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AQUAmodem 500 Overview
The AQUAmodem 500 series represents a breakthrough in low cost underwater communications. Perfect for long-term, multi-point condition monitoring, the system combines the proven data acquisition capabilities of Aquatec Subsea's AQUAlogger underwater instrumentation with a low-power acoustic transmission system. At the surface is a standard AQUAmodem receiver unit that decodes the data signals transmitted from multiple subsea units.
Subsea units may be configured with any of the standard AQUAlogger sensors, such as pressure, temperature, etc. They are factory programmed to measure and transmit the data at a regular rate, from once every few seconds, to once every few hours. They may also be programmed to change update rate on crossing a certain trigger level.
Every unit transmits its unique identity code as part of the message. Data is also transmitted in such a way that data packet collisions in a multi-unit system are avoided.
AQUAmodems exist in user specific form, such as the 500 series, or they can be
provided as standalone units to enable any Aquatec instrument to be attached, or
alternatively your own logger. This provides a way of monitoring data remotely
from any of our instruments.
| ENVIROMENTAL |
Operating Depth |
200m |
| Temperature |
Operating: 0°C to 40°C
Storage: -10°C to 65°C |
| Shock |
Up to 20g, depending upon housing |
| TELEMETRY |
Frequency band |
27--31khz |
| Transmission type |
PPFMC |
| Error coding |
Reed-Solomon |
| Bit rate |
25--100bps |
| DATA ACQUISITION |
Available Sensors |
Pressure up to 600 bar, temperature, contact Aquatec for other configurations |
| Resolution |
0.2% of full scale range |
| Accuracy |
0.5% of full scale range |
| Transmission Rate |
Pre-programmed interval 2s upwards |
| SURFACE UNIT |
External control |
USB 1.0 and RS232 or RS485 |
| Dimensions |
620mm (24.4") long, 100mm (3.9") diameter |
| Battery |
Rechargeable NiMh, 20 hours operating life |
| SUBSEA UNIT |
Dimensions |
113mm (4.4") long, 52mm (2.0") diameter |
| Housing |
ABS Plastic and Stainless Steel |
| Battery life |
Typically 5 years at hourly update rate |
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