Casella CEL CEL-368 - Manual (Page 37)

Pause activity,
Current operating mode,
Sound levels,
Signal overload,
Battery voltage.
Both AC and DC analog output signals proportional to the indicated in-
stantaneous SPL value are available from an auxiliary socket in the
base of the instruments. The conditioned RMS AC output has a full
scale deflection value of 5.775 V RMS, while the DC output is a logarith-
mic signal that is nominally 49 mV/dB with a typical maximum value not
exceeding 5 V.
In addition to the analog outputs, both instruments are equipped with a
CEL low power digital interface (also accessed via the 18-line connec-
tor) to allow them to feed all digital data to a PC, or a selected sub-set of
data directly to a printer.
Connection to a PC requires a special cable to convert the signal levels.
Contact CEL for details. However, both CEL-268 and CEL-368 have a
built-in Centronics compatible interface, so that connection to a Centron-
ics printer is direct pin to pin. More detailed information on the output
and input facilities will be found in Sections 4.9 & 4.10 and in Chapters 8
& 9.
4.7 Built-in Timer
The instruments have a built-in timer which enables data logging to be
started and stopped automatically.
The user can set up to FOUR sets of run and stop times which enable
the timer to be used to start a run, stop a run, start and stop a run, or
control a "continuous" run of up to four days saved across the four
stores. Run and end times are set and activated via the TIMER menu.
When the timer has been switched ON, and is pressed to start a
logging run, the instrument looks for the first active time.
RUN
PAUSE
CEL-268/368 Operator's Handbook - Page 33