Casella CEL CEL-393 - Manual (Page 29)

Operation of any numerical key followed by M will bring the start time of
the first filter sweep in the memory to the display. Subsequent operations
of the M key step through the results in ascending order of filter centre
frequency, and then on to the time of the second filter sweep that has
been stored, and so on. Again a numeral followed by M will return to the
first sweep in the memory.
Memory capacity is approximately 475 results.
Pause
Operation of this key activates the pause function, bringing the
mnemonic to the display thereby stopping the digital display. A sub-
sequent operation returns the instrument to its original state.
Whilst paused, the analogue bar graph continues to operate together
with the real time clock, but the period counter is stopped for the duration
of the pause. This feature ensures that the total measurement period will
always be as selected, but the self synchronising function for certain
period times should be noted. No new data is added to either the integral
or statistical registers whilst paused.
Remote Pause
The remote pause function is activated by holding pin 15 of the auxiliary
socket at +5V with respect to 0V on pin 6 (for at least 0.02 seconds).
Normal operation is restored by returning it to 0V. If normal pause is
already selected when the remote pause is activated, the unit will remain
paused. However, if the manual pause button is depressed when the
remote pause is applied, the pause condition will be cancelled. Sub-
sequent operation of the manual pause button will re-enter the pause
condition. To restore the pause remotely once manually cancelled, the
remote pause line must be taken to 0V for at least 0.02 seconds.
Analyser
This control is not operative on the A version of the instrument. Its
operation on the B version is fully described in Chapter 5.
393 Handbook /25.