TECPEL- Propel Quality Measurement

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Programmable  Sound Level Datalogger


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  ☆ 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.

 Calibration Potentiometer easy to adjust

 Back screw hole tripod connection

 External Power DC 9V input 

 Calibration Potentiometer easy to adjust


programmable sound level data logger recorder
sound level data recorder
Model : DSL- 331

Sound Level Meter recorder, data logger

Specifications :  with CE approval

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
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, RS-232 cable (USB Cable Optional) .
Tripod Connection Hole Able to connect Camera Tripot Stand 

Software operation illustration of

Digital sound level data logger TECPEL DSL-331

Software operation illustration of

Q & A:

We own one of your Tecpel 331 sound 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 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.


Video for operatiing sound level logger of TECPEL DSL-331











E-MAIL: sales@tecpel.com ; oka@oka.com.tw
Tel : 886 (2)2737-5866 FAX : (02)2737-3343
Web-site: http://www.tecpel.com; http://www.oka.com.tw


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