Suunto 7 Altitude Issues

freeheeler

@eurohiker
unfortunately unaccessible either.
I bet it is as @Brad_Olwin says. This alti graph on an almost flattish run (june 2nd) follows this covered sensor pattern… and this is why I celebrate the S9P design

freeheeler

@eurohiker
I have to add something more: this steep climb in the beginning: this is not caused by a covered sensor. Normally covering increases pressure and hence alti drops until it’s venting normally again.
But it could be caused by too quick starting of an activity. I saw that on my wife’s S7, too. She went to the start screen and started the activity before the watch was ready and had the satellites locked

eurohiker

@freeheeler Definitely, I agree. I try to wait for a GPS, but sometimes i forget/mid convo, or what ever sh*t happens that’s a user error. That’s not what I’m complaining about though that didn’t double the overall hike altitude or cause the GPS accuracy to be all over the place throughout the whole hike.

That peak design looks amazing but I do love the Suunto 7 design. The watch looks like it’s floating on my wrist due to the heartbeat sensor and my wrist shape/bf%. I never wore a watch in my life but I love wearing this one.
Even winter jackets tuck under until it hits the wall of the heartbeat sensor without me having to do it. At that same tightness I can run my VO2max without it floppying or even moving a mm.

I know it must be annoying seeing me throughout the forums complaining but I have gone the proactive route by making an account here with my own thread explaining my issues in more detail than most people would, opened up RMA cases and got new watches, I have done everything in this thread on at least 1 of the 4 watches. I still have the same issue I started with.
Now for the first time I find out that gps and baro are independent of each other which I thought was the same so I have had 2 issues while thinking it was just 1.

freeheeler

@eurohiker
I briefly scrolled thru the history of this thread… my memory is not like @Mff73
I would recommend the following:

try to wear your watch on the right hand
let your watch soak over night in a glass of water and then clean the sensor hole with a baby toothbrush
report your observations

eurohiker

@freeheeler I have but I will go out and get another baby brush tomorrow and I will report my results on the weekend. Although, it will be mostly flat where i’m going with no real hikes planned.

I really don’t want to wear it on my right but I will for a walk/short hike or something to test it out.

Brad_Olwin

@eurohiker You are fine for complaining….this should not be happening and it is hard to think that 4 watches had this issue. So, let’s see if we can fix it. I wear my watch as you do and I agree it is difficult to see how you could easily cover the sensor. But the spikes show that the air going in and out of the sensor hole, or once inside the chamber is getting pressurized more than the ambient pressure. To detect a 1m change in altitude the sensor must be sensitive. I would suggest wearing the watch on the other wrist or even better, wrap the strap around your hand above your knuckles. If different positions give the same reading then I would believe you have yet another faulty watch. I do know that initially there were some limited baro sensor issues, you have seen on the forum that replaced watches function better. I have a test watch that had no issues and now a purchased watch that has no issues.

Brad_Olwin

@freeheeler We are writing at the same time and giving the same answers:)

freeheeler

@brad_olwin

I go to sleep… now it’s your turn

eurohiker

@brad_olwin I wish i lived near mountains like you so i can do all these tests. I have to wait until the weekend for hiking since North France is pretty flat. I also don’t travel somewhere to hike every weekend so when I get to the hiking spots I don’t really try to test anything and try to take in the moment/views more than anything.
After the hike is when I look at the watch and say holy f that is off, and I don’t bother to analyze it until i’m home at the end of the weekend or a week later.

Brad_Olwin

@eurohiker Next time either wear on the other wrist or try the hand, it is not bad on the hand as the strap keeps the watch secure and it is still easy to read. Let us know what happens when you test.

freeheeler

@eurohiker
you can test this even in a dead flat area. If I recall correctly @Aleksander-H had to test this in the flatlands, too. And our unenviable friends @Dimitrios-Kanellopoulos and @isazi don’t have mountains nearby eithere…

Here’s a bad example of one of my workouts. It was at one single spot. No running, no jumping, just TRX, lunges, dips etc… but I know for sure that during workouts my arm is blocking off the baro holes. I wear my watch pretty loose. Same wearing style as when I go ski touring and mountain biking. I’m glad it happens during workouts only, because I do filter workouts in my QS summary.
…ascent on this single spot: 222m!

Chris Van Sickle

Here’s what I’ve found works, most of the time:

I’ve had 4 Sunnto 7’s as follows:
Bought 1st in winter 2020 -> had to send for RMA/repair that first summer due to dead after swimming w it. Had altitude issues as described by many here.

Replacement watch was fine for awhile, then eventually had altitude issues. Then IT bricked, and had to replace IT under warranty a 2nd time, the 2nd summer.

Bought a 2ndary Suunto 7 so I wasnt without my watch/recording all summer for the 2nd summer in a row. Altitude was fine - but the replacement RMA came back too soon for it to start acting up.

Now 6 months later, the altitude on the 4th watch (2nd RMA) is acting up for the 2nd time. A known 170m ascent loop read 390m yesterday…

The 1st time a few months ago I cleaned it with the baby toothbrush. This time, I tried doing that 3-4 times and it didnt improve things.

My test: watch is on window sill, good GPS, WILDLY jumping up and down in altitude while recording.

***Decided its probably a varying combo of moisture and/or dirt that can affect the baro hole. ***

With that in mind, I put it in the fridge overnight, powered off, after thoroughly and gently cleaning the baro hole with baby toothbrush under running warm water.

Now, watch has been on window sill for 30 mins with 0 ascent, 0 descent - which is night and day from yesterday’s tests which had ~100m up and down within 2 mins.

RECOMMEND: clean baro hold gently with baby toothbrush whenever it starts acting up. If that doesnt fix your alti readings, leave overnight in fridge to wick moisture out.