Casella CEL CEL-296 - Manual (Page 15)

Figure 4: Control panel and display showing all indicators
(All indicators will be displayed at the same time only at start up)
CEL sound level meter, the viewing angle has been selected to
optimize the clarity and legibility of the reading when hold slightly
away from the Operator's body as required by the relevant
measurement standards. or when fitted to the CEL-4627 Tripod.
When operating with a sound level meter equipped with the CEL low
power serial interface, the filter band centre frequency is presented
on the right hand side of the display, and sound level (repeated from
the sound level meter) on the left. This avoids dividing the Operator's
attention between two displays during analysis, and eliminates the
need for a sound level meter to be connected when recalling stored
results.
Sound level meter displays can also show other parameters such as
battery level, elapsed time, or event threshold values, that are not
noise levels. At such times, the reading may be repeated to the filter
set, but the dB indication will be suppressed as an indication that
they should be ignored.
When used with a sound level meter (or other instruments) NOT
equipped with the interface, there are neither repeated sound levels
CEL Instruments Ltd CEL-296/3 Operator Handbook Page 15