New Suunto Core giving bizarre total altitude readings

[RandySea]

I never had a problem with my Observer over nearly 10 years. I had to throw it out because there are no replacement battery covers & o-rings so it started to leak. I got a new Core. I had no trouble setting it up. It reads altitude fine. I can calibrate at the start of a hike. For the first 30-60 minutes, the accumulated up and down looks ok. Then it goes crazy.

Today I did a 3 hour hike that should of shown 850’ total. It showed over 8000’ up and down.

When I start a log, at first it seems ok. But by the end of the hike, it has added many thousands of up and down feet to the totals.

The instruction book is no help. Actually, it is virtually incomprehensible. I am glad I could do as much as I have done. But now I am stuck.

Advice welcomed.

[sartoric]

@RandySea
I guess it’s better to contact suunto support. Check the website page

[freeheeler]

@RandySea
that is my favourite topic
you don’t need to get in touch with support for that yet.
try this: wear your watch over some sleeve, longsleeve, buff or anything that separates your moist skin from the watch body and hence the sensor holes in the watch.
I’ve had a core myself and had the same issue. I sent it for service to Finland twice before I learned that I have to avoid the holes to be covered and sealed and hence adds more meters climbed and descended to your totals.
Suunto has a tendency to place the sensor and the holes at unfortunate locations… same with the S9B, but there it is less of an issue, as the holes sit on a tiny boss on the chamfered side of the body. A3PS was the best with its holes hidden under the watch strap where there is the least risk of covering with the moist forearm skin during wrist motion.

maybe a buff or something like that solves this for you, or even loosen your strap by one hole

[A Former User]

ABout the first issue about covers and o-rings,
https://www.deporvillage.fr/rechange-couvercle-de-batterie-suunto-grise?gclid=EAIaIQobChMIr-e4x4Ok6QIVDflRCh0hpwHjEAQYASABEgKuk_D_BwE

https://www.deporvillage.fr/kit-de-remplacement-de-batterie-suunto?gclid=EAIaIQobChMIr-e4x4Ok6QIVDflRCh0hpwHjEAQYAiABEgL15vD_BwE

https://aliexpress.ru/item/32756575851.html

And the o’ring if you go to any hidraulics/pneumatics store they can measure it and you can have it for cents.