YSI SonTek ADVField, Technical Documentation Manual

Page: 142 / 228

SonTek/YSI
ADVField Software Manual (September 1, 2001) 10
CONTINUOUS Recording Mode: In continuous mode, the ADV begins to record data upon
starting data collection and will continue to record data until stopped by the operator. Pressing
Ctrl+S will stop data recording to the disk, but the system will stay in the data acquisition mode
and continue to display real-time data. During this period, the status window at the bottom of the
screen will flash
NOT RECORDING
. Pressing Ctrl+Q will restart recording to the same file.
Note: The time stored by the ADV will
not
show the correct time when stopped and started. If
data collection is stopped and restarted, the only indication within the data file is that the
event counter will be incremented by 10 (see ¶2.4).
BURST Recording Mode: In burst mode, the ADV begins to record data upon starting data col-
lection and will record the number of samples specified by
Samples Per Burst
(SPB). After re-
cording SPB samples, the software will continue to display real-time velocity data, but will
not
record data to disk. During this period, the status window will flash
NOT RECORDING
. You can
start another burst by pressing Ctrl+Q, at which point the ADV will start recording data until the
SPB samples have been recorded. Recording will then stop, but continue to show the real-time
display. There is no limit to the number of bursts per file that can be recorded.
Note: In burst mode, the ADV does
not
record the exact timing for each sample after the first
burst. Later bursts will show a time relative to the start of the file that does not account
for the period during which data were recorded. The event counter in the ADV data file is
incremented by 10 at the start of each burst (the first burst starts at 0).
Pressing Ctrl+S while a burst is being recorded stops data recording, but the system stays in the
data acquisition mode and continues to display real-time data. (Note: This will change the num-
ber of samples recorded in that burst.) Subsequently pressing Ctrl+Q starts the recording of an-
other burst. The start of each burst increments the event counter by 10.
In any recording mode, you can stop data collection completely by pressing Alt+F10, and then
confirming “Yes” from within the multiple choice window. This exits the data acquisition mode
and returns you to the setup mode.
Record To File
(Enter filename)
This item assigns a disk file for recording ADV data. Several checks ensure that a valid filename
is given, the file can be created, and an existing file is not accidentally overwritten. If, after as-
signing a recording file, you want to turn off recording, do not enter a response to the filename
prompt. The file name must be entered without extension; all ADV data files use the extension
.ADV
. (Note: This option is disabled if the automatic file recording has been enabled, see ¶2.2).
File names must follow DOS conventions and are limited to a maximum of eight characters.
File Comment 1 / 2 / 3
(Enter text)
These items permit you to enter up to three 60-character lines of text, which will be included in
the data file for documenting the data set.
START Data Acquisition
(Press ENTER to execute)
When satisfied with all data collection parameters, press <Enter> on this item to start data acqui-
sition. The program initializes the ADV and enters the boundary adjustment mode.
EXIT
(Press ENTER to execute)
Pressing <Enter> on this item terminates the program and returns to DOS. On exiting, the pro-
gram saves the current values of all menu parameters (except the recording file) so that they need
not be re-entered each time the program is run.