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Help! My machine quit working.
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surferdude2 Online

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Posts: 1,077
Joined: Jul 2014

Machine: ResMed S9 AutoSet
Mask Type: Full face mask
Mask Make & Model: Mirage Quattro & Optilife
Humidifier: ResMed H5i @ #3 if nose breathing & #5 if mouth breathing
CPAP Pressure: 12 ~ 20 & 11 ~12 if nasal mask
CPAP Software: ResScan SleepyHead

Other Comments: Late stage 2 emphysema

Sex: Male
Location: Mousetown, Southern Illinois

Post: #11
RE: Help! My machine quit working.
BTW, for the air tube in the water vessel to be accurate, you should use a tube connected to the O2 port on the mask. If you use the main air flow tube with nothing connected, you will not get an accurate reading since the fan is not handling the proper amount of air that it is rated at and will tend to give lower pressure reading under those conditions.
08-03-2014 01:24 PM
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Doc J Offline

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Posts: 199
Joined: Dec 2013

Machine: ResMed S9 AutoSet
Mask Type: Nasal pillows
Mask Make & Model: ResMed AirFit P10
Humidifier: resMed H5i Dumped and dry daily
CPAP Pressure: 10-15
CPAP Software: ResScan SleepyHead

Other Comments: Knowledge is King and this is the place to find it! Thanks everyone.

Sex: Male
Location: Central Nebraska

Post: #12
RE: Help! My machine quit working.
If you have not reset your machine yet I would. Unplug power from the back of machine for a minute an plug back in. Any electronic equipment can get a glitch and that may reset. Beyond that ck what everyone else is suggesting and or call the company and they should be able to help confirm the problem and have a solution. That's why I have a back up machine but I don't use Vpap which is een more expensive.

Good Luck!

Doc J (despite my nickname I am not a doctor)

Remember to donate to the board if you can, it has helped a lot of people including myself.
08-03-2014 04:06 PM
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retired_guy Offline

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Posts: 2,744
Joined: Jan 2014

Machine: ResMed S9 Autoset
Mask Type: Nasal pillows
Mask Make & Model: Resmed Airfit P10
Humidifier: ResMed
CPAP Pressure: 10.6/14, EPR 3
CPAP Software: ResScan SleepyHead

Other Comments: Is it bedtime yet?

Sex: Male
Location: Beautiful, albeit very wet Oregon Coast

Post: #13
RE: Help! My machine quit working.
(08-02-2014 11:14 PM)Kate Wrote:  I have been using CPAP fora year and a half, so I do know how the ramp pressure feels. But your test is fabulous! I will try that this evening, for sure and let you know what happens. Thank you so much.

Kate

Also, please disconnect tube from mouth before placing under water.
08-03-2014 06:13 PM
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Kate Offline

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Posts: 85
Joined: Dec 2013

Machine: ResMed S9 VPAP S
Mask Type: Full face mask
Mask Make & Model: Philips Resperonics FitLife
Humidifier: ResMed S5i
CPAP Pressure: 8/4
CPAP Software: ResScan

Other Comments: VPAP always makes me feel like my avatar.

Sex: Female
Location: Poulsbo, Washington

Post: #14
RE: Help! My machine quit working.
I did Sleepsters test and with ramp time off, the pressure was 4. I then turned the pressure way up to 14 or 15 and the pressure was still 4.

Now I will give Payton's test a try. I have my fingers crossed but I'm not hopeful because I had not changed any of the settings before my pressure went bad.

But thank you to all for such really wonderful ideas.
Tried Doc's test....nope.

:Using cpap then vpap since Feb.2013,
Kate
(This post was last modified: 08-03-2014 08:23 PM by Kate.)
08-03-2014 08:21 PM
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Kate Offline

Preferred Members

Posts: 85
Joined: Dec 2013

Machine: ResMed S9 VPAP S
Mask Type: Full face mask
Mask Make & Model: Philips Resperonics FitLife
Humidifier: ResMed S5i
CPAP Pressure: 8/4
CPAP Software: ResScan

Other Comments: VPAP always makes me feel like my avatar.

Sex: Female
Location: Poulsbo, Washington

Post: #15
RE: Help! My machine quit working.
My back-up machine is at home. I'm on vacation. But I may get a travel machine and l lug both around when I travel. Bah, humbug!

Kate

:Using cpap then vpap since Feb.2013,
Kate
08-03-2014 08:27 PM
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retired_guy Offline

Preferred Members-2

Posts: 2,744
Joined: Jan 2014

Machine: ResMed S9 Autoset
Mask Type: Nasal pillows
Mask Make & Model: Resmed Airfit P10
Humidifier: ResMed
CPAP Pressure: 10.6/14, EPR 3
CPAP Software: ResScan SleepyHead

Other Comments: Is it bedtime yet?

Sex: Male
Location: Beautiful, albeit very wet Oregon Coast

Post: #16
RE: Help! My machine quit working.
You aren't vacationing in Telluride Colorado by any chance are you?
08-03-2014 08:46 PM
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PaytonA Offline
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Posts: 3,012
Joined: Dec 2013

Machine: ResMed S9 VPAP Auto
Mask Type: Full face mask
Mask Make & Model: Resmed Mirage Quattro
Humidifier: H5i(distilled-top up)
CPAP Pressure: VAuto MinE14.0 MaxI 20.6 PS4.0
CPAP Software: ResScan SleepyHead

Other Comments:

Sex: Male
Location: Orange County,California

Post: #17
RE: Help! My machine quit working.
(08-03-2014 01:24 PM)surferdude2 Wrote:  BTW, for the air tube in the water vessel to be accurate, you should use a tube connected to the O2 port on the mask. If you use the main air flow tube with nothing connected, you will not get an accurate reading since the fan is not handling the proper amount of air that it is rated at and will tend to give lower pressure reading under those conditions.

