretary
 Bar graph:  50 dB scale at 1 dB step fro monitoring
 Level ranges:  30-80dB; 50-100dB; 60-110 dB; 80-130dB
 Over indicate over range:  Under indicate less than lower limit for the range
 AC output:  0.707 Vrms at FS output impendance approx 600 ohm
 DC output:  10mV / dB output impedance approx 100 ohm
 Time Weighting  Fast / Slow
 Max: Maximum hold  √
 Auto Power Off  √
 External power supply  √
 Sampling Frequency  2 times / sec
 Self calibration time:  10 secs(every turn on)
 Operating condition  Temperature :0-40℃ ; Humidity: 10% to 80%RH
 Storage Condition  Temperature: -10 to 60℃ ; Humidity: 10% to 70% RH

Diagram and LCD Description:

 1. Electret Condenser Microphone
2. LCD Display
3. Power Switch
4. Level range control switch: 30dB~80dB  50dB~100dB  60dB~110dB  80dB~130dB
5. Maximum value hold swithc. (MAX)
6. Frequency weighting select switch
A: A weighting for general sound level measurements.
C; C-weighting for checking the low frequency content of noise
7. Time weighting select switch
Fast: For normal measurements
Slow: For checking average level of fluctuating noise
8. AC output terminal: 0.707 Vrms
Corresponding to each range step.
9. DC output terminal: output 10mV / dB
10. Calibration control
11. External DC 60V power supply terminal
12. Battery Door
13. Tripod mounting screw
14. Windscreen
 LCD Display:
1. Level range
2. Instantanceous sound pressure level
3. Low battery mark.
4. Maximum value is held during measuring
5. Measure Value
6. Measure 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

Calibration Procedures:

Pls use a Standard Acoustic Calibrator

 1. Make the setting: Display: SPL(dBA) Time/Weighting: Fast/Level range: 60~110dB /Measurement mode: MAX function disable
 2. Insert the microphone carefully into to the 1/2 inch hole of the Calibration
 3. Turn on the Calibrator and adjust the Protentiom eter in side the battery compartment of the unit (shown in the diagram  1), The level of the  units ( show 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 )

Operation guide:

 1. Turn on power ( pls install battery first before power on)
 2. Select the desired response and weighting, also select desired rang.
 3. If weighting for general mosie sound level, pls 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 instrment captures and hold the maximum noise level.