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CF16 wrongful warning behaviour
Posted: 05 May 2012, 23:31
by DiverM
[quote]CF16:estimated distance to decostop in 0.1m steps
This value sets the estimated distance to the current decompression. Usually, the stop is done below the shown value. This value increases the forecast of the total decompression time.
Recommend range: 10 ... 20 (1m...2m)
Default setting: 10 (1m)
Example: CF16=10 - The decostops are made 1m below the required depth[/quote]
I would expect a warning when set to less than one ( 20).
Currently a warning occurs when set to >10 and no warning is given when set to <10, which, in my mind, is rather silly.
Re: CF16 wrongful warning behaviour
Posted: 06 May 2012, 10:53
by tiefunten
Why is this behavior silly in your opinion? When set to 0, the unit simply shows the real decotime at a given depth without any increase for staying below this depth during deco. But if you set the cf to >10, the TTS that is shown by the unit may increase tremendously. What I don't understand is why a warning occurs in the recommended range (but I think that a deco offset of 2m is too high anyway)!?
Re: CF16 wrongful warning behaviour
Posted: 13 May 2012, 19:15
by DiverM
Silly because you only will get realistic TTS prediction values when this parameter is set between 10-20, ie 1 to 2 meters below stop depth. And because it is within the recommended range the warning occurs.
A setting of 1m below stop depth works for me, but I can imagine that some instructors and dive-masters will find the setting of 2m below stop depth useful. PADI teaches a safety stop at 5m, when diving below 10-15m or so.
But of course you are right to say that a setting >10 is silly when doing technical dives with Nitrox/Trimix.
Re: CF16 wrongful warning behaviour
Posted: 13 May 2012, 19:39
by heinrichsweikamp
DiverM Wrote:
> between 10-20, ie 1 to 2 meters below stop depth.
> And because it is within the recommended range
> the warning occurs.
That's true, 2m should not give you the warning already. I have fixed this (Fixes will be available with the next firmware version that we upload).
> stop depth useful. PADI teaches a safety stop at
> 5m, when diving below 10-15m or so.
The OSTC is intend for decompression diving. Safety stops are highly recommended for any dives but the OSTC does not request one.
regards,
Matthias