I do not understand why you can not get a good reading from the main air flow tube. Without the mask on the tube, starting the machine will give you way more than normal air flow but as you move the end of the tube down into the water you will get some back pressure that will make it more like normal use. I guess it really should not matter since we are concerned about pressure not flow.

Best Regards,

PaytonA
08-03-2014 09:32 PM
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surferdude2 Online

Advisory Members

Posts: 1,077
Joined: Jul 2014

Machine: ResMed S9 AutoSet
Mask Type: Full face mask
Mask Make & Model: Mirage Quattro & Optilife
Humidifier: ResMed H5i @ #3 if nose breathing & #5 if mouth breathing
CPAP Pressure: 12 ~ 20 & 11 ~12 if nasal mask
CPAP Software: ResScan SleepyHead

Other Comments: Late stage 2 emphysema

Sex: Male
Location: Mousetown, Southern Illinois

Post: #18
RE: Help! My machine quit working.
(08-03-2014 09:32 PM)PaytonA Wrote:  I do not understand why you can not get a good reading from the main air flow tube. Without the mask on the tube, starting the machine will give you way more than normal air flow but as you move the end of the tube down into the water you will get some back pressure that will make it more like normal use. I guess it really should not matter since we are concerned about pressure not flow.

Best Regards,

PaytonA

That's what I thought Paytona but my empirical results didn't come out that way. Fans do strange things when they are starving for input and pushing against a blocked output. Their static pressure at the output must be measured at some given delivery rate as dictated by what is known in the trade as "Fan Laws". You can get a lot of very dry reading on that by Googling "fan laws". I will add that it is the type of reading that may well render your CPAP device unnecessary. SHa_biggrin5

The test with the air supply line only yielded a reading of .8 X machine setting whereas the test with the mask on and a using a small tube attached to one of the O2 ports on it yielded the same reading that the machine was set at.

Since the machine's pressure sensor is inside the machine and the pressure we want to subject our face to is downstream considerably, it would seem to follow that the number registered on the machine's LED is arrived at arbitrarily and was arrived at by taking into consideration several pressure drop factors which are affected by flow rate, such as the line length and the mask type. That's borne out by the fact that you must use a different setting on the machine when you change mask types. Go figure.

All the best, surferdude2
08-03-2014 10:03 PM
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PaytonA Offline
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Posts: 3,012
Joined: Dec 2013

Machine: ResMed S9 VPAP Auto
Mask Type: Full face mask
Mask Make & Model: Resmed Mirage Quattro
Humidifier: H5i(distilled-top up)
CPAP Pressure: VAuto MinE14.0 MaxI 20.6 PS4.0
CPAP Software: ResScan SleepyHead

Other Comments:

Sex: Male
Location: Orange County,California

Post: #19
RE: Help! My machine quit working.
I agree with you that the pressure displayed by the Resmed machine is a close approximation of the pressure inside the mask.It is arrived at by considering the pressure drops due to the machine, hose, and mask ergo the settings for mask type and hose length. With no mask on the end of the hose there is one less pressure drop than normal but when trying to get an order of magnitude answer on whether or not the machine is working I do not think it is a big deal. For absolute accuracy you are right.

Best Regards,

PaytonA
08-04-2014 11:11 AM
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surferdude2 Online

Advisory Members

Posts: 1,077
Joined: Jul 2014

Machine: ResMed S9 AutoSet
Mask Type: Full face mask
Mask Make & Model: Mirage Quattro & Optilife
Humidifier: ResMed H5i @ #3 if nose breathing & #5 if mouth breathing
CPAP Pressure: 12 ~ 20 & 11 ~12 if nasal mask
CPAP Software: ResScan SleepyHead

Other Comments: Late stage 2 emphysema

Sex: Male
Location: Mousetown, Southern Illinois

Post: #20
RE: Help! My machine quit working.
(08-04-2014 11:11 AM)PaytonA Wrote:  when trying to get an order of magnitude answer on whether or not the machine is working I do not think it is a big deal.
Best Regards,

PaytonA

I agree and I will add that I didn't intend to over analyze the simple test you presented but it all started when I used the full size supply tube as you suggested. In the process of getting the reading, I managed to blow a large quantity of water from the container and made quite a mess in my laboratory (spelled bedroom). Oh-jeez

It occurred to me that a smaller tube would make smaller bubbles and not be so violent as to belch all that much water in the process. Not having any suitable hose reducing fittings handy I decided to use the mask since it had some small ports on it for O2 insertion (and a side benefit of protecting me from any further water bath of my face Too-funny ) . Since the resulting pressure readings were much different than those obtained when doing the first test. After I dried off, I decided I should report them in case someone wanted a more accurate test to see if their machine was actually delivering as promised.

I hope I didn't confuse the OP since your test was sufficient for her purpose.

All the best, surferdude2
08-05-2014 09:36 AM
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