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Section 2: Description of MicroTSG
SBE 45
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Section 2: Description of MicroTSG
This section describes the functions and features of the MicroTSG, including:
•
System description
•
Specifications
•
Dimensions and connector
•
Sample timing
•
Baud rate, cable length, and power requirements
•
Optional remote temperature sensor
System Description
The SBE 45 MicroTSG is an externally powered, high-accuracy, conductivity
and temperature monitor, designed for shipboard determination of sea surface
(pumped-water) conductivity and temperature.
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 acquisition
and display, 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 (sleep) state automatically.
Calibration coefficients stored in EEPROM allow the MicroTSG to transmit
data in engineering units. 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. A plastic cup with O-ring retainer at one end of the cell retains the
expendable AF24173 Anti-Foulant Device.
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Содержание SBE 45 MicroTSG
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Страница 98: ...CALIBRATION SHEETS SBE 45 Temperature Calibration S N 0402 1 SBE 45 Conductivity Calibration S N 0402 2 95 ...
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