SonTek/YSI
80
ADVField Operation Manual (September 1, 2001)
4.12.3. Set Up ADVField/Hydra for use with LISST
LISST data collection is only supported when the ADVField/Hydra operates in burst mode. If
burst mode is not enabled, and the LISST sensor option is enabled, the data collection loop will
not start. The data collection sequence is as follows.
When the ADVField detects the beginning of the burst interval, it tries to communicate with the
LISST sensor. If communication was successful, the ADVField sends the number of samples
(profiles per burst or PPB) and sampling rate (averaging interval) to the LISST along with a start
data collection request. The ADVField then proceeds with its own burst data collection loop. At
the end of the burst, the ADVField communicates with the LISST and uploads the PPB samples.
If the ADVField was not able to establish communication with the LISST at the beginning or at
the end of the burst, PPB blank samples are stored in the recorder to preserve the integrity of the
ADVField file. Note that the data upload from the LISST needs to be completed before the next
burst can be initiated; this effectively increases the length of the burst. Make sure you allow for
this extra time (approximately 120 s for 1200 LISST samples) when setting the burst interval.
To set the ADVField/Hydra for data collection with the LISST:
•
Set AI = PRI
•
Set Burst Mode (BM) = YES
•
Set PPB to a value between 2 and
•
Set Burst Interval to be longer than (PRI * PPB) + Download Time
•
Set other ADVField/Hydra settings (PG, RPG, nCells, etc).
Initiate deployment by issuing a
START
or
DEPLOY
command. Note that if the ADVField cannot
establish communication with the LISST after a
START
or
DEPLOY
command is issued, the ADV-
Field will abort the data acquisition loop with an error message.
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