Manual revision 017
Section 2: Description of SBE 33
SBE 33
9
The SBE 33 can merge position data with CTD data. The SBE 33 decodes
messages that are output from navigation devices supporting NMEA 0183
protocol, in one or more of the following formats:
GGA - Global Positioning System Fix Data
GLL - Geographic Position: Latitude/Longitude
RMA - Recommended Minimum Specific Loran-C Data
RMC - Recommended Minimum Specific GPS/TRANSIT Data
TRF - TRANSIT Fix Data
DBT – Depth Below Transducer
DPT – Depth
Decoded NMEA data is appended to the CTD data stream in the SBE 33, and
are passed to the computer for storage and/or display with the CTD data.
The SBE 33 includes an A/D converter for a Surface PAR light sensor. The
SBE 33 supplies 12 volts to power the sensor, and appends the data to the
CTD data stream.
The SBE 33 can also be used with the Power and Data Interface Module
(PDIM) and a number of Sea-Bird CTDs when a Water Sampler is not
available or needed. The PDIM provides the same power and CTD data
interface functionality as the SBE 32 or 55 Water Sampler, but without water
sampling capability. The PDIM is mounted to the CTD.
The SBE 33 is supplied with a powerful Windows software package,
Seasoft V2, which includes:
Seaterm
and
SeatermV2
– terminal programs for easy setup.
Seasave V7
– program for acquiring, converting, and displaying real-time
or archived raw data.
SBE Data Processing
– program for calculation and plotting of
conductivity, temperature, pressure, auxiliary sensor data, and derived
variables such as salinity and sound velocity.
Notes:
Help files provide detailed
information on the software.
NMEATest, a NMEA navigation
device simulation program, is part of
the SBE Data Processing
installation.
Separate software manuals on CD-
ROM contain detailed information on
Seasave and SBE Data Processing.
Sea-Bird supplies the current
version of our software when you
purchase an instrument. As software
revisions occur, we post the revised
software on our website. See our
website for the latest software
version number, a description of the
software changes, and instructions
for downloading the software.
Notes:
For NMEA depth data (DBT or DPT):
Depth data can be decoded and
merged with CTD data only if NMEA
position data (GGA, GLL, RMA,
RMC, or TRF) is also available.
Seasave (real-time data acquisition
software) and SBE Data Processing
(post-processing software) are
compatible with NMEA depth data in
the data stream.
Note:
This manual describes the primary use
of the SBE 33 with a CTD and Water
Sampler. Setup for use with a CTD
and PDIM is the same, except as
noted.