3 DATA ACQUISITION
Data acquisition functions are the core of the OS310 management firmware. Aim of data acquisition
functions is to collect, convert, show and store in memory (if needed) data acquired from all the probe
sensors. Acquired data is stored in ADC counts (probe digitizer output) but is shown in engineering
format to simplify the comprehension of the acquired values by human operators. Conversion from
ADC counts, and engineering units takes place using the algorithm described in the calculation section
and by means of the calibration values. Invalid data is obtained if the sensors have not been calibrated
at least once. In this situation, acquired data is represented by the -9999.9 value.
The operations performed by the probe for each data acquisition function are described below. Data
acquisition can be run with the probe operating in “Verbose” and/or “Non-verbose” mode. In the latter
case, procedures on how to start and stop data acquisition are described in the “Ocean Seven 3xx PTP
Data Transmission protocol” manual. The below paragraphs describe data acquisition functions once
the probe operates in “Verbose” mode.
3.1 THE DATA ACQUISITION MENU
Whenever data acquisition is selected from the probe Main Menu, the following message appears:
OCEAN SEVEN 310 - ID:0317003 {USR}(1.0_10 05/17)Oct 01 15:02:42.02 2016
<0>[DAUP]-Leave data acquisition menu
<1>[DAMD]-RealTime data acquisition
<2>[DALD]-Linear data acquisition
<3>[DATD]-Timed data acquisition
<4>[DACN]-Conditional data acquistion
<5>[DACO]-Continuous data acquistion
<6>[DABU]-Burst data acquisition
cmd>
Selection of the desired function is performed by typing one of the acronyms contained in the square
brackets or pressing the corresponding digit contained in the <> bracket. Pressing <ESC> key or [DAUP]
command forces the programme to go back to the "Main Menu"; pressing <ENTER> key re-displays the
"Data Acquisition Menu".
3.2 ACQUIRED PARAMETERS
Acquired and shown parameters are those that have been configured using the probe commands
available under the “Configuration” menu. All data acquisition functions use the configuration
information to acquire, show and store data in memory. Details about data storing method and
processing can be found in the dedicated section of this manual. While data acquisition cycles are
running, the CTD shows data in scrolling up rows, with a column assigned to each parameter.
3.3 COMMON RULES TO SET UP THE DATA ACQUISITION CYCLE
Configuration of wrong parameters during the set-up of a measurement cycle can cause the malfunction
of the probe and, in some cases, the probe cannot respond to the operator’s request to perform or
interrupt the configured data acquisition cycle. Should this accident happen, please contact IDRONAUT
to obtain the relevant instructions on how to revive the probe operation. As a general rule, never
configure a value to 0 unless explicitly foreseen or requested by the configuration procedure and well
described in the manual.
3.4 COMMMON RULES TO STORE ACQUIRED DATA
At the end of an acquisition cycle, data “temporarily” stored in memory must be confirmed. The data
acknowledgement procedure for all the data acquisition methods is different if the probe is working on
line or if it is performing unattended acquisitions.
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