VR3 issues

PCDiver

Hi all,

on my last trip we noticed the following issues with the VR3.

When we dove in VPM-B mode the deco times are way longer than in Buhlmann mode. On the last dive my wife entered the RIB, 20 minutes after the rest and said: VPM-B, what VPM-B, this is VPM-Bullsh1t.

The other thing I noticed are jumps in depth indication during the deco stop. The VR3 shows the same depth and suddenly jumps one or two meters. Very strange. Has anyone seen this?

Thanks,

Peter

decoweenie

I have heard this from others as well.

Someone posted that it wasn't exactly VPM-B algorithm that was implemented, but rather a combination of VPM-B and Buhlmann shallow portion combined...

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Dave Faye

I did two 80 meter dives last week using the my VR3 in VPM mode. I did notice substantially longer deco times. Since I had several deeper stops, my TTS continued to climb for the first 15 minutes of my deco leaving me with lots of shallow hang time too.

I did not notice any jumps in depth.

PCDiver

Did you contact Delta-P about this? My wife noticed exaxtly the same thing. She was diving OC. Her buddies had VR3's without VPM-B. She did one deep stop with the other guys and her VR3 added 15 minutes to her TTS. Dives were in the 40 to 60 meter range.

Pat Coughlan

I was fortunate enough to get a hold of a colour screen vpm-b vr3 for a series of 3, 85m dives of a 20-25 minute duration, I ran hard tables using v-planner b/e +2 cons., boy was I dissapointed with the vpm vr3 I was running 20 minutes extra deco compared to the standard vr3 and this time extended and I got shallower. The stops required by the vpm unit didnt tally with the tables requiring more and deeper stops of differing times so I just ran tables and used them as very expensive dive timers!

My ten cents worth is the colour screen rocks and worth parting with my hard earned cash for but the the vpm-b isn't

Cheers Pat

PCDiver

The color screen is really cool. Easier to read as well. I hope that the VPM-b issues get resolved because it is not usuable for the moment. I contacted my vendor and he will check with Delta-P. I'll keep you all posted on progress in this matter.

Peter

Dave Faye

At least we can switch back and forth between VPM and the standard VR3 Buhlmann.

Mark Chase

Yes but thats a lot of money to pay for something that doesn't work

Thanks for airing this as i was considering sellig both my Bhulman VR3s and getting one new VPM one to run with my Hammerhead.

The Hammerhead is giving me similar TTS (on 25/85GF) as the VR3 but the added stops on the HH are pushing the VR3 to extend the deco in the shallows. I had hoped the VPM would overcome this.

I am seriously considering a Sheerwater as an alternative to the VR3 and I am looking forward to seeing one on my dive on Aug4th.

ATB

Mark Chase

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decoweenie

The software on the Shearwater has always worked very well dating back 2 years ago to the KISS-Shearwater prototypes.

Now Bruce put it in a different housing that is absolutely bomb-proof. Drysuit divers won't feel the size, but wetsuit divers might think that it is big eventhough the overall dimension is supposedly the same size as the VR-3.

Batteries last more than 1 dive , or more like 1 year based on Bruce's estimate.

You will like the buttons much more than the VR-3. There is no on-screen prompts like the VR-3, but the sequence is laid-out very logical (i.e. similar to "normal" dive computers with one for "select" and the other for "next" etc.).

There is no nice color screen like the VR-3 color (which is one of the best screens on any dive computer I have ever used), but information is easy to read.

Did I mention that the GF deco actually work and match the tables to the exact minute when tested on a square dive profile ?

Now, if I could get one dive computer that has:

• same color screen as VR-3
• same strap as the VR-3
• same battery acceptance as VR-3 (1.5 to 3 volt)
• same GF algorithm as Shearwater
• same size as Cochran EMC-20H (?) or smaller
• same buttons as the Vision handset

then it would be the perfect computer IMHO

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"...after a while you get bored offering advice to a bull that like to keep butting the fence with its head rather than walking through the open gate..."

- Rebreather World PM

01RMB

I'll have one of those!!!

I have been holding off on getting a backup computer for my Vision because I just can't find one I like. So far everything is either too big, too complicated, screen too cluttered, not tough enough, built like a brick, doesn't line up with my chosen deco algorithm, doesn't handle open circuit bail out...

Until the Phi's ideal computer gets built I will just have to stick to my timer and tables.

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Cheers
Rod