22
meaning of LED signals
Red (ALm)
Flashes 2 x if the upper limit value of the preset alarm range has been
exceeded.
Flashes 1 x if the lower limit value of the preset alarm range is undershot.
Flashes 6 x in 2 seconds if the measurement is stopped manually
yellow (ALm)
Flashes in ten second intervals after the measurement has been stopped
manually.
Green (REC)
Flashes during the measurement at the frequency set under “LED Flash
Cycle Setup”.
Flashes 6 x in 2 seconds if the measurement is started manually
Flashes 5 x if a new battery is inserted
Red - Green - yellow
Displayed when measurement is started automatically
Red - yellow
Measuring data are imported to the PC
Red - Green
Flashes in 10 second intervals when the battery needs to be replaced.
DISPLAyING DATA LOGGER READOUT
10.
Start the “Sound Data Logger” program and connect the data logger to the computer.
1.
From the menu, select “Instrument – Download Data”. You can also click on the icon with the
2.
yellow arrow with black background.
Press “Download” to confirm. The measuring curve of the measurement is displayed.
3.
To save the data, choose “File – Save” from the menu. You can also click on the disc icon.
4.
To exit, close the program window.
5.
After you are finished reading data from the data logger, always disconnect it from the computer.
6.
Keeping the data logger connected to the USB port of the computer for extended periods
can result in a premature discharge of the battery.
CALIBRATION
11.
The sound level meter corresponds to the European standard EN 61 672-1 for sound level meters.
To apply the device in line with the standard, it must be calibrated with the benchmark curve A (dBA)
prior to each measuring operation, meaning tested and if necessary matched with a sound calibrator
Class 2 acc. to IEC 60942. The accuracy must be checked again after each measuring operation.
Proceed as follows for calibration:
Switch the sound level meter on and plug the microphone of the sound level meter into the opening
1.
of the sound calibrator. Ensure a tight fit so that the calibration chamber in the sound calibrator
is sealed.
Set the following parameters on the sound calibrator: 94dB at 1 kHz.
2.
Connect the data logger to your computer and display the readout of the measurements. The
3.
measuring curve should now display a constant sound level of 94 dBA. If this is not the case, the
measuring device has to be calibrated.
Select “Instrument – Calibration Adjustment” from the menu.
4.
