Casella CEL CEL-440 - Manual (Page 12)

sound level measurements. The main difference between the CEL-440
and the CEL-480 is the additional timing facility built into the CEL-480.
This allows the instrument to operate with delayed run start and stop
times and for narrow band models to make repeated frequency scans.
Versions of both
instruments are available for
broadband measurement,
broadband plus octave band
measurement and
broadband, octave band and
third-octave band
measurement. Frequency
bands are scanned
sequentially, with scanning
controlled manually or
automatically.
To simplify
operation, frequently used
measurement setups can be
stored for re-use. The setup
memory can accommodate
one factory setup and up to
four user specified setups for each bandwidth.
Simple procedures allow a measurement setup to be selected
and the instrument to make the required measurements and save them
automatically in separate data memories for each bandwidth.
Data stored in the memory can be recalled to the display for
inspection, so that the operator can confirm that the results are valid
before leaving the test site. When the instrument is connected to a
Centronics printer, results can be printed out in a preset report format
together with the setup data.
The instruments can be operated and deliver adequate results
without the need for other equipment, beyond an acoustic calibrator. All
operations can be controlled via the instrument keypad and simple menu
options. Figure 4 shows the basic arrangement of the menu structure.
However, the instruments become even more versatile when
their measurement and setup data is downloaded to a PC using the
Type 1 and Type 2 Measurement
Broadband, Octave Band and Third
Octave Band versions
Simultaneous measurement of up to 13
parameters in broadband mode
Simultaneous measurement of up to 3
parameters in narrow band mode
All broadband parameters can be
measured in a selected narrow band
1
Quick Edit function for immediate
parameter change
One factory setup and up to four user
specified setups stored for each
bandwidth
Up to two profiles can be attached to
each measurement (CEL-480 only)
Note 1: Not available before V 2.0 firmware.
Introduction
Page 12 - CEL-440/480 Operators Handbook