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Click the icon to download the SBE 49 manual.
The SBE 49 FastCAT is an integrated CTD sensor intended for use as a modular component in towed vehicles, ROVs, AUVs, or other autonomous platforms that can supply DC power and acquire serial data. FastCAT’s pump-controlled / TC-ducted flow feature minimizes salinity spiking, and its 16 Hz sampling provides very high spatial resolution of oceanographic structures and gradients.
FastCAT’s temperature thermistor and conductivity cell are the same as used in our premium 911plus CTD system, while its pressure sensor (offered in seven full scale ranges from 20 to 7000 dbars) is the superior, micro-machined, silicon strain-gauge recently developed by Druck, Inc. Sophisticated interface circuitry provides very high resolution and accuracy.
FastCAT is an easy-to-use, light, and compact instrument ruggedly made of titanium and other low-maintenance (plastic) materials; it is well suited to even the smallest vehicle. There are straightforward commands for continuous (full rate or averaged) or single sample acquisition. EEPROM-stored calibration coefficients permit data output in ASCII engineering units (degrees C, Siemens/m, decibars, Salinity [PSU], and sound velocity [m/sec]), or the user can select raw data output if desired. A Windows terminal program, SEATERM, is supplied for instrument setup, status display, and diagnostics.
FastCAT must be externally powered, and its RS-232C data logged or telemetered by the vehicle to which it is mounted. As FastCAT does not support auxiliary sensors, where such sensors are required the user's vehicle must be equipped to acquire their signals independently.
CONFIGURATION
A FastCAT is supplied with:
SAMPLING MODES
FastCAT has two sampling modes:
Autonomous sampling – FastCAT runs continuously and samples at sixteen scans per second (16 Hz). It can be set to average up to 255 samples, transmitting only the averaged data. FastCAT can be programmed to begin autonomous sampling when power is applied or on command
Polled sampling – On command, FastCAT takes one sample and transmits the data.
SPECIFICATIONS
| Measurement Range | Initial Accuracy | Typical
Stability (per month) |
Resolution | |
| Conductivity (S/m) |
0 - 9 | 0.0003 | 0.0003 | 0.00005 (oceanic
waters; resolves 0.4 ppm in salinity)
0.00007 (high salinity waters; resolves 0.4 ppm in salinity) 0.00001 (fresh waters; resolves 0.1 ppm in salinity) |
| Temperature (°C) |
-5 to +35 | 0.002 | 0.0002 | 0.0001 |
| Pressure | 0 to 20 / 100 / 350 / 1000 / 2000 / 3500 / 7000 meters | 0.1% of full scale range | 0.004% of full scale range | 0.002% of full scale range |
Power Requirements: standard 9-24 VDC, optional 12-28 VDC.
3.5 Watts
at 9 - 28 VDC; 0.8 Watts pump off
Housing Material: 3AL/2.5V Titanium
Depth Rating: 7000 meters (22,900 feet)
Weight:
In air 2.7 kg (6 lbs)
In water 1.4 kg (3
lbs)
Product Configuration Options & Accessories
Last modified: 24 Jan 2002
Click the icon to download the print version of the specification
sheet in Adobe Acrobat .pdf format.
