6m Deco time longer than supposed to be

[Bago]

Hi, I am using Ostc Mk2 with 2.2 version.
OC with GF mode.

When arriving to the 6m deco stop it stays at 1 minute even if I stay there for 4 minutes...
It changes to 5m deco stop only when I switch from nitrox 40 to Oxygen.
is there something wrong, am I missing something, is it supposed to be like this just to force me to change to oxygen ?

[swissdiving]

Hi Bago,

Have you read this thread?
http://www.heinrichsweikamp.com/read.php?2,7909
You might find some answers in there.

[sailor]

Hi,

if CF 55 is set > 0 you will have this behaviour as the OSTC is waiting for the gas-switch.
Set CF 55 to 0 and the deco-calculation will be fine without a gas-switch.

Reiner

[Solodiver]

Update to 2.21 and come back is this not solving your issue...

[Bardass]

canceled

[Bago]

Yes Upgrade to v2.21 fixed the issue.

No errors in deco stops, time shown at each stop was respected and progressed regurarly to the next stop.

Thanks
Bago

[Rebel]

I also have this issue, if I have o2 programmed as an active deco gass (air back gas). If I do not switch to deco gas, the time at 6m does not go down it 'hangs' for much longer than it says. I'm using firmware 2.21 and my OSTC 2N and both of my buddies OSTC's do the same thing. Also I have CF55 set to zero. I presume as the O2 is set as an active (potential) gas the deco obligation displays the o2 profile but continues to calculate based on the air profile in terms of decreasing the remaining deco time (unless I tell it I have made the switch to o2). I would much prefer it shows the profile based upon the actual gas I have told it I am using.