Plevier
Active member
I wonder if someone can shed light on the behaviour of my ST60 wind dial?
It used to show about the same on both tacks but then it drifted so that close hauled on one tack was showing 30 deg (apparent) and 60 on the other. Now it's gone further and is nearer to 0 and 70!
However if I go into calibration mode and check the straight ahead position (see stages 3 and 4 in the instructions below) it is correct. (Stage 4 says "sail directly into the wind" I find the engine helps at this point
)
I am confused about stage 2 in the instructions below - making two complete slow circles. It doesn't read as though you need to be in calibration mode for that. Does it mean it is supposed to be done every time the instrument has been disconnected, i.e. every time I take the boat out, or is it just when it's brand new?
BTW it's a normal unit not a Rotavecta.
Thanks.
Extract from Raymarine instructions:
Linearizing and aligning the wind transducer
This procedure ensures that the sensors in the windvane transducer are correctly
calibrated to record rotation of the windvane, then compensates for any small
errors which may exist in the alignment of the wind transducer.
To do this:
1. Power-up the ST60 Wind instrument.
2. Slowly turn the vessel through two complete circles. This procedure automatically linearizes the windvane. A successful linearization is indicated by the digital display flashing and the buzzer sounding three beeps.
3. Hold down the disp and true/app keys for approximately 2 seconds to enter
User calibration then use the disp key to select the wind angle screen (see the
User calibration flow diagram).
4. Sail directly into the wind and adjust the analog pointer to zero, using the
vmg and tack keys. If you are unable to achieve the required degree of accuracy due to sea conditions, and errors become apparent during subsequent
tack operations, repeat this procedure to achieve alignment accuracy
It used to show about the same on both tacks but then it drifted so that close hauled on one tack was showing 30 deg (apparent) and 60 on the other. Now it's gone further and is nearer to 0 and 70!
However if I go into calibration mode and check the straight ahead position (see stages 3 and 4 in the instructions below) it is correct. (Stage 4 says "sail directly into the wind" I find the engine helps at this point
)I am confused about stage 2 in the instructions below - making two complete slow circles. It doesn't read as though you need to be in calibration mode for that. Does it mean it is supposed to be done every time the instrument has been disconnected, i.e. every time I take the boat out, or is it just when it's brand new?
BTW it's a normal unit not a Rotavecta.
Thanks.
Extract from Raymarine instructions:
Linearizing and aligning the wind transducer
This procedure ensures that the sensors in the windvane transducer are correctly
calibrated to record rotation of the windvane, then compensates for any small
errors which may exist in the alignment of the wind transducer.
To do this:
1. Power-up the ST60 Wind instrument.
2. Slowly turn the vessel through two complete circles. This procedure automatically linearizes the windvane. A successful linearization is indicated by the digital display flashing and the buzzer sounding three beeps.
3. Hold down the disp and true/app keys for approximately 2 seconds to enter
User calibration then use the disp key to select the wind angle screen (see the
User calibration flow diagram).
4. Sail directly into the wind and adjust the analog pointer to zero, using the
vmg and tack keys. If you are unable to achieve the required degree of accuracy due to sea conditions, and errors become apparent during subsequent
tack operations, repeat this procedure to achieve alignment accuracy
