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    I'm fine with it Graham it's not keeping me dry!...

    I'm fine with it Graham it's not keeping me dry!

    It does seem like there is a lot of confusion generally if you read the threads, FB page posts and the draft paper prepared by a us instructor.
    ...
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    https://drive.google.com/file/d/1GZk_QWOIKbWOAlBBr...

    https://drive.google.com/file/d/1GZk_QWOIKbWOAlBBrR_IGAF39zsVYfEP/view?usp=drivesdk

    Not sure if the link wil work but this was one of the docs referencing in water linearity checks
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    I agree that 3% seems like a very tight tolerance...

    I agree that 3% seems like a very tight tolerance against a woolly reference point, and I have read that other's accept 5% and in 1 case 10% depending on the dive and with a reduced target set point....
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    Related thread with additional detail on this...

    Related thread with additional detail on this subject if anyone is interested.

    https://www.scubaboard.com/community/threads/cell-linearity-checks.588655/
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    Just for the avoidance of doubt, I was posting...

    Just for the avoidance of doubt, I was posting about linearity checks as opposed to current/voltage limiting checks, in case anyone gets the wrong end of the stick.
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    Trust me I don't need this level of complexity in...

    Trust me I don't need this level of complexity in my diving, too busy working on neutral buoyancy.

    I was just sense checking the seemingly different approaches between us and the US.

    So 1 last...
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    John if you get chance would you be able to read...

    John if you get chance would you be able to read the threads I linked above because I believe I have understood the content but maybe not and a second opinion from someone more learned than me would...
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    Thanks John, but playing devil's advocate and...

    Thanks John, but playing devil's advocate and siding with our American cousins for the purposes of discussion, if the cells were non linear 1.4 might not be 1.4.

    So you do your bench tests and for...
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    Why couldn't that be an o2 flush at 4m say to...

    Why couldn't that be an o2 flush at 4m say to achieve 1.4 Graham, similar to an o2 flush on the bench to 1.0?
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    Actually might have been Paul Raemakers article.

    Actually might have been Paul Raemakers article.
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    Yeah when I read the threads I went back over my...

    Yeah when I read the threads I went back over my KISS manual notes regarding the triples, Kevin Gurrs paper on sensors and Leon Scammahorns article and none referred to this test protocol.

    Not...
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    Thanks for the offer, I'm not convinced myself...

    Thanks for the offer, I'm not convinced myself given the potential for variations depending on loop humidity etc. plus the variables of physiology that have to be considered, if there is a variance...
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    https://www.scubaboard.com/community/threads/were-...

    https://www.scubaboard.com/community/threads/were-you-taught-this-math-in-your-entry-level-ccr-class.551982/page-8
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    https://www.scubaboard.com/community/threads/were-...

    https://www.scubaboard.com/community/threads/were-you-trained-on-oxygen-sensors-with-this-level-of-detail.551920/
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    https://www.scubaboard.com/community/threads/calib...

    https://www.scubaboard.com/community/threads/calibration-question.563965/page-8
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    Maybe I'm not explaining correctly. If we accept...

    Maybe I'm not explaining correctly. If we accept that cell linearity is a reality and that if cells can be non-linear in the range we use, my questions were do divers carry a check list of what...
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    I'll have to reference a relevant reference doc...

    I'll have to reference a relevant reference doc for u.
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    AFAIK any cell is only linear in a given range,...

    AFAIK any cell is only linear in a given range, so long as that loss of linearity is way above our operational set point we don't care, if however the linearity occurs at a lower operating point, it...
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    Thats it, each cell has a reference value in air...

    Thats it, each cell has a reference value in air e.g 7-13mv, so you check it in air, and then extrapolate from there, so if it was 10mv in air it would be:

    10/0.209=47.8 at 1.0

    Then at 1.3 it...
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    I just wanted to resurrect this thread following...

    I just wanted to resurrect this thread following an expansion in my ltd knowledge of cells. It seems relatively common over the Atlantic to use mv as a sense check during a dive.

    So mv at 0.21 are...
  21. Long shot but could it be condensation, where...

    Long shot but could it be condensation, where warm gas meets the heat sink of the valve, which then tracks the zip?

    Alternatively the lads we spoke to on Saturday were explaining that Jason...
  22. Thread: Cold

    by JonG
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    It's warmer underwater and underground but recent...

    It's warmer underwater and underground but recent rains will have dropped even dark world temps.
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    https://www.tdisdi.com/aquacorps/michael-menduno/...

    https://www.tdisdi.com/aquacorps/michael-menduno/

    Legendary
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    https://www.lochalinedivecentre.co.uk/?page_id=144...

    https://www.lochalinedivecentre.co.uk/?page_id=1447

    I know a couple of lads who dived it in the 90s if u need beta
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    Buitenzorg is 90 odd in the Sound of Mull

    Buitenzorg is 90 odd in the Sound of Mull
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