Installation manual

Commission the system | 59
Speed Calibration (SimNet Transducers)
Water speed off set
Water speed calibration is used to adjust the speed
value from the paddle wheel to match the actual speed.
This can be measured either from the GPS speed over
ground (SOG) or by timing the boat over a known
distance. Water speed calibration should be performed
with as little wind and current movement as possible.
Select Auto correct to match water speed to ground
speed
Manual calculation. If in average the water speed reads
8.5 knots and SOG records 10 knots. Increase the off-
set to 117%. The calculation is:
Difference in speed
Paddle wheel speed
x 100.
If water speed is lower than SOG then increase the
calibration value.
Calibration range is 10-400 %, Default is 100 %.