I love to Hate O2 cells

rewrites

Hi Tino

Pretty obvious now you have outlined it Not that clear in the manual, though.

Good advice. Thanks.

__________________
Always running with scissors ~8~

wizbang

Hi Tino, there are times when you need the multimetre.
If the handsets are not giving a reading and you test the cell with the multimetre and it reads "ok" and you put the cell back and it still reads nothing on the handsets then there will be a problem from plug to computer somewhere.

Without the multimetre, in your example, if the handsets gave no value then you would assume it was the cell and toss it, which may not always be the case.

Just because the unit can give mV as well as a calculated reading doesn't mean you don't need an independent checker.

Just my thoughts.

Tino de Rijk

Yep, I agree, if you get funny readings, you might want to double-check after removal with a multimeter to make sure it is not a problem in the connection somewhere. But that applies to any rebreather in this world, untill perfect hardware shows up, and pigs can fly...
I just reacted on "it is not possible to read mV with the handsets".
In a normal situation with an Inspo you can.

Ciao,

Tino.

pabusk

Not completely true, I thought it was common practise to swap cells between a working and non-working slot to asses cell or wiring/controller problems. If the problem follows the cell it's the cell, if the problem sty with the cell slot it's wiring or the controller.

You see ... still no multimeter needed

Cheers,

wizbang

A very common practice on a KISS or homebuilds with simple PPO2 metres.
They are task specific multimetres but on the inspo there is other baggage that goes along with the reading/system.

What if it is the brain box ? If everything is working but no cells are reading do you just assume it is the cells or would you pop them out and give them a quick test with the multimetre.

Or if you have an intermittent fault? It would be easier, for me, to pull the cell/s and test them on the bench rather than shuffling them around the head.

I do take the original point though that a ready to hand multimetre (although not indpendent of the problem) is available during the calibration sequence.

hmmm will the unit let you do a calibration sequence if one of the cells has dropped out? I think the cell error warning may lock you into a cycle.
I will need to give it a whirl. I happen to have several faulty DRE express cells. I will report back when I get a chance.

pabusk

I thought we where talking about 1 cell ... this IS easily isolatale by switching cells doesn't matter if you use a "brainbox" or not. In this case it's position or cellbound. It's indeed a different story if you have all cells not showing.

NO

Cheers
Paul