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.

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 key.
4. Press the key to start the measurement.
    
5. In manual filtered mode, switch through the bands at will.
6. To finish the measurement press the 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.

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 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 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.

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.