MicroTSG (Thermosalinograph)
SBE 45

Print version     Current manuals - SBE 45 & Interface Box  (older manuals)     Reference Sheet     Configuration options & accessories

SUMMARY

• 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.
• Constructed of plastic and titanium to ensure long life with minimum maintenance.
• Five-year limited warranty.

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) mode between samples.
• Serial Line Sync – A pulse on the serial line causes the MicroTSG to wake up, sample, and enter quiescent mode 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 PN 90402 - 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 our powerful Win 2000/XP software package, Seasoft^© V2. Seasoft's modular programs include:

• Seaterm^©  – a terminal program for easy communication and data retrieval.
• Seasave^© – real-time data acquisition and display.
• SBE Data Processing^© – filtering, aligning, averaging, and plotting of data and derived variables.

INSTALLATION

MCH4SS

System Schematic: MicroTSG

System Schematic: MicroTSG with Optional 90402 Interface Box and Remote Temperature Sensor

SPECIFICATIONS

* For specifications for optional SBE 38 remote temperature sensor, see SBE 38 datasheet.

Time Resolution: 1 second

Clock Stability: 13 seconds/month

Input Power: 8-30 VDC

Acquisition Current: 34 milliamps at 8 VDC; 30 milliamps at 12-30 VDC

Quiescent Current: 10 microamps

Acquisition Rate: 1 Hz maximum

Operating Pressure: 34.5 decibars (50 psi) maximum

Flow Rate: 10 to 30 ml/sec (0.16 to 0.48 gal/min)

Materials: PVC housing

Weight: 4.6 kg (10.2 lbs)

Documentation -- manual, photos, technical papers, application notes, etc.

• Current product manuals -- SBE 45 and PN90402 - SBE 45 Power, Navigation, and Remote Temperature Interface Box (older manuals)
• Photo Gallery
• Print version of this specification sheet / brochure
• Application Notes:
  - 2D: Instructions for Care and Cleaning of Conductivity Cells
  - 6: Determination of Sound Velocity from CTD Data
  - 10: Compressibility Compensation of Sea-Bird Conductivity Sensors
  - 14: 1978 Practical Salinity Scale
  - 42: ITS-90 Temperature Scale
  - 67: Editing Sea-Bird .hex Data Files
  - 68: Using USB Ports to Communicate with Sea-Bird Instruments
  - 90: Absolute Salinity and TEOS-10: Sea-Bird's Implementation Plans

Sales Information -- options, accessories, cables, mount kits, spares, etc.

• Configuration options & accessories:
  - Details for SBE 45
  - Listing for all products
• Cables
• Mount kits
• Spare parts
• Other -- De-bubbler (produced by the State University of New York, Ocean Instrument Laboratory; information provided for reference only)

Software -- components of Seasoft V2

• Seaterm -- description, download
• Seasave V7 -- description, download
• SBE Data Processing -- description, download

• SBE 38 -- remote temperature sensor
• SBE 21 Thermosalinograph -- has internal memory and can acquire data from up to 4 auxiliary sensors