Simrad SL 30, Manual

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974-25007001/2.0 SL 30/35 Hull Sonar Operators Manual
Page 4.56 Menu and Software Description
Kongsberg Simrad Mesotech Ltd.
Port Coquitlam, BC - Canada
The Calibration results reflect the positional accuracy of the optical sensors in the rotary
scanning heads. Calibration data is not displayed for non-rotation heads such as altimeters
The optical sensors are used to estimate the current rotational angle of the transducer within
the dome. The CW and CCW columns are the detected ClockWise and CounterClockWise
position of the optical sensors with respect to the 0 degree reference marker on the head. The
values are in 0.225 degrees. Theoretically the CW and CCW values should be the same and
at perfect 0, 400, 800 and 1200 (corresponding to 0, 90, 180 and 270 degrees respectively).
However, due to optical sensor mounting errors the positions do not match the perfect counts.
Also due to the optical view field of the sensors, the CW and CCW values are not equal.
Variation between the CW and CCW at each quadrant should be less than 20. Positional
errors of each quad from its perfect value should be less than 35. Values outside these limits
should be reported to Kongsberg Simrad Mesotech or its representatives.
Example:
Ref CW CCW
0 0 1596 normal
90 390 415 abnormal, but operable