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APPENDIX A Technical specifications
Page 30
Table 7: 490 technical specifications (cont.)
Environmental characteristics
Temperature
Standards
Electrical characteristics
Manual controls
Gain
Clutter
Signal level
Noise limiter
White level
Range
Advance speed
Depth units
Installation calibrations
-25°C to +60°C operating temperature
-55°C to +90°C storage temperature
Waterproof, sealed design meets the following:
EN60529 IP65; EN60945 emissions; CE
10 to 30 VDC, 8 Watts, reverse polarity and
overvoltage protection
Transducer outputs protected against open circuit/
short circuit
0 to 75 db
0 to 9
0 to 5
ON/OFF
Background color
up to 2400 feet (800 meters)
1/8 to 2/1
Feet, meters, fathoms
Speed, temperature, gain, transducer depth/offset
490 INSTALLATION MANUAL, Revision B2
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