Sea-Bird Electronics SBE 38 Manual de usuario descargar pdf (Pagina 7)

Manual revision 006 Section 2: Description of SBE 19plus V2 SBE 19plus V2

Section 2: Description of SBE 19plus V2

This section describes the functions and features of the SBE 19plus V2

SEACAT Profiler, including system description and auxiliary equipment,

specifications, dimensions and end cap connectors, batteries and battery

endurance, external power and cable length limitations, data storage,

communication settings, magnetic reed switch, and configuration options

and plumbing.

System Description

The SBE 19plus V2 SEACAT Profiler is designed to measure conductivity,

temperature, and pressure in marine or fresh-water environments at depths up

to 7000 meters (22,900 feet). The 19plus V2 operates in two modes:

• Profiling mode for acquiring vertical profiles. The 19plus V2 runs

continuously, sampling at 4 scans per second (4 Hz). It can average up to

32,767 samples, storing and transmitting only averaged data.

• Moored mode for acquiring time series measurements once every

10 seconds to every 4 hours, adjustable in 1-second increments. Between

samples, the 19plus V2 powers down, drawing only 20 microamps.

Self-powered and self-contained, the 19plus V2 features the proven Sea-Bird

conductivity and temperature sensors and a precision, semiconductor, strain-

gauge pressure sensor. Nine D-size alkaline batteries provide 60 hours

operation in Profiling mode; the 64 Mbyte FLASH RAM records 400 hours of

conductivity, temperature, and pressure data while sampling at four scans per

second (other configurations/setups vary). The 19plus V2 three-wire RS-232C

interface provides simultaneous, real-time monitoring. User-selectable output

format is raw data or engineering units, in hexadecimal or decimal form; XML

output is also available. Setup, diagnostics, and data extraction are performed

without opening the housing. The 19plus V2 can power and acquire the

outputs of external sensors.

Logging is started by sliding the On/Off switch, by command via the RS-232

interface, or by applying external power, depending on your instrument setup.

A standard 19plus V2 is supplied with:

• Plastic housing for depths to 600 meters (1950 feet)

• 64 Mbyte FLASH RAM memory

• Internally mounted strain-gauge pressure sensor

• 9 D-size alkaline batteries (Duracell MN1300, LR20)

• Impulse glass-reinforced epoxy bulkhead connectors:

- one 6-pin connector for data I/O, external power, and pump power;

- three 6-pin connectors, for two differential auxiliary A/D inputs each;

- one 4-pin connector, for RS-232 auxiliary sensor (SBE 38 secondary

temperature sensor, WET Labs sensor [single, dual, or triple channel ECO

sensor; WETStar; or C-Star], up to two Pro-Oceanus Gas Tension

Devices, or Aanderaa Oxygen Optode 4330 or 4835)

• T-C Duct, which ensures that Temperature and Conductivity

measurements are made on the same parcel of water

• SBE 5M miniature pump (with plastic housing for depths to 600 meters)

for pumped conductivity; by fixing the flow to a constant rate, the pump

ensures a constant conductivity time response. The T-C duct and pump

combination results in dramatically lower salinity spiking.

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