Can anyone interpret a Vision download for me

Timbo · 10th July 2007, 19:11

Would anyone be willing to look at an APD log file from my last dive, if i e-mail it to them.
I put 3 new cells in prior to this dive. The following occured.

Cell number 3 during the dive seems to be always lagging behind cells 1+2.
On calibration Cells 1+2 seem to top out at 1.01 and 1.04 respectively.
However Cell 3 only gets to 0.78.
This is the first dive with these new cells.

During the accent cell 3 was always lagging behind cells 1+2. Also it was jumping around, as you looked at the display it would read 1.19 then suddenly jump to 1.25ish.
I increased the PO2 to 1.6 to see if the Cells linearity was okay, all reached 1.6 although cell 3 read the lowest.
I did NOT get any cell errors.
I e-mailed the file to Nicky at APD and she suggested i swap the cells posistion in the unit, to see if the problem moves. The problem i have is i am not due to dive till i take my unit abroad on 4th August. Therefore i would like to know if the cell is okay or not. If you do want to look and think you cn work it out please reply with your e-mail and i will send the APD log file. Obviously you will require the APD softwear as well. Thanks.
Tim B

Timbo · 10th July 2007, 19:23

Captain Nemo · 10th July 2007, 20:49

No warnings , and reaching 1.6 seems ok. Are the cells new and did you let them breathe or fit them straight from the packet. If you cannot dive before your trip it might be an idea to buy some spare cells , or at least one.

Timbo · 10th July 2007, 21:11

No, fitted strait from pack, but were in unit with o2 in for about 24 hours before dive. Will take spares, just the cell did not seam to behave as i would expect

Stewart McMickan · 10th July 2007, 21:28

Can you not mark all 3 cells and there locations then swap them around and carry out a dry run on the unit and breath from it for a couple of minutes and manually inject o2 into the loop and see how the cells react? If they react the same in there new locations then you know that you may have a faulty cell.
This maybe your best option before your holiday.

Patto_chan · 10th July 2007, 22:41

Quote: (Originally Posted by Timbo)

Cell number 3 during the dive seems to be always lagging behind cells 1+2.
On calibration Cells 1+2 seem to top out at 1.01 and 1.04 respectively.
However Cell 3 only gets to 0.78.

I presume these are the cell millivolt readings observed during calibration. According to the Vision manual they should be between 7.5and 13mV so the 0.78 seems very close to the low limit. But if they all reach 1.6 during an O2 flush then they could be OK but I'd bring a spare cell or 2 just in case.

Timbo · 10th July 2007, 22:54

Patto,
Nicky at AP says that the Mv reading on calibration is not a cause for concern!!

jptaylor9 · 10th July 2007, 22:58

Quote: (Originally Posted by Timbo)

Cell number 3 during the dive seems to be always lagging behind cells 1+2.
On calibration Cells 1+2 seem to top out at 1.01 and 1.04 respectively.
However Cell 3 only gets to 0.78.

As posted by Martin on the Inspiration List, low voltage cells last longer...

On my unit C3 gets to 0.85 on calib. while C1 & C3 get to 1.05 & 1.10, not a problem.

On a dive C2 seems to lag C1 & C3 & is mostly voted out...

Not a problem, however, each set of cells seems to have it's own personality....

JT

simon varley · 10th July 2007, 23:05

had something (a bit) similar. I put in three new cells, they calibrated fine and all mV readings were similar and moved at the same rate when flushing. At the start of the dive all three cells were reading very similar, but half way through, cell 2 started reaing low. Consistently low. Towards the end of the dive, the cell 2 reading was again the same as the others.

Swapped cell positions, and the problem went away. It's certainly worth doing this even if you're not diving. If the mV issue moves with the cell, try and get it replaced on warranty. If it stays with the location, check the connector

UKSteve · 11th July 2007, 12:20

Comment about low voltage cells lasting longer may be true...but be aware that if it does not climb above 0.70 for a cell during callibration then you will get a failed calibration followed by "NO DIVE" warning. I had that on one cell after a couple of month's use. Went back to AP for a warranty replacement

C2 commonly lags...esp towards end of a dive in cold water... presumed it is related to condensation...rarely voted out tho..

