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CR831C Integrating Sound Level Meter with Third Octave Band Filters

  Sound Level Meter Using It Software Options Similar Meters  

Using It - Making a Noise Measurement

This sound level meter is ideal for most environmental noise measurement, industrial noise surveys, and many other applications such as occupational noise assessments. It can also be switched into Octave or 1/3 Octave Band mode to assess the frequency content of the noise.

The noise measurement process consists of:

  • Checking the meter's calibration. This is important for any measurements that may be used for legal purposes.
  • Making the measurements, either broadband, octave or 1/3 octave band mode.
  • Viewing the noise measurement results.
  • Presenting reports.

calibrating the sound level meter

Checking the Calibration

  1. Fit the calibrator onto the microphone as shown opposite.
  2. Switch the Calibrator on.
  3. Select Calibrate in the menu and press OK.

The meter will automatically check its calibration and make any adjustments. If there are any major problems with the meter or microphone capsule it will report an error.

The results of the calibration are stored and can be viewed on the display or downloaded using the software provided.

broadband noise measurement

Manual Noise Measurement

  1. From the menu Select Broadband, Octave or 1:3 Octave mode.
  2. Position the microphone.
  3. Select a suitable measurement range using the Range key key.
  4. Press the Run key to start the measurement.
  5. In manual filtered mode, switch through the bands at will.
  6. To finish the measurement press the Stop key.

The results of the measurement can be read from the display. The measurement is automatically stored so that it can be viewed again later or it can be downloaded to the software.

automatic noise measurements

Making Automatic Timed Measurements

The Sound Level Meter can be set to make timed measurements.

Broadband - Timed and Repeating Measurements

  1. Using the menu options, set the measurement time (e.g. 15 minutes).
  2. Select the Repeat option to make multiple noise measurements.
  3. Press the Run key to start the meter running.

The Sound Level Meter will now make repeating measurements, automatically storing each one.

Octave and 1/3 Octave Timed Measurements

  1. Using the menu options, set the measurement time (e.g. 5 minutes).
  2. Press the Run key to start the meter running.

The meter will automatically step through each of the octave or 1/3 octave bands, covering the whole band in the time selected.

connect sound level meter to computer

Viewing the Noise Measurements

The noise measurements can be viewed on the meter's display or you can connect the meter to a computer and download them using the software and cable that are included.

The Deaf Defier software can store the results for further analysis and present various noise reports. For more information please visit the software web page.




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