Kongsberg EM 2040C, Maintenance Manual

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System description
The EM 2040C is a shallow water multibeam echo sounder based on the EM 2040
technology, an ideal tool for any high resolution mapping and inspection application.
Key facts
• High resolution
• Wide frequency range
• Short pulse lengths, large bandwidth
• FM chirp
• Complete roll and pitch stabilization
• Nearfield focusing both on transmit and receive
• Water column
• Seabed image
• Swath coverage:
– Single head: 130 degrees
– Dual head: 200 degrees
• Depth rating:
– EM 2040C: 50 m
– EM 2040CX: 1500 m
• Easy to install
• Dual swath as option
The receiver and transmitter are integrated in a common sonar head, with the same
dimensions as the EM 3002. The system fulfils the IHO-S44 special order and the more
stringent LINZ specification.
The EM 2040C is available in a CX version where the subsea part has a depth rating of
1500 m for operation on ROV or AUV
Yaw stabilization is available in dual head configuration. Each head uses one sector, and
by independently steering each sector the system can stabilize for the yaw movement
of the vessel.
The operating frequency range is from 200 to 400 kHz with frequency selection in step
of 10 kHz, enabling the user to choose on the fly the best operating frequency for the
application. Due to the very large operating bandwidth available the system will have an
output sample rate of more than 60 kHz. The system will thus effectively operate with
very short pulse lengths, less than 25 microseconds, which gives a raw range resolution
(cτ/2) of 18 mm and an accuracy of less than 10mm (cτ/4).
EM 2040C