Valeport fastCTD, Руководство по эксплуатации

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fastCTD and fastCTD plus : MANUAL-2034990662-4 | issue: 1.0
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2021
– Valeport Ltd
3 Data Acquisition
The fastCTD uses the concept of distributed processing, where each sensor has its own
microprocessor controlling sampling and calibration of readings. Each of these processors is then
controlled by a central processor, which issues global commands and handles all the data. This
means that all data is sampled at precisely the same instant, giving superior quality profile data.
The fastCTD features a selection of pre-programmed sampling regimes, covering many standard
applications. Data may be sampled at up to 32Hz for all sensors, making it suitable for rapid
profiling or for continuous measurement at a fixed point
3.1 Sampling Modes
Three specific sampling modes are available:
Continuous:
Regular and synchronous data collection from all sensors up to 32Hz
Profile:
Data is logged as the instrument descends (or rises), by a user defined pressure difference,
through the water column.
Rapid:
Once the instrument is set to run mode no data is logged until a programmed trigger depth is
reached (e.g. 2 metres below the surface). Completely programmable, the device can be set to
record down cast data only, for example, when the probe stops descending and rises by a
defined amount logging is stopped.