Casella CEL CEL-440 - Manual (Page 10)

instrument body. Face the red dot on the preamplifier to the front of the
instrument so that the key engages in a keyway in the socket to ensure
correct pin connection.
(To disconnect the
preamplifier unit from the
instrument, pull on the
knurled sleeve.)
Load four new 1.5 V
batteries (AA or equivalent)
into the battery
compartment in the rear of
the instrument (Figure 3).
Make sure they are
inserted in the orientations
shown inside the
compartment.
One cell installed with wrong polarity may still
allow the instrument to function, but can
cause overheating severe enough to rupture a
cell and damage the instrument.
1.4 Switch Instrument ON/OFF
1. Press to switch the instrument ON.
Early firmware may briefly show the last used screen if it has only
recently been switched OFF.
Serial Number Label
Tripod Bush (1/4" Whit.)
980016
Figure 3: Battery orientation
Preamp
CEL48ØA.1 vNN.NN
I/O
Test
ID:
Type 1
None
1 6/1Ø
NNNNNN
p-01
Inst. Type 440/480
Inst. Version A = Broadband
B = Octave band
C = Third octaves
1 = Type 1
2 = Type 2
Firmware version
Interface status
Self test progress number
Inst. identification number
Introduction
Page 10 - CEL-440/480 Operators Handbook