Sea-Bird Electronics SBE 38 Bedienungsanleitung PDF herunterladen (Seite 15)

Section 2: Description of MicroTSG SBE 45

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.

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 103 104

Keine Kommentare

Sea-Bird Electronics SBE 38 Bedienungsanleitung Seite 15