Strange behaviour for the compass

[Motardplongeur]

Hello

Deciding to verify the compass of my Sport ; I calibrate it 3 times by turning slowly each axe during 20 seconds (without any metal part around). OK, it gives me 3 times the same result. But :

a) A gap of approx 10° compared to an other (well calibrated) compass

b) Each time I push the left button to "take a cape", the indication changes from the targeted direction to something which is approx 100° less (targeted 200°, I push and I read 100°) ; keeping this 100° slot till the button is pushed ; going back to the direction after release it !
This 100° gap is less with South direction ; moreless 50°

It looks like you use magnetic button and the south pole of the magnet influence the compass sensor.

Sport #12002 with V10.25

Edit : low battery at 25% (I'll change it just before next dive) ; maybe an influence ?

Any idea to solve this issue ?

[heinrichsweikamp]

Hello,

The buttons are moving magnets - so: Yes, this influences the course. It's minimal and acceptable when the screen is in the normal position. If you have flipped the screen in the menu (To have the buttons on the topside) this effect is indeed much bigger because the sensor is closer to the (normal) left button then to the right.

regards,
Matthias

[Motardplongeur]

I did not change the screen compared to the buttons ; it's in the "normal" position (as presented on your web site or every where in the manual).

Note : tests have been done in the surface mode menu

[Motardplongeur]

New information :

I changed the battery (old LS14500 to new LS14500) a few days ago and tested again :

There is still a small deviation (moreless 20°) of the compass between button pushed on or not but the memorized position is the one before pushing (so, the good one).

Button sensitivity is 60% (I don't know if this setting is working on Sport) and magnetic sensor is 230 LSD/Gauss ; I didn't change them but Soft is now 10.26

Any explanation about the smaller deviation between low bat/10.25 & high bat/10.26 ?

Just to understand.

Thanks.

[heinrichsweikamp]

Flipped or normal screen orientation?

Regards,
Matthias

[heinrichsweikamp]

heinrichsweikamp Wrote:
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> Flipped or normal screen orientation?

Ok, assuming still normal position. The heading varies with the buttons, of course (They are moving magnets). But: When you confirm the heading you do so with the right button and this button has no or only little influence on the compass. I just tested this here with a "Sport": When properly calibrated the heading can be set without shifting the reading more then a few ° (Like 3-5).

regards,
Matthias

[tanomogi]

Not related true north behavior?(reference of your 'well calibrated compass')
How about using mechanical compass?