SeaCAT C-T Recorder (P optional)SBE 16plus-IM V2 (Inductive Modem)
SeaCAT C-T Recorder (P optional)
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SUMMARY
DESCRIPTION
The SBE 16plus-IM V2 (Version 2) SeaCAT is a high-accuracy conductivity and temperature recorder (pressure is optional) with built-in Inductive Modem. Compared to the previous 16plus-IM, the V2 incorporates an electronics upgrade and additional features, with six differentially amplified A/D input channels, one RS-232 data input channel, and 64 MB FLASH memory. Data can be output in XML as well as ASCII and HEX formats.
The Inductive Modem (IM) system provides reliable, low-cost, real-time data transmission for up to 100 IM-enabled instruments using plastic-coated wire rope (typically 3 x 19 galvanized steel) as both the transmission line and mooring tension member. IM instruments clamp anywhere along the rugged mooring wire. Expensive and potentially unreliable multi-conductor electrical cables with fixed position underwater connectors are not required. IM moorings are easily reconfigured for changing deployments (positions changed or instruments added or removed), by sliding and re-clamping instruments on the cable. IM systems are much less expensive and more power-efficient than acoustic modems, and offer reliable communication over greater distances.
In a typical mooring, an Inductive Modem Module (IMM) or Surface Inductive Modem (SIM) housed in the buoy communicates with underwater IM instruments and is interfaced to a computer or data logger via an RS-232 serial port. The computer or data logger (not supplied by Sea-Bird) is programmed to poll each IM instrument on the mooring for its data, and send the data to a telemetry transmitter (satellite link, cell phone, RF modem, etc.). The 16plus-IM V2 saves data in memory for upload after recovery, providing a data backup if real-time telemetry is interrupted.
The SBE 16plus-IM V2 uses the same temperature and conductivity sensors (and optional strain gauge or Digiquartz® pressure sensors) proven in 10,000 SeaCATs and MicroCATs. Sea-Bird’s unique internal-field conductivity cell permits the use of expendable anti-foulant devices, for long-term bio-fouling protection.
Calibration coefficients are stored in memory, permitting data output in ASCII engineering units (degrees C, Siemens/m, decibars, salinity [PSU], sound velocity [m/sec.], etc.). The sample interval, ranging from 10 to 14,400 seconds, is user-programmable in 1-second increments. Between samples, the 16plus-IM V2 powers down, drawing only 140 microAmps. Alkaline D-cells provide power for approximately 290,000 samples of C and T, depending on the sampling and telemetry schedule. Six differentially amplified A/D input channels and one RS-232 channel provide conditioned power (500 mA) for, and obtain data from, optional auxiliary sensors (oxygen, turbidity, fluorescence, etc.).
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CONFIGURATION, OPTIONS, AND ACCESSORIES
A standard SBE 16plus-IM V2 is supplied with plastic housing for depths to 600 meters, 64 Mbyte FLASH memory, alkaline batteries, glass-reinforced epoxy bulkhead connectors, and expendable anti-foulant devices.
Options and accessories include:
SOFTWARE
The SBE 16plus-IM V2 is supplied with a powerful Windows software package, Seasoft© V2, which includes programs for communication and data retrieval, and data processing (filtering, aligning, averaging) and plotting of CTD and auxiliary sensor data and derived variables.
SPECIFICATIONS
Dimensions in millimeters (inches)
| Measurement Range | Initial Accuracy | Typical Stability | Resolution | |
| Conductivity (S/m) | 0 - 9 | ± 0.0005 |
0.0003 S/m/month |
0.00005 typical |
| Temperature (°C) | -5 to +35 | ± 0.005 |
0.0002 °C/month |
0.0001 |
| Pressure (optional) -- Strain-Gauge | 0 to 20 / 100 / 350 / 600 / 1000 / 2000/ 3500 / 7000 meters | ± 0.1% of full scale range | 0.01% of full scale range/year | 0.002% of full scale range |
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Pressure (optional) -- Quartz |
0 to 20 / 60 / 130 / 200 / 270 / 680 / 1400 / 2000 / 4200 / 7000 / 10500 meters | ± 0.02% of full scale range | 0.02% of full scale range/year | Depends on sample integration time; consult factory |
Memory: 64 Mbyte non-volatile FLASH memory
Data Storage:| Recorded Parameter | Bytes/Sample |
| T + C | 6 |
| Pressure -- strain-gauge or Quartz | 5 |
| each external voltage | 2 |
| auxiliary RS-232 sensor | sensor dependent |
| date and time | 4 |
Real-Time Clock: 32,768 Hz TCXO accurate to ±1 minute/year
Internal Batteries: 9 alkaline D-cells
Battery Endurance 1:
CT only: 290,000 samples
CTD only: 200,000 samples
CTD & 5M pump: 110,000 samples
1
With Duracell MN 1300 cells. Dependent on sampling scheme.
Auxiliary Voltage Sensors:
Auxiliary power out: up to 500 mA at 10.5 - 11 VDC
A/D resolution: 14 bits
Input range: 0 - 5 VDC
Depth Rating, Housing, and Weight:
| Depth Rating | Housing Material | Weight in air | Weight in water |
| 600 m (1950 ft) | acetal copolymer plastic | 9 kg (20 lbs) | 4 kg (9 lbs) |
| 7000 m (22,900 ft) | 3AL-2.5V titanium | 17 kg (38 lbs) | 12 kg (27 lbs) |
| 10500 m (34,400 ft) | 6AL-4V titanium | ||
ADDITIONAL INFORMATION / LINKS:
Documentation -- manual, photos, technical papers, application notes, etc.
Sales Information -- options, accessories, cables, mount kits, spares, etc.
Software -- components of Seasoft V2
Links to Other Instruments of Interest
![[HRule Image]](../../images/div.gif){kind=small}
Specifications are subject to change without notice.
Sea-Bird Home Phone: (+1) 425-643-9866 E-mail: seabird@seabird.com
