Casella CEL CEL-368 - Manual (Page 23)

All results are stored in digital form and are available for downloading to
an industry standard personal computer (PC) for further analysis, data
manipulation, origination of report ready documentation, and permanent
storage. Some stored items may be selected and downloaded directly to
a Centronics compatible printer to produce an immediate hard copy.
2.3 Measurement Modes
Both instruments can operate in three measurement modes simultane-
ously. Cumulative mode is ALWAYS operational, however data from
either or both period and event modes may also be collected at the
same time. More storage space becomes available whenever one or
more of the measurement
modes is not in use.
Cumulative:
Cumulative data is calcu-
lated and stored for the
whole of the current log-
ging run (=cumulative pe-
riod). This also facilitates
the determination of re-
sults for periods with non-
standard lengths, and in
practice, results can be
obtained for ALMOST ANY PERIOD. Data can be collected for periods
shorter or longer than the interval set for period mode. The only limita-
tions are due to the manual timing of an interval shorter than one m-
inute, or the availability of power for long term measurements.
Cumulative results (for a whole logging run) become available only AF-
TER THE RUN IS COMPLETE.
Period:
A series of measurements will be made, and period results calculated
and stored at regular intervals determined and set by the user.
Four cumulative runs can be stored.
A maximum of 999 period results can be
collected during each logging run.
In addition, up to four profiles can also
be stored during each run.
A maximum of 999 events can be
collected during each logging run.
In addition a 1 sec SPL max. profile of
the first 5 minutes of the event can also
be stored during each run.
CEL-268/368 Operator's Handbook - Page 19