Casella CEL CEL-393 - Manual (Page 26)

Delayed Start Time
This is entered as a four digit number representing the required start time
on a 24 hour clock, in the same 24 hour cumulative manner as the main
clock, allowing delays over into following days to be programmed. It is
entered by the key sequence 0 followed by C. Therefore, the programme
identifies five numerals followed by C as a request to preset the delay
start time. However, only the first four digits, are read by the programme
as data.
When a delay start time has been entered, the delay start flag is set on,
while the measurement sequence continues as normal. However, the
period counter will not decrement, and hence no answers can be stored
until after the delay start time has passed. When the main clock passes
the delay time, the delay flag is set off, and the period clock will start
decrementing.
It is important to appreciate that the delay start time operates in the
environmental mode only. Resetting current period data (0R), changing
period time, or resetting the main clock cancels the delay start request,
but leaves the time set in the display register. Hence to use the delay
start time function, it must be the last operating condition loaded.
Alternatively the 'del' time may be used to indicate the start time of a
measurement sequence by setting it to the start time prior to entering the
period time. This provides a convenient reference to the start time when
the results are reviewed.
Memory
The memory mode is related to the selected period time, and resetting
the main clock or the period time will reset all stored data and cancel the
delay start flag.
The memory key (M) is used to index the contents of the memory, and
it is important to appreciate which memory mode is in use, in order to
understand the operation.
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