Casella CEL CEL-393 - Manual (Page 16)

Warning
Ensure that the instrument is switched OFF when-
ever connections or disconnections are made.
The preamplifier may be fitted directly into its socket on the top of the
instrument by offering it up, rotating until it locates in the keyway and
then pushing it home. Having connected the preamplifier, it is a simple
matter to screw the microphone onto the top (Figure 4). It is not necessary
to secure the microphone more than 'finger tight' as excessive force on
the capsule could distort the diaphragm and thereby affect its calibration.
It is recommended that the instrument is always used in conjunction with
the CEL-2962 Windshield which is simply pushed over the microphone
and preamplifier assembly. The instrument itself may be hand held at
arms length, or for long measurements, it may be mounted on the
CEL-4627 Tripod by means of the bush located in the rear cover.
Alternatively, the microphone and preamplifier may be mounted in a
remote location, using the adaptor provided with the tripod, and con-
nected to the instrument via the 5 metre extension cable type C2942A/5
(10 metre and 20 metre cables are also available under the same part
number with the suffix changed to 10 or 20 respectively).
Figure 2 Battery insertion
890014
- ve
+ ve
Ribbon
Battery
/12. 393 Handbook