Atomic Cobalt or Oceanic ProPlus 2.1 ??

[RonR]

But apparently none of them ever asked, "Hey, Ron. Where's the sleeve for this thing?". :mooner:

Believe it or not, no. They probably just assumed we had it covered.

Btw, any news re: ZAGG?

Not yet, I'll post what I find out here.

 

[RonR]

A more serious question I would prefer the remaining bottom time to be larger than the no deco time. Is that something that can be programmed- say to switch the dispay around a bit?

Space is really tight in that part of the display when PO2 is showing. We're always looking at tweaks, though, and the small numbers we would like to get bigger. We could possibly have a bigger size when using air- when PO2 is not displayed. Adding the comment to our requests, thanks.

 

[Akimbo]

... The HP sensor spec is ±.4%, though the rest of the circuitry will introduce some additional error. We only display tank pressure to the nearest 10 psi to keep values from bouncing around in a distracting fashion. ...

This reminds me of an experience that may be of use. I was working with a high preci$ion electronic pressure indicator when they were new to the market. The specs indicated ±0.05% of full scale and a sample rate of 100 times a second. It was special ordered to displayed in 1/10th Atmospheres Absolute. We were using it for partial pressure mixing deep mix offshore, like 1% HeO2. We soon saw the display jump 1-2 Atmospheres every few seconds. We knew darn well it could not possibly change more than 5 PSI/second, let alone 30 PSI in 1/100th of a second!

After reaming out some marketing weenie in the States over a marine radio for several minutes we were transferred to an engineer. “Oh, it does have a 100/second sample rate, but we average it over 500 cycles to stabilize the display.” Needless to say we sent that POS back for a refund.

Indicating that the Cobalt displays 10 PSI resolution in the manual may save some tech support time and customer’s lost confidence. People tend to have higher expectations of precision with digital displays than analog, usually to the resolution of the display.

I know that seeing pressure drop in 10 PSI jumps would not make me feel good. In this case, it may be better to average readings over a few seconds rather than round to 10 PSI increments. It would be ever more weird to watch the pressure go up! Since 0.4% of 3000 PSI is 12 PSI, the likelihood of that happening is high.

 

[Downing]

Believe it or not, no. They probably just assumed we had it covered.

Touché!

Well done, my friend.



Can you maker smaller numbers bigger via a software update or would be this something to consider in future models? One of the best features of the Cobalt is the way the numbers leap off the screen, but bigger is always better as far as my aging eyes are concerned. I wouldn't want making some numbers bigger to come at the expense of making other numbers smaller, though.

 

[RonR]

Indicating that the Cobalt displays 10 PSI resolution in the manual may save some tech support time and customer’s lost confidence. People tend to have higher expectations of precision with digital displays than analog, usually to the resolution of the display.

I know that seeing pressure drop in 10 PSI jumps would not make me feel good. In this case, it may be better to average readings over a few seconds rather than round to 10 PSI increments. It would be ever more weird to watch the pressure go up! Since 0.4% of 3000 PSI is 12 PSI, the likelihood of that happening is high.

Well, you see the issue exactly. Cost is the other part- much higher precision sensors are available, but not at a price that would work for the recreational scuba market. Not yet, anyway- things are always getting better.

In practical terms, for what most people are doing, even 30- 50 psi or so would be plenty of accuracy at the top, so long as it was quite close at the low end of the scale, say below 1000 psi. Most are concerned with how much is in their tank, not with mixing. Averaging over time works best for consumption calculations, and that's what we do.

I remember an instructor, when we were starting this project, showing me proudly how his XXX computer displayed air pressure in 1 psi increments, which he could watch go down in a dive. I didn't have the heart to tell him it was all a software trick- the sensor and circuitry had nowhere near that resolution, whatever his display said. Part of the reason we only show 10 psi is that it's more honest.

 

[RonR]

Can you maker smaller numbers bigger via a software update or would be this something to consider in future models?

If we can figure out how to do it effectively it could be done through a software update.

 

[Akimbo]

Well, you see the issue exactly. Cost is the other part- much higher precision sensors are available, but not at a price that would work for the recreational scuba market. ...

Sure, which is why explaining it in the manual/online is the most cost effective solution to limit disappointed or confused customers. It isn’t hard to understand the dilemma, just that most people don’t have a reason to consider the implications.

 

[DiverPrince]

im wondering if you were to purchase the cobalt, what back up computer would match this console...? i was thinkin of the mares Nemo Wide for the wrist.. please share you 2cent guys.. thanks