need infos about use Resmed S9 an a car, 12V DC

[billbolton]

If anyone else has a contact with a Resmed rep. maybe they could call and get part #....

I've left a message with Resmed Tech Support here is Sydney, so hopefully I might get a response before COB today (its just after 3pm Sydney time).

Shouldn't be any different than the 24 volt VPAP one, just a different connector.....

Since it has to run the Humidifier as well as the Flow Generator, that's reasonably unlikely. Also if it were that straightforward, it would have been release to market concurrently with the S9.

Cheers,

Bill

[Goofproof]

Resmed isn't a power friendly XPAP

No more or less than other vendors.

in general the standard for power is 12 Volt D.C., Center Pin Pos.

No, in general its about 50/50 about whether the pin is positive or negative.

Cheers,

Bill (IEEE)

Please give list of CPAPS, Not BPAPs, that are center pin Neg, and 24 volts. Jim I'm sure it's a short market share other than Resmed. Jim

[Astrophytum]

Hi there
Why don't you rent a small motorhome instead of a car. That way you have all the hook-ups you need with a sine wave inverter connected to the coach battery. You would also have a bed, kitchen and bathroom....bonus. We have small motorhomes here than are no bigger than a van just like your camperized VW van.
Happy holidays.
Nan

Oh no, I will never use a motorhome! I need an SUV. I'm not a normal tourist who show the NP's and so on. I make an fieldtrip into the desserts to search a special kind of plants. I also need no kitchen, on my travelling I always decrease 6 kg…


Regards,
Astrophytum

[Astrophytum]

Hi,

I have disconnect the powerplug from S9 and have make a measurement of the voltage coming out of the powersupply.

Please look at the picture:



Mayby this would be more difficult as a thinked at the start to build a powersolution for use 12V DC from an car...

Well, I will wait until December Resmed will have a own solution. And then I will see what is sinside of this powersupply...no fear, I am by profession an electronics engineer and have learnt another two other occupations/professions.


Regards,
Astrophytum

[Goofproof]

As a professional electronics engineer, did you make the voltage measurments, with the unit hooked up to the S9, without that the voltage numbers are meaningless, also you need current draw for each pin. The easy way would be to buy a Respironics XPAP, the second easy way would be to run it from A/C, whatever flavor the S-9 wants. Jim

[Astrophytum]

As a professional electronics engineer, did you make the voltage measurments, with the unit hooked up to the S9, without that the voltage numbers are meaningless, also you need current draw for each pin. The easy way would be to buy a Respironics XPAP, the second easy way would be to run it from A/C, whatever flavor the S-9 wants. Jim

False... How do you know how I measured? The current draw is quite interesting…
…

As an compter expert you must know that use a converter to get 110V~, or 230V~, and then use the powersupply from S9, costs many engergie that transformed into heat. (Sinus converter are very expemnsive) This method wasted far too much power.


Regards,
Astrophytum

[billbolton]

Just received an e-mail from a customer servive representative at Resmed, she said they just released the S-9 converter.

Resmed Tech Support returned my call this morning.... the information you were given was unfortunately wrong.

The 12V DC adapter for the S9 is still in development and is now unlikely to be available before January 2011. There is no part number for it as yet.

Cheers,

Bill

[Goofproof]

As a professional electronics engineer, did , without that the voltage numbers are meaningless, also you need current draw for each pin. The easy way would be to buy a Respironics XPAP, the second easy way would be to run it from A/C, whatever flavor the S-9 wants. Jim

False... How do you know how I measured? The current draw is quite interesting…
…

As an compter expert you must know that use a converter to get 110V~, or 230V~, and then use the powersupply from S9, costs many engergie that transformed into heat. (Sinus converter are very expemnsive) This method wasted far too much power.


Regards,
Astrophytum

I have no idea how you measured the voltage, that's why I posted "DID, you make the voltage measurments, with the unit hooked up to the S9.

Yes it does take more energy to push 12 Volt D.C. to 110 Volt A. C. then run the S-9 on 110 Volts, and Sine Wave converters are costly. That's why buying a more power friendly XPAP is important, if you want to play away from real A.C. power sources. With Respironics, and others, all you need is a cheap 12 volt cable, game set match, as long as you don't require a HH. Some vehicles have aux power outlets that protect from battery run down, My 2009 Sierra Truck does, but I don't think I would trust it blind to work as I wanted. I do have a jump starter unit, I'd charge it and have it handy. Jim

[billbolton]

(Sinus converter are very expemnsive)

You only need a modified-sinewave type inverter to run an S9+H5i.

This method wasted far too much power.

Most inverters available today, even the cheapest ones, are well over 90% efficient (many are over 95% efficent) as long as the load is reasonably matched to the capacity of the inverter.

Cheers,

Bill