DSL-331 Sound Level meter Data logger USB Recorder Product ID: DSL-331

The model  DSL-331  digital meter  is manufactured by Tecpel, and is a programmable sound level data logger equipped with back screw hole tripod connection. It has frequency range from 31.5 Hz up to 8 KHz, voltage supply of 9 V DC measuring level range from 30 to 130dB and operating temperature of 40 ºC. This is used in applications such as monitoring of safe working conditions, activity detection and recording, long-term measurement and recording of acoustic levels for environmental impact studies.



Model:DSL-331
1.Auto Ranging Measurement 30dB to 130dB
2.Work with Window Software
3.32,000 Records Data Logger
4.Bar graph Indication with Back Light
5.USB cable available for optional purchase.

Certificate:CE
  • DSL 331 SPECIFICATIONS
    • Standard Applied: IEC651 Type 2, ANSI S1.4 Type 2
    • Frequency Range 31.5Hz ~ 8KHz
    • Measuring Level Range : 30 ~ 130dB
    • Frequency Weighting A/C
    • Microphone 1/2 inch electric condenser microphone Display
    • LCD Back Light Function
    • Digital Display 4 digits ,
    • Resolution: 0.1dB,
    • Display Update: 0.5 sec
    • Analog Display 50 segment Bar graph, Resolution,
    • Resolution: 1dB,
    • Display update: 50mS
    • Time Weighting FAST (125mS); SLOW(1 Sec)
    • LEVEL Range : Lo: 30 ~ 80dB ; Med: 50~ 100dB, Hi: 80~ 130dB; Auto Range : 30~ 130 dB
    • Accuracy: ±1.5dB (under reference condition at 94dB 1KHz)
    • Measuring Level Range : 30 ~ 130dB
    • Dynamic Range 100 dB
    • Over and Under range Indication Function 'OVER' is displayed, while input is more than upper limit of range. ; ' UNDER' is displayed, while input is less than lower limit of range.
    • MAX/MIN Hold
    • Hold Reading the Maximum and Minimum Value
    • AC Output 1V rms at FS (Full Scale), output impedance : Approx. 100 Ω
    • DC Output 10mV/dB, Output impedance approx. 1K Ω
    • Auto Power Off 30 minutes if no operation
    • GENERAL
    • Power Requirement: One piece 9V battery NEDA 1604
    • Power Life About 50 Hours (Alkaline battery)
    • AC Adapter (option)
    • Voltage 9VDC (8~ 15 V DC Max) ; Supply current : > 30mADC
    • Operation Temperature: 0 to 40 ºC (32 to 104 ºF)
    • Operation Humidity: 10 to 90% RH
    • Storage Humidity: 10 to 75% RH
    • Weight: 10 oz(285g)
    • Accessories: 9V battery, Carrying case, calibration screwdriver, 3.5Ø plug, windscreen and owners manual.
    • Tripod Connection Hole Able to connect Camera Tripot Stand  
  • DSL-331 sound level meter data logger FEATURES:
    • Auto Ranging Measurement 30dB to 130dB
    • Work with Window Software
    • 32,000 Records Data Logger
    • Bar graph Indication with Back Light
    • RS-232 Real Time Display Software for Window 95/98/2000 and Win10
    • Frequency Weighting: A, C
    • 4-Digit Display with updated cycle 0.5s
    • 0.1dB resolution
    • Max/Min Hold Function
    • The standard Fast and Slow Time weightings
    • AC/DC signal output
    • Overload condition indication
    • Auxiliary output jack
    • IEC 651 Type II, ANSI S1.4 Type2.
    • Back screw hole tripod connection
    • External Power DC 9V input
    • Calibration Potentiometer easy to adjust

  

Q & A:

We own one of your Tecpel 331 sound level meter data loggers which we used to measure the noise levels in patients rooms. The recording range was set 30-130 dBa, in fast recording mode. We had measurements of 28 dB despite the range of 30-130 dB. Could you please explain how this happen? Our findings will be published in a scientific journal hence we may need to explain this to reviewers. 
Your help is much appreciated

Answer: Our sound level meter logger design can measure starting from 25 db but 30 dB is the
limit of our published specification. Therefore, it is possible to have 25 ~ 29 dB, if your environment  is quite calm in a closed room.



 

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