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Post by FrankP on Mar 4, 2014 0:09:22 GMT -8
The SOS/ScubaPro Decom Meter D.C.P. I recently purchased if definitely not operational.
The meter's Dial has allot of dark flakes of something inside.
Does anyone know if there is an instruction guide to properly disassemble the meter?
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Post by regulator68bj on Mar 4, 2014 0:43:50 GMT -8
Hi Frank,
The only information on the internals I have found are from a German web page will post pix but if images are not allowed the web site is
  www altes.tauchen.seveke de
john |
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Post by FrankP on Mar 4, 2014 15:57:46 GMT -8
John (regulator68bj) thanks for the photos.
They help me see how it is put together.
I just have to find out how to open the front of the meter.
Frank
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Post by nikeajax on Mar 4, 2014 17:02:27 GMT -8
Ummmm, did either of you try to actually read that  It's really eff'ed up: it's almost Engrish:  Can you call it Germlish... Sorry, I just couldn't resist, Jaybird |
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Post by nikeajax on Mar 4, 2014 17:45:06 GMT -8
More from said site:   |
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Post by FrankP on Mar 4, 2014 18:03:13 GMT -8
Does anyone have guidance for the first step in opening the SOS Deco Meter?
The comments provided with the photos help, but were hard to understand.
Does it state that there is a type of adhesive holding the outer most black ring?
Can the adhesive be gently cut without damaging the pressure chamber holding the meter?
There are two tiny holds in the faceplate of the meter, how/when are these to used?
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Post by oldtimer on Mar 5, 2014 11:47:22 GMT -8
Hi Frank, I'm the owner of the said site. There is no problem to open it, see the last picture. There is no adhesive, the rubber ring is only pressed in the case. You have to lever the ring from the case only. If you have any questions don't hesitate... Best regards, Lothar -- www.altes.tauchen.seveke.de |
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Post by nikeajax on Mar 5, 2014 12:32:26 GMT -8
Lothar: thanks! I thought that was the approach, but wasn't sure... Take a nice wide blade slot-tip screwdriver and work your way around: it's held in by compression of the rubber grommet/gasket. It took me all of two minutes!
Jaybird
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Post by nikeajax on Mar 5, 2014 13:20:38 GMT -8
Lothar, so does the lens/crystal have holes in it so as to pry it out with?
Also, should we move this post to instruction and technique, or general?
Jaybird
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Post by FrankP on Mar 5, 2014 16:17:53 GMT -8
Lothar, many thanks for providing the photos and additional clarification.
Jaybird, if this is not the correct location for these posts, please move them as needed.
Frank
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Post by Linda on Mar 5, 2014 17:56:59 GMT -8
Moved!  |
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Post by FrankP on Mar 7, 2014 9:52:36 GMT -8
Did anyone else know that the SOS's "distensible gas filled bag" (PVC Bag) should be filled with Nitrogen (N2)?
If you did, I was in the dark about it.
I have felt that the descriptions, of how the meter worked, had something missing.
This is the missing information.
I found a reference to it being "gas filled" in an article "Theory of evaluation of the single pneumatic resistor decompression computer"; Medical and biological engineering: September 1976, Volume 14, Issue 5, pp 570-579
Then I noticed that the cut-way diagram (light green background), included with the photos of the disassembled unit, has N2 printed on the space for the PVC Bag.
This makes sense to me, as the meter simulates the Nitrogen uptake of a single tissue.
Also, I now see a reason for the little tab/neck at the "bottom" of the PVC Bag.
This would have been used to evacuate the air out of the bag after assembly, followed by the insertion of the Nitrogen and then sealed.
Cool!! Little things like this fascinate me!
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Post by SeaRat on Mar 7, 2014 14:54:50 GMT -8
Hi Frank, I'm the owner of the said site. There is no problem to open it, see the last picture. There is no adhesive, the rubber ring is only pressed in the case. You have to lever the ring from the case only. If you have any questions don't hesitate... Best regards, Lothar -- www.altes.tauchen.seveke.deLuther, I saw in an older publication discussion about "calibrating" this or like meters. Do you have any information on the calibration procedure? Also, I doubt that nitrogen was used, as it is air that the divers are breathing. Do you have information on whether it was nitrogen-filled or simply air filled? Thank you for the information. John |
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Post by nikeajax on Mar 7, 2014 14:58:32 GMT -8
Yeah, I was thinking about that too: our air we breathe is roughly 80% nitrogen, so why would they bother?
Jaybird
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Post by FrankP on Mar 7, 2014 17:09:41 GMT -8
Yes, we breath air at 80/20. But the tissues are exposed to the N2 in our blood stream.
The question is what is the N2 level exposed at the tissue level?
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It's really eff'ed up: it's almost Engrish:
