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Matthias,

would you like any more data to be convinced of the issue? or you are
already convinced and scheduling a bugfix?

Thanks and regards,
Xavier

Richard, spot on! you're right 1bar = 1.0197Kg/cm2 , therefore:

a 10m column of fresh water weights 1Kg
1Kg/cm2 -> 0.9804 bar

so, according to Matthias' statement "In the OSTC 1bar pressure increase equals 10m depth if salinity is set to 1.00kg/l" identifies the problem.

the correct ...

Thank you Matthias for the precision. But let me ask: Have you really verified on v1.90 that "In the OSTC 1bar pressure increase equals 10m depth if salinity is set to 1.00kg/l"? I don't have access to a pressure chamber but my field tests prove this wrong..

Regards,
Xavier

Hi tiefunten, sorry but that, I think, wishful thinking... (no offense!) It is not an HelO2 I am comparing to but also 3 other gauges and event the exact same OSTC with v1.8

The problem I report is not HW related. It is a SW change introduced somewhere between v1.8 and v1.9 that over-corrects depth ...

Hello Again,

I have tested again on sweet water, this time against a new Mares Icon set to sweet water and a Suunto HelO2 with default salt water calibration. The OSTC, set to sweet water, is giving me shallower readings. Same depth readings, or slighly shallower, than the HelO2. So those are ...

Thank you Matthias for your thorough response!

I am satisfied with your comments except with the first one "The 1.90 reading is more accurate.". I have compared different depth meters against v1.90 and I have the impression that readings are lower than they should be. Example:

dive in sweet water ...

I enjoy very much the new logbook viewer and the future decotime features in v1.90 but I am worried about some changes in behaviour:

- the depth calculation has changed. I dive in sweet water and in v1.80 I always had a bit more depth than my other computer that is fixed at sea water. Now, since I ...

I is weird/worrying: I made another dive and this time it worked out. I had the
minutes counting. Even after all desat was completed... I will keep trying and
report back...

Olibert

Hi,

I upgraded to 1.90 and I see something weird with the "Surface Interval".
Try this a few minutes/hours after you complete a dive:
- the ostc is 'sleeping'. you wake it up and circle with
the RIGHT button until the "Surface Interval" is displayed.
For me it always starts at 00:00 and ...

Hello OSTCers,

Is there a way to find out the average depth of a dive in the logbook? I am
used to other computers showing this info and I am missing it here.. I'm sure
you know it is very useful to calculate your average consumption during the
dive... I recall seeing the info on-screen during ...

Hi Guys, thanks for the quick responses! I can tell there's a lot of passionate
divers here...

Well, 250% it seems a lot from today's reasonable point of view. But not long
ago the max PPO2 was 2.2 and the permitted time at PPO2=1.6 was 180 minutes
instead of 45' today. So, back then they had ...

Hi everyone,

I'm brand new to OSTC and this forum. So please excuse my style if
not adequate... First of all: I am impressed with the way the mk2
v1.80 looks and dives. Wonder why it took me so long to buy this
computer. Nice piece of technology and art...

One question/suggestion:
I realized ...