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CHAPTER 5
Calibration
41
6) Tap the
button on the screen to start the calibration.
Note:
Detecting level...
appears on the screen as feedback.
7) While 2250 Light is searching for the calibration signal and the signal level is stabilising, the
‘traffic light’ indicates a short green flash every second. When the level is stable, the traffic
light indicates a steady green and the signal is measured and used for calibration.
Once the
calibration has been completed successfully, the traffic light indicates a short yellow
flash every 5 seconds.
The
Sensitivity
is automatically calculated and displayed in a pop-
up together with the deviation from the last calibration. Tap
Yes
to accept and use the new
sensitivity and save it in the calibration history. Tap
No
to disregard the new calibration
and continue with the old calibration.
If the calibration deviates more than
1.5 dB from the initial calibration, then the
calibration is stopped without changing the calibration of the instrument. The traffic light
will indicate a fast flashing red and an error description will appear in the status field.
Hint:
If the microphone is separated from 2250 Light using a microphone extension cable
then place 2250 Light so it can be seen from the location of the microphone. Start the
calibration process, (select the
Calibration
screen and tap the
button on the
screen, then go to the microphone and fit the Calibrator onto the microphone, switch on
the calibrator and monitor the traffic light on the 2250 Light, as discussed previously.
8) Once you have completed the calibration, tap the
button and remove the
calibrator. It will automatically switch off after a few seconds.
5.2.1
Calibration Settings
Select the
Details
tab on the
Calibration
screen to view the calibration details, see Fig.5.2.
Fig.5.2
Calibration details
screen
This screen displays the following information:
•
Details of the last calibration: date, sensitivity, deviation from last calibration and deviation
from initial calibration
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