SV 104 USER'S MANUAL_
DRAFT
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34
3. Switch on the calibrator and wait ca 30 seconds for the tone to stabilise before starting the
calibration measurement
4. Start the calibration measurement by pressing the
<ENTER>
key
5. The calibration measurement time is set to 1 second with 3 seconds delay and stops until the same
result is obtained 3 consecutive times. It is possible to stop the calibration measurement by pressing
two keys at the same time
<PROFILE>
and
<ENTER>
.
Figure 4-8
Calibration - initial delay screen
6. Delay before starting calibration measurement is counted down on the display. After the
measurement, its result is presented on the display.
Figure 4-9
Calibration in progress screen
Notice:
To quit the calibration procedure without saving the calibration factor press
<PROFILE>
and
<ENTER>
.
7. It is recommended to repeat the calibration measurement a few times. The obtained results should
be almost the same (with
±0.1 dB difference). The reasons for the unstable results are as follows:
the calibrator is not properly attached to the instrument
there are external acoustic disturbances such as high noise levels close by
the calibrator or the measurement channel (for example the microphone) is damaged
Notice:
During the calibration measurement, the external disturbances (acoustic noise
or vibrations) should not exceed a value of 100 dB (when using a calibrator that generates a level
of 114 dB).
8. Press the
<ENTER>
key in order to accept the measurement result.
Figure 4-10
Calibration confirmation screen
Notice:
If a calibration factor does not meet tolerance criteria, you still can manually accept
the microphone, but be aware of results see
new
calibration factor
previous
