Sea-Bird Electronics SBE 45 MicroTSG, User Manual

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MicroTSG (Thermosalinograph)
SBE 45
Sea-Bird Electronics, Inc.
13431 NE 20th Street, Bellevue, Washington 98005 USA
Website: http://www.seabird.com
E-mail: seabird@seabird.com
Telephone: (425) 643-9866
Fax: (425) 643-9954
The SBE 45 MicroTSG Thermosalinograph is an externally
powered, high-accuracy instrument, designed for shipboard
determination of sea surface (pumped-water) conductivity and
temperature. Salinity and sound velocity can also be computed. The
MicroTSG is constructed of plastic and titanium to ensure long life with
minimum maintenance.
OPERATION OVERVIEW
Communication with the MicroTSG is over an internal, 3-wire,
RS-232C link, providing real-time data transmission. Commands can
be sent to the MicroTSG to provide status display, data
acquisition setup, data display and capture, and diagnostic tests. User-
selectable operating modes include:
• Polled sampling – On command, the MicroTSG takes one sample
and sends the data to the computer.
• Autonomous sampling – At pre-programmed intervals, the
MicroTSG samples and sends the data to the computer.
The MicroTSG does not enter quiescent (sleep) state between
samples.
• Serial Line Sync – A pulse on the serial line causes the MicroTSG
to wake up, sample, and enter quiescent state automatically.
Calibration coefficients stored in EEPROM allow the MicroTSG to transmit data in engineering units.
SENSORS
The MicroTSG retains the temperature and conductivity sensors used in the SBE 21 Thermosalinograph, but has
improved acquisition electronics that increase accuracy and resolution, and lower power consumption. The MicroTSG’s
aged and pressure-protected thermistor has a long history of exceptional accuracy and stability (typical drift is less than
0.002 °C per year). Electrical isolation of the conductivity electronics eliminates any possibility of ground-loop noise.
The MicroTSG’s internal-field conductivity cell is unaffected by external fouling, and uses expendable
anti-foulant devices.
OPTIONAL PN90402 - SBE 45 POWER, NAVIGATION, and REMOTE TEMPERATURE INTERFACE BOX
An optional AC- or DC-powered Interface Box:
• Provides isolated DC power and an optically isolated RS-232 data interface.
• Contains a NMEA 0183 port for appending navigation information from a NMEA navigation
device to the data stream.
• Contains an RS-232 port for appending the output of an optional remote temperature
sensor (SBE 38), allowing for measurement of sea surface temperature with minimal
thermal contamination from the ship’s hull.
• Outputs the data stream (MicroTSG, NMEA navigation device, and SBE 38 data) to the
computer over an RS-232 interface.
SOFTWARE
The MicroTSG is supplied with a powerful Win 2000/XP software package, SEASOFT© V2. SEASOFT’s modular
programs include:
• SEATERM — terminal program for instrument setup and data display.
• Seasave — real-time data acquisition and display
• SBE Data Processing — filtering, aligning, averaging, and plotting of data and derived variables.
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