Campbell OBS-3A Dokumentacja Pobierz pdf (Strona 22)

Section 3. Operations

4. A file for logging data was created when you started the OBS-3A Utility.

You can review data at any time with

Open and import the log file

directly into an Excel spreadsheet for post-survey processing and plotting

(see Section 3.18—Excel Spreadsheets)

3.12 Cyclic Sampling

This mode is for logging data at regular time intervals such as 1, 10, 15, 30,

etc. minutes for example.

1. Request Barometric Correction from the OBS menu. Be sure to do this

while the OBS-3A is at the surface. Doing so when the instrument is

submerged will result in large depth errors.

2. Click

and select sensors, statistics, depth units (meters or feet), water

temperature, and salinity. Selection of temperature and salinity only

affects the depth calculation. It does not influence temperature or salinity

measurements.

3. Configure the Wave Setup if you want to measure wave heights and

periods (see Section 3.8—Definitions). Do this before scheduling the

other sample parameters.

4. Select Interval, Duration, Rate, and Power level; see recommendations

in “Sampling Schedules” (Section 3.9). The duration must be longer than

the Record Length. The minimum duration for the Record Length will

be computed and displayed by the OBS-3A Utility.

5. Click Start Sampling to begin logging data. Unplug test cable; install

dummy plug and locking sleeve. The instrument is ready for deployment.

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Campbell OBS-3A Dokumentacja Strona 22