forum.heinrichsweikamp.com

OSTC 2798 updated to firmware 2.20.
Hi during last dive (21 minutes between 58 and 50 meters with air,bottom gas, ean 51 and ean 98 ,deco ; Hig GF 83, Low GF 20); my 2N gives a 1 minute stop at 7 meters,and this is strange, but stranger is the fact that "the minute" is during forever, the ostc didn't give the next step in deco (after 1,5 minutes i decided to change gas and to go at 6 meters);after this the, stops at 6 and 3 meters was managed normally by my 2N.
I did the same dive with same parameters using the simulator and the behaviour has been the same : A stop at 7 meters which never end.
Does anyone observed something similar after the update to 2.2 version.

Thanks.

Fabrizio

Hi have a look in this post. You may have something in there.http://www.heinrichsweikamp.com/read.php?2,7600

Thanks, but the functions CF 56-57-59 -60 are new function (59-60) or related to gas consumption(56-57), after firmware update i've checked the values. Now alla CF has the same value they had before updating (when OSTC behaviour was perfect).

Hi, I've discovered a possible cause of problem;I'm not a firmware developer, so this is only an hypothesis:
I had set the ean 98 switch depth to 7 meter (in this way 2n start blinking for a better gas from 7 meters and not from 6 meter where i have to take te ean 98).
In this condition the 2.20 firmware gives a 1 minute stop at 7 meters which never ends (previously the behaviour was different).
Setting ean 98 switch depth to 6 meters ostc act correctly and gives the stop to 6 meters decreasing the time without enter in previously described state .
Maybe i'm wrong, but it seems like the 2n enter in a loop conditions (or in some state which seems a loop).
I hope this can be useful for developers.


Thanks

Fabrizio Vizzani

Hello,

have you Set CF55 bigger than 0??

Regards Uwe

No, i've not my unit here (unluckly my job doesn't require a dive computer), but i'm sure that additional time for gas switch is set to 0 (in the past i did some test,but finally decided to not use this function) .

Thanks Fabrizio

That's the "problem" we've discovered: regardless what you set in CF55 you'll have a 1 Minute stopp in every gas switch. But only if the gas switch is outside of the known standard stop steps (eg 21/18/15/12/9/6/3m)

Clear, but anyway this minute is not decremented; i don't undestand why i've not faced the same problem at 21 meters switch from air to ean 51.
I think this problem is solved (or work arounded) by setting the gas switch to the deco gas MOD,but the exact behaviour remain a little foggy


Thanks