B&G H5000 Pilot Computer - Manual (Page 51)

| 51 Sensor calibration | H5000 Operation Manual
Distance reference
This facility enables the user to calibrate the log accurately and simply. Calculations are
performed by the display that works out the boat speed over a known distance.
To calibrate the boat speed via a distance reference you will need to complete consecutive
runs, under power at a constant speed made along a given course and distance.
¼ Note: To eliminate the eff ect of tidal conditions it is advisable to perform at least two runs,
preferably three, along the measured course.
How To Calibrate boat speed via Distance Reference
1 Enter the desired distance in nautical miles that you would like to calculate the distance reference over.
2 When the boat gets to the predetermined starting position of the distance reference calculation start
the calibration timer.
3 As the boat passes marks A and B on each run, instruct the system to start (Start Run) and stop (Stop
Run) and fi nally OK to end calibration (End Cal Runs).
4 After the last run is completed and OK has been selected, Select save to store the calibration.
5 A pop up warning will ask you if you wish to replace the current calibration with the new one. Select Yes
to complete or cancel to not replace the calibration value.
Distance reference diagram
Referring to the diagram, A and B are the markers for each run and X is the actual distance for
each run as measured from a suitable chart.
Start Run 1 Stop Run 1
Stop Run 2
End Calibration
Start Run 2
Start Run 3
A B
X
¼ Note:
It is important to maintain the same constant boat speed over each run.