Suunto 7 Altitude Issues
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@aleksander-h
I remember you need to forget the second watch before you can sync the other watch. But I assume you did that.
It would be interesting to know if Suunto Service would either consider your S7 or your SSU faulty… because obviously one must be wrong
living sideways
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@freeheeler there is no way I did a 200 ascent during that walk today, and the graph from yesterday is mildly bonkers.
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@freeheeler and yes, I went through the whole forget thing. I did a 10 second yoga activity on the S7 just now and that came over straight away. Walk never showed up though.
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@aleksander-h
GPS altitude is darker green, right?
Looks like altitude (=baro altitude corrected by fusedalti) is way more than GPS altitude.
Have you tried a fridge test to avoid facing dirty or faulty sensor? -
@mff73 said in Suunto 7 Altitude Issues:
@aleksander-h
GPS altitude is darker green, right?
Looks like altitude (=baro altitude corrected by fusedalti) is way more than GPS altitude.
Have you tried a fridge test to avoid facing dirty or faulty sensor?Yes, dark green was GPS based.
What on earth is a fridge test
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@aleksander-h
https://forum.suunto.com/post/35403
Test fridge = check if baro sensor is changing altitude with just temperature change. = if yes, either sensor is faulty or just dirty. -
@aleksander-h said in Suunto 7 Altitude Issues:
What on earth is a fridge test ?
It is… wait for it… legendary
But I once heard that some alti change causes by temperature change seems to be normal…?!
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40 min fridge test result. No idea what it means
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And a 40 min couch test.
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@aleksander-h
Official fridge test is without recording acitivity. To avoid any fusedalti things . Just to let the sensor behave alone with temperature. -
@mff73 said in Suunto 7 Altitude Issues:
@aleksander-h
Official fridge test is without recording acitivity. To avoid any fusedalti things . Just to let the sensor behave alone with temperature.I knew I’d mess it up
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Interesting observation. Most the graphs I’ve posted here show a sudden jump right at the start of the activity. Is there some calibration jumping in as the activity starts?
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@aleksander-h so the S7 is a bit different than the rest, but the other S family watches at least try to auto calibrate in the first 30 minutes or so of an activity if they get good GPS reception. Probably the 7 does the same.
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@aleksander-h
the first down spike might be from closing the door and the next up spike could be from the warm outside air that entered the fridge is cooling down and hence loose some volume?
the rest looks strange anyway, I would expect the alti to increase more or less linear to the temperature to decrease.edit: found this one in my history book: https://forum.suunto.com/topic/1710/suunto-9-fusedalti-not-remembered-after-activity/30?_=1618778070792
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Anyone know a good barometer app for doing this test on an S7? I’ve found a few, but they all ask for location, which makes me think they’re doing some kind of calibration, which I’m guessing I don’t want.
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Well. This is interesting. I’ve been working my way back in time. Turns out that prior to February 23rd I didn’t seem to have an issue. After that though, I see my numbers getting gradually worse until I reach the point we’re it’s basically doubling my actual ascent. A clogged baro hole getting gradually more clogged perhaps
. It wasn’t untill I went snow shoeing that I noticed the problem as it was really bad that day. I just didn’t work my way far enough back to see that there was in fact a time with no major issues.I’ve already tried running it under the tap. Guess that wasn’t enough. So how best to clean an S7 baro hole without breaking something?
Shouldn’t a blocked baro hole be detected when in for service?
I also have one weird activity on the 13th of February. A 14 km hike which according to.my watch had 0 m ascent. I remember posting about that and being told it was a known bug.
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@aleksander-h said in Suunto 7 Altitude Issues:
Shouldn’t a blocked baro hole be detected when in for service?
fully agree! if you report weird alti observations, service should look into that, too!
the general advice is to soak the watch in a glass of water over night and use a very soft (baby)toothbrush.
my S9B also went nuts some time ago and I did the soaking and sensorbrushing. after that it was fine again
living sideways
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@aleksander-h Sounds very much like my issue. The altimeter was fine the first six months then getting gradually worse to the point where it would record an ascent when I was in fact moving downhill. It went from recording a detailed altitude profile with small ups and downs to a all smoothened out profile with a max altitude that could be a doubling of the real altitude. Service in Finland did a lab test to check the sensor and said there was no problem with the sensor so I did more tests/runs/walks to confirm the issue and sent it back to Suunto, this time HSH Sport in CZ. I’m looking forward to their conclusion.
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@freeheeler I gave it a quick brush this morning. Did another a fridge test now. The baro app I found shows within 1 m of when I put it into the fridge. Wondering if maybe this helped. Of course, no idea if the app is only using the barometer, but I assume so as the altitude reading seems to be in real-time. It’s jumping up and down constantly on the decimal digits, so it seems to be using pressure. Stays within 1 m on the reading which is promising.
I’ll try and find time for a walk later today.
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@aleksander-h
like @freeheeler said, i would do the best sensor cleaning you can (in warm water long time, rince under tap, and do it a couple of time to be really sure). Make sure water comes into the holes, and go out after rincing (an old advice from masters of rincing
: gently tap the watch on a towel, facing holes to the towel : it may help water going out).
And if nothing change, Suunto support again.
