Casella CEL CEL-450 - Manual (Page 41)

Operation Press Display Shows Comments
7. Edit the
Automatic
calibration
level
Press or to change
the level over the range 85.0
to 130.0 dB in 0.1 dB steps.
Press again to save
the new level.
8. Perform a
new
Automatic
calibration
or
Highlight L ZF again.
Then as described in Step 4,
press to perform an
automatic calibration to the
new level.
4.3 Manual Calibration Check of the
Microphone
Normally, Auto calibration will be used as the most convenient method.
However, the user has the option of performing a manual microphone
calibration, for example iwhen the calibration source is outside the limits
of the automatic calibration (85.0 to 130.0 dB).
Operation Press Display Shows Comments
1. Start with
the Auto
calibration
screen
This is the Calibration Check
screen.
It shows the current sound
level.
2. Highlight
Auto or
This allows manual
operation to be selected.
CEL-450/490 Operators Handbook - Page 41
Acoustic Calibration Check