SECTION FOUR
–
SELF RECORDING
IDRONAUT
–
Brugherio (MB)
OCEAN SEVEN 304
Plus
CTD
12-2015
38
Time between data sets in a single burst [125ms..60000ms]:125 <
Time interval between consecutive dataset acquisitions in a single burst cycle. The minimum interval
time is 125 ms; the maximum interval time is 60 s. The minimum value is 125 ms and can be increased
by 125 ms as follows:
Sampling Rate
Set-up parameter
8 Hz
125 ms
6 Hz
166 ms
4 Hz
250 ms
2 Hz
500 ms
1 Hz
1000 ms
0.1 Hz
10000 ms
First acquisition 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.
NxTime 10:00:00 10-11-2012
At the end of configuration, the CTD switches OFF by itself and waits for the next start-up time.
Confirm: [0)No 1)Yes]
Before the unattended measurement cycle can begin, the operator must confirm the configuration. In
case of a negative answer, the CTD returns to the Main Menu. Vice versa, a positive answer causes the
CTD to switch OFF by itself, ready to perform the configured data acquisition cycle.
Note
1)
Once started, the data acquisition cycle can be interrupted at any time by rotating the magnetic switch arm
to the OFF position. The cycle will start again when the CTD is switched ON. The new data acquisition
time-out is automatically calculated using the time between burst cycle and the present time.
2)
The burst sampling ends whenever: i)The CTD battery has run down. ii) The data memory is full. iii)The
operator decides to stop it. iv) The configured burst cycle has been perfor
med.
4.5.2.
Field operations
At the sampling site, switch ON the CTD by positioning the magnetic switch rotating arm over the red
dot. 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 temporarily suspended.
4.5.3.
Ending the unattended data acquisitions
Run the “ITERM” programme.
Connect the CTD to the personal computer using the USB laboratory cable and then switch ON the
CTD.
The CTD start-up messages appear.
Type the
<CTRL-C>
key until the Main Menu appears.
The unattended burst sampling cycle is ended and the CTD is working in the standard mode,
waiting for the operator’s commands.
Summary of Contents for Ocean Seven 304Plus
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