3.13 TIMED DATA ACQUISITION
Timed data acquisition method allows the acquisition of data sets in relation of predefined time
intervals. This method allows the probe to perform acquisitions in function of time intervals for short
or very long periods by means of the probe integrated data logger capabilities. These capabilities mainly
consist in the fact that the probe carry out the power OFF and ON cycles at pre-set time intervals and
can operate in an unattended mode. This capability prolongs the battery life because, once the probe
waits for the data acquisition interval time, it does not consume power as it is in OFF condition. The
built-in real-time clock calendar is used to automatically and precisely set up the time intervals and
wake up the probe at the right time. Before starting the probe time and date must be set.
When selected from the main menu, the following message appears on the PC screen:
OCEAN SEVEN 310 - Jun 13 08:35:24.61 2017
Timed data acquisition configuration
Data acquisition step: 00:00:00
This time, entered in the format [hh:mm:ss] (from 00:00:05 to 23:59:59), represents the time interval
between two consecutive data measurements. The operator is requested to enter the time in the format:
hours, minutes, seconds. When the built-in OFF/ON power capabilities of the probe are used to perform
unattended time measurements, the step cannot be shorter than 5 seconds.
After the data acquisition interval is configured, the following message appears:
Number of acquisitions:0 enter new value< 100
The operator must enter the number of timed acquisition cycles he intends to perform.
Data set to be stored per each acquisition:2 enter new value< 2
For each timed acquisition cycle, it is possible to acquire more than one data set. The number of data
sets and the number of timed acquisition cycles are controlled to guarantee that there is enough space
in memory to store the data that will be acquired. If the request overpasses the memory capability, a
message informs the operator that the configuration cannot be accepted. In case the time step used is
hundredths of seconds, the number of data set must be configured as 1.
Enter the starting acquisition time [HH:MM:SS]
Starting time: 00:00:00
The operator can decide the time when the first measurement cycle will be carried out. In case the
entered time is higher than the present time by more than 10 seconds, the interval time will be
automatically spent with the probe in an OFF condition. Confirming the default value of 0 tells the probe
to perform the first measurement immediately.
Do you confirm the above ?:No type [Y]es or [N]o < y
Answer NO return to the data acquisition menu.
Answer YES the probe shutdown waiting the next wakeup to start a data acquisition cycle in function
of time. Afterwards, the probe automatically executes a “Shut-Down procedure” and switches off by
itself if the time interval to wait is greater than 30s:
Press Temp Cond Sal Dens O2ppm O2sat% pH eH Time & Memory
Timed acquisition Keyb.Cmd: <ESC>Leave data acquisition
Press Temp Cond Sal O2Sat% O2ppm pH Eh Time&Memory
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