Unattended Acquisition In Function Of Time Increments; Preliminary Configuration; Field Operations - idronaut Ocean Seven 304Plus Operator's Manual

SECTION FOUR – SELF RECORDING
4.2.

UNATTENDED ACQUISITION IN FUNCTION OF TIME INCREMENTS

Unattended acquisition in function of time is useful once the CTD is used to monitor the environment
for long periods of time. Some examples of configuration and CTD behaviours are reported below.

4.2.1. Preliminary configuration

 Install new batteries or recharge the battery pack (optional NiMH battery pack).
 Run the "ITERM" programme.
 Connect the CTD to the personal computer using the USB laboratory cable and then switch ON the
CTD.
 The CTD main menu must appear.
 Check and set up the RTC, if needed.
 Select the "Data Acquisition" menu and then the "Timed data acquisition" function, answering the
following questions:
Data acquisition step: 00:01:00 < 00:00:30
Time interval that is used during the acquisition cycles to acquire and store data in memory. The
minimum interval time is 10 s.
Data Set per acquisition:5 < 1
Number of data sets stored for each time interval.
First acquisition time: 00:00:00
Data acquisition starting time. If the default value of 00:00:00 is confirmed, the CTD switches OFF
configuring the next acquisition time and adding the "data acquisition step" to the current date and
time. Otherwise, the next acquisition time will be the configured first acquisition time.
Next Time 10:00:00 10-09-2005
At the end of configuration, the CTD switches OFF by itself and waits for the next start-up before
starting to acquire data.
Confirm: [0)No 1)Yes]
The operator must confirm the configuration before the unattended measurement cycle can begin. 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.
Notes
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 data acquisition interval and
the present time.
2) The data acquisition ends whenever: i)The CTD battery has run down. ii) The data memory is
full. iii)The operator decides to stop it.

4.2.2. Field operations

Once you have reached 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, you can switch it OFF by rotating
back to OFF position the magnetic switch. The timed data acquisition cycle is temporarily suspended.
IDRONAUT – Brugherio (MB)
OCEAN SEVEN 304Plus CTD
34
12-2015