Checking YBOD handsets

[Padowan]

OK, the current unit has 2 handsets, we all know that, and one is the master and one is the slave. How often do people here check their slave handset?

I check mine during pre-dive checks to make sure it's tracking, and close to the master, but after that it's clipped across my waist, and I don't look at it any more during a normal dive, I only look at the Master one, which I clip to one of the inside-CL-edge rings.

Obviously if you clip them together then it's easy to look at them both, but in reality what's the advantage, UNLESS you're troubleshooting, or trying to validate a duff controller, in which case I can unclip it and look at it.

Do people here feel the need to monitor both handsets ALL the time?

Any thoughts?

[beanie]

I dive my slave handset and check my master everynow and then

then I know my slave is working and if the master dies its OK and the slave would say master rather than slave ...

hey it sounded like a good idea when it was sugested to me

[Decodiver]

Hi Padowan,

I clip both together and check both each time I look at them, this is why:

A couple of years back I was at the surface helping someone back onto a ladder in heavy seas and still on the loop, checked my master and it was dead, being I was at the surface and working hard I immediately manually injected O2, then checked my slave, it too was dead.

Both handsets had been inadvertently switched off in all the sodding about and as the slave had obviously gone off first there was no alarm when the master was turned off. 2 lessons.

You have 2 handsets, so you have 2 ways of monitoring your loop, I humbly suggest you use them both and second lesson don't wait to check your second handset if the first has failed, inject Dil at depth and always O2 on the surface. These should be motor reactions and practiced and thought through often.

I also keep both handsets clipped together in front of my face hooked over my thumb on ascent for obvious PPO2 reasons.

Just my ten pence worth.

Cheers

Dave Cooper

[nigelH]

Originally Posted by Padowan

Do people here feel the need to monitor both handsets ALL the time?

Yes. Although the slave only just gets a check to see it's still going and reading sense. I've clunked switches and turned them off before now clambering inside things.

nigelH

[Padowan]

OK. But the new units (Evolution) only have one handset? I know there are still 2 independant controllers, but AFIK only one set of values is presented to the diver....

Do those who use decide to monitor both handsets, consider this change a reduction in the safety of the overall system then, or does the new electronics do something else cunning instead?

Is the HUD considered a primary display?

[beanie]

Originally Posted by Padowan

OK. But the new units (Evolution) only have one handset? I know there are still 2 independant controllers, but AFIK only one set of values is presented to the diver....

Do those who use decide to monitor both handsets, consider this change a reduction in the safety of the overall system then, or does the new electronics do something else cunning instead?

Is the HUD considered a primary display?

you can switch between displays AFAIR

HUD is visual representation of the handsets (both - two LEDs one for each controller)

its 5 months scince martin showed it me at pure inspiration

hopefully on factory tour week after next so will have another butchers

[Decodiver]

As Beanie correctly said the HUD shows lights for both controllers.

This is in addition to the setpoints displayed by the handset, The controller you choose as Master is displayed at the top of the screen, the other controller ie the Slave runs in the background, if the battery or the Master fails the Slave instantly takes over.

In addition by pressing briefly the left button on the controller, the Slave readings appear at the bottom of the display in order for you to visually verify them against the Master. They then disappear.

This is a significant safety feature combining a HUD and a controller.

Can't wait for mine to arrive and I am also getting a Megalodon in January so will post my comparisons eventually.

Cheers

Dave Cooper

[Mark Chase]

Originally Posted by Padowan

OK. But the new units (Evolution) only have one handset? I know there are still 2 independant controllers, but AFIK only one set of values is presented to the diver....

Do those who use decide to monitor both handsets, consider this change a reduction in the safety of the overall system then, or does the new electronics do something else cunning instead?

Is the HUD considered a primary display?

The new insperation HUD is NOT a primary display as it is not fail safe its is also not marketed as a primary display. The HUD from URI IS a primary display because it is fail safe and has its own independendt power supply. Uris HUD is as I understand it, independently linked to each cell giving three independend assesments of the unit.

ATB

Mark Chase

[Decodiver]

Originally Posted by Mark Chase

The new insperation HUD is NOT a primary display as it is not fail safe its is also not marketed as a primary display. The HUD from URI IS a primary display because it is fail safe and has its own independendt power supply. Uris HUD is as I understand it, independently linked to each cell giving three independend assesments of the unit.

ATB

Mark Chase

I think people need to think long and hard before they consider using a HUD as a primary, regardless of whether or not it is fail safe and has it's own power supply.

HUDs IMHO are additional tools that can give you a comfort zone indication, they are not controllers and we should all be regularly checking handsets regardless of hearing the solenoid firing or otherwise. That's what I teach my students and that's what I do myself.

Cheers

Dave Cooper

[Andy Phillips]

Originally Posted by Decodiver

I think people need to think long and hard before they consider using a HUD as a primary, regardless of whether or not it is fail safe and has it's own power supply.

HUDs IMHO are additional tools that can give you a comfort zone indication, they are not controllers and we should all be regularly checking handsets regardless of hearing the solenoid firing or otherwise. That's what I teach my students and that's what I do myself.

Cheers

Dave Cooper

I can't agree with this, the unit designed by Uri is a primary display, it monitors all three sensors and reports back via an LED display their compliance with the set point. The only deviation from the handset is that it only reports information within a tolerence not absolute values. The unit designed by AP is designed to be a warning device, it only reports that there is a problem and requires the user to look at the handset to establish exactly what that problem is. The advantage offered by the AP solution is that it carries warnings for other things such as low battery etc.

Andrew