Casella CEL CEL-368 - Manual (Page 9)

With the CEL-368 and CEL-282, care-
fully fit the CEL-4725 Microphone Cou-
pler (supplied with calibrator) over the
end of the microphone/preamplifier
unit, making sure the microphone is
correctly seated against the shoulder in
the coupler cavity. Then fit the coupler into into the calibrator, again mak-
ing sure the coupler is firmly seated against the shoulder in the calibra-
tor cavity.
Both calibrators generate a 114.0 dB calibration level at 1 kHz. If neces-
sary, use
and to adjust the dis-
played sound value to show the level being
generated by the calibrator.
The level change produced by one press of the
keys is less than the 0.1 dB resolution of the
display, so more than one press may be re-
quired to produce a visible change.
Once the correct level is displayed, press
to end the calibration sequence and display
the SETUP screen. EXIT
Microphone &
Calibrator
'O' Ring
Shoulder
'O'-Ring
Microphone
Shoulder
Preamplifier
Microphone/
Preamplifier Unit
Type 2 Instruments
Type 1 Instruments 900108
CEL-284/2
or CEL-282
Coupler
CEL-268/368 Operator's Handbook - Page 5