3.16 BURST DATA ACQUISITION
Burst sampling allows collecting a “burst” of data at regular time intervals. During each single burst,
data is acquired using a configurable sampling rate. To save the internal battery energy, the probe
switches OFF and ON by itself between bursts. Burst sampling is somehow complementary to “time”
acquisitions. Whenever this command is selected from the data acquisition menu, the following
message appears on the PC screen:
From the Main Menu, select the data acquisition menu and then the “Burst Sampling” function
answering the following question:
Burst data acquisition cycle setup
Burst time step: 00:05:00
The time interval between consecutive burst acquisitions. Afterward the burst acquisition sample rate
must be configured
Data acquisition scan rate [50ms]:50 enter new value< 250
The operator can select a sampling rate between 0.1 and 28 Hz by configuring the associated time among
the samplings expressed in ms, the most common are:
Sampling rate Interval to configure
28 Hz 35 ms
20 Hz 50 ms
10 Hz 100 ms
5 Hz 200 ms
1 Hz 1000 ms
0.1 Hz 10000 ms
The number of acquisitions to be carried out for each burst must be configured.
Burst acquisitions:10
The number of burst cycle can be configured
Number of burst cycle repetition:1
Afterward the burst cycles starting time can be configured.
Enter the starting burst time [HH:MM:SS]
Starting time: 00:00:00
Data acquisition starting time. If the default value of 00:00:00 is configured, the CTD immediately
performs a burst cycle and then switches OFF configuring the next acquisition time and adding the
“time between burst cycles” to the present date and time. Otherwise, the next acquisition time will be
the configured first acquisition time and the CTD switches OFF.
3.16.1 Field operations
At the sampling site, switch ON the probe by rotating the magnetic switch rotating to the ON
position. When the CTD returns to the surface, switch it OFF by rotating the magnetic switch
back to the OFF position. The Burst sampling cycle is suspended.
3.16.2 Ending the unattended data acquisitions
1. Run the “ITERM” programme.
To Next Page
Loading...