CASELLA CEL CEL-450 Handbook page 42

Acoustic Calibration Check
Operation Press Display Shows
3. Select
Manual
calibration
4. Return the
or
highlight to
L
ZF
5. Switch the
Calibrator
ON
6. When the
level
shown is
incorrect
for the
current
microphone
and
response
7. Adjust the
display to
and
show the
correct
calibration
level for
the
microphone
and
response
Page 42 - CEL-450/490 Operators Handbook
Comments
This is the manual calibration
check screen. It shows the
current sound level and
details of the last calibration.
If the Calibration screen
shows a "Scale ... " line
instead of "Manual", the
last calibration was
performed via line input (see
Section 5.5).
This allows the displayed
level to be changed
manually.
This is the level determined
by the sound level meter.
The Calibration levels for the
CEL Class 1 and Class 2
microphones and for Free
Field and Random response
are shown in Table 1.
This enables the quick edit
function.
More than one key press
may be required to give a
visible change in level.