Steve

10th July 2007, 19:11	#1 (permalink)
Timbo New Member Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: May 2006 Location: Hertfordshire UK Posts: 63	Can anyone interpret a Vision download for me Would anyone be willing to look at an APD log file from my last dive, if i e-mail it to them. I put 3 new cells in prior to this dive. The following occured. Cell number 3 during the dive seems to be always lagging behind cells 1+2. On calibration Cells 1+2 seem to top out at 1.01 and 1.04 respectively. However Cell 3 only gets to 0.78. This is the first dive with these new cells. During the accent cell 3 was always lagging behind cells 1+2. Also it was jumping around, as you looked at the display it would read 1.19 then suddenly jump to 1.25ish. I increased the PO2 to 1.6 to see if the Cells linearity was okay, all reached 1.6 although cell 3 read the lowest. I did NOT get any cell errors. I e-mailed the file to Nicky at APD and she suggested i swap the cells posistion in the unit, to see if the problem moves. The problem i have is i am not due to dive till i take my unit abroad on 4th August. Therefore i would like to know if the cell is okay or not. If you do want to look and think you cn work it out please reply with your e-mail and i will send the APD log file. Obviously you will require the APD softwear as well. Thanks. Tim B __________________ OOER ITS DARK DOWN HERE
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10th July 2007, 19:23	#2 (permalink)
Timbo New Member Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: May 2006 Location: Hertfordshire UK Posts: 63	Re: Can anyone interpret a Vision download for me bump __________________ OOER ITS DARK DOWN HERE
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10th July 2007, 20:49	#3 (permalink)
Captain Nemo RBW Member Current Rebreather/s: Evolution Other Rebreather/s: Not Bought Yet Inspiration Classic Inspiration Vision Evolution Megalodon Sport Kiss Classic Kiss Join Date: Oct 2006 Location: CORNWALL Posts: 55	Re: Can anyone interpret a Vision download for me No warnings , and reaching 1.6 seems ok. Are the cells new and did you let them breathe or fit them straight from the packet. If you cannot dive before your trip it might be an idea to buy some spare cells , or at least one.
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10th July 2007, 21:11	#4 (permalink)
Timbo New Member Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: May 2006 Location: Hertfordshire UK Posts: 63	Re: Can anyone interpret a Vision download for me No, fitted strait from pack, but were in unit with o2 in for about 24 hours before dive. Will take spares, just the cell did not seam to behave as i would expect __________________ OOER ITS DARK DOWN HERE
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10th July 2007, 21:28	#5 (permalink)
Stewart McMickan New Member Current Rebreather/s: Inspiration Vision Other Rebreather/s: Join Date: Mar 2006 Location: ATHLONE Ireland Posts: 39	Re: Can anyone interpret a Vision download for me Can you not mark all 3 cells and there locations then swap them around and carry out a dry run on the unit and breath from it for a couple of minutes and manually inject o2 into the loop and see how the cells react? If they react the same in there new locations then you know that you may have a faulty cell. This maybe your best option before your holiday. __________________ Regards, Stew
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10th July 2007, 22:41	#6 (permalink)
Patto_chan Annoying fish since 1992 Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: Feb 2005 Location: Ireland Posts: 63	Re: Can anyone interpret a Vision download for me Quote: (Originally Posted by Timbo) Cell number 3 during the dive seems to be always lagging behind cells 1+2. On calibration Cells 1+2 seem to top out at 1.01 and 1.04 respectively. However Cell 3 only gets to 0.78. I presume these are the cell millivolt readings observed during calibration. According to the Vision manual they should be between 7.5and 13mV so the 0.78 seems very close to the low limit. But if they all reach 1.6 during an O2 flush then they could be OK but I'd bring a spare cell or 2 just in case.
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10th July 2007, 22:54	#7 (permalink)
Timbo New Member Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: May 2006 Location: Hertfordshire UK Posts: 63	Re: Can anyone interpret a Vision download for me Patto, Nicky at AP says that the Mv reading on calibration is not a cause for concern!! __________________ OOER ITS DARK DOWN HERE
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10th July 2007, 22:58	#8 (permalink)
jptaylor9 RBW Member Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: Feb 2005 Location: London, UK Posts: 316	Re: Can anyone interpret a Vision download for me Quote: (Originally Posted by Timbo) Cell number 3 during the dive seems to be always lagging behind cells 1+2. On calibration Cells 1+2 seem to top out at 1.01 and 1.04 respectively. However Cell 3 only gets to 0.78. As posted by Martin on the Inspiration List, low voltage cells last longer... On my unit C3 gets to 0.85 on calib. while C1 & C3 get to 1.05 & 1.10, not a problem. On a dive C2 seems to lag C1 & C3 & is mostly voted out... Not a problem, however, each set of cells seems to have it's own personality.... JT
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10th July 2007, 23:05	#9 (permalink)
simon varley New Member Current Rebreather/s: Inspiration Vision Other Rebreather/s: Join Date: Jul 2005 Location: geelong, VIC Posts: 34	Re: Can anyone interpret a Vision download for me had something (a bit) similar. I put in three new cells, they calibrated fine and all mV readings were similar and moved at the same rate when flushing. At the start of the dive all three cells were reading very similar, but half way through, cell 2 started reaing low. Consistently low. Towards the end of the dive, the cell 2 reading was again the same as the others. Swapped cell positions, and the problem went away. It's certainly worth doing this even if you're not diving. If the mV issue moves with the cell, try and get it replaced on warranty. If it stays with the location, check the connector
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11th July 2007, 12:20	#10 (permalink)
UKSteve Steve Collard Current Rebreather/s: Inspiration Vision Other Rebreather/s: Join Date: Jul 2005 Location: Weymouth, UK Posts: 601	Re: Can anyone interpret a Vision download for me Comment about low voltage cells lasting longer may be true...but be aware that if it does not climb above 0.70 for a cell during callibration then you will get a failed calibration followed by "NO DIVE" warning. I had that on one cell after a couple of month's use. Went back to AP for a warranty replacement C2 commonly lags...esp towards end of a dive in cold water... presumed it is related to condensation...rarely voted out tho.. Steve Last edited by UKSteve : 11th July 2007 at 12:24.
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