Dr. Lecter
Contributor
RonR, any possibility of getting a gauge mode in a future firmware update?
Atomic Aquatics Cobalt Dive Computer
- Thread starter Gbud
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Downing
Contributor
z00ropa
Registered
I just got a Cobalt and hooked it up. The tank pressure reads about 300 psi less than my pressure SPG. My SPG might be a few psi off, but not 300. Any suggestions?
RonR
Contributor
If you can take it to a shop with a calibrated gauge and have them check it, that's what I would recommend. The Cobalts are calibrated at the factory against a variety of pressures, and should be within about 10-15 psi- the limit of the accuracy of the sensor. The gauge on the Cobalt can be easily re-calibrated by the dealer if it needs it- I can provide instructions if necessary. It does require an accurate pressure gauge to calibrate against, though. A typical diving SPG won't have the resolution.
At what pressure is the SPG showing the 300 psi difference? It's fairly common for analog gauges to not be all that linear- i.e. zero might be spot on, but 3000 psi off by 10%.
The safety reserve is just the amount of pressure you want to arrive at the surface with- it will affect your gas time remaining calculations, but the pressure displayed should always be accurate. Changing the safety reserve won't change the pressure display.
Ron
z00ropa
Registered
My SPG reads a tad over 3400 psi (which is pretty accurate, I filled the tank myself), the Cobalt is reading 3180, not 300, but 220, still quite a bit off. I bought it from House of Scuba, via Amazon.com so going to the dealer isn't really an option, but I can get access to an accurate pressure gauge.
RonR
Contributor
If you can get access to an accurate pressure gauge (as a shop might have in their repair department, one that has a big enough dial to resolve 15-20 psi at least) then I would check against a variety of pressures- full tanks, and nearly empty. If the Cobalt is off at any point it can be calibrated against the gauge. Atomic may prefer to do this if there isn't a dealer who can, for liability reasons- I will have to check with them. It would not take much variation on temperature to change a full tank reading by 200 psi.
Ron
JoeCIB
New
Ron, from wha I can see ontis post you seem to be the go to guy for Cobalt software issues. I hope you can help me. I have used the DC for just over a year and have not had any problems until I updated to 1.17. Since then I have not been able to download my dives either to the Cobalt log book or Divelog 5.0. I removed 1.17 and have flashe 1.13 but I can't get it to download anymore. Can you let me know what I need to do? Thanks.
RonR
Contributor
This is a problem some people had with 1.17, and it relates to the Windows drivers. The new Windows software that Atomic will be posting uses a newer driver. Not being able to download with 1.13 is a little puzzling, unless the driver switching (between the Atomic software and Diving Log 5.0) is not happening correctly.
If you PM me with your email I will send you some software to try, I would be interested to know if it fixes the problem- it has for a few others who have experienced this issue.
Ron
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