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+--- Thread: How to know if heated tube is working (/Thread-How-to-know-if-heated-tube-is-working)
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How to know if heated tube is working - oldfart59 - 03-08-2018
Had to get a new heated tube since the original one was almost cut in half ( no sure how that happened). Now I noticed that water is condensing inside the tube. I read it is because the tube is too cold. both settings are on auto. Should the tube not be warm to the touch after a few hours of use, like in the morning? mine is not warm.
I wonder if this tube is a dud.
RE: How to know if heated tube is working - ShaunBlake - 03-08-2018
Sadly I don't have experience with heated hoses (yet), though I have seen lots of threads about them. My dementia prevents me from making any suggestion other than to do a search for heated hose in the title. There is a lot of information about them, including some tips for checking them. (The Search tool is at the top of the page in the black banner.)
RE: How to know if heated tube is working - S.L. Ping Beauty - 03-08-2018
I asked a similar question in this thread.
Perhaps it might help you.
RE: How to know if heated tube is working - SarcasticDave94 - 03-08-2018
You can try changing to Manual humidity mode and set it between 1-8. Manual humidity mode will force you to choose a tube temperature, where Auto humidity gives the option to run the tube with the settings of OFF, 60-86 degrees, or Auto. I run the heated hose at 86 degrees, and I think I feel it warming up upon powering up the device for therapy.
RE: How to know if heated tube is working - JesseLee - 03-08-2018
I would follow Sarcastic Dave's advice. I add that you double check the connection of the hose to the machine. Take a peek at the connector and make sure it isn't obviously damaged and reconnect the hose making sure it is fully seated.
RE: How to know if heated tube is working - SarcasticDave94 - 03-08-2018
(03-08-2018, 10:28 PM)JesseLee Wrote: I would follow Sarcastic Dave's advice. I add that you double check the connection of the hose to the machine. Take a peek at the connector and make sure it isn't obviously damaged and reconnect the hose making sure it is fully seated.
Good point on the connector, JesseLee. The device end of the heated hose must mate with the terminals for it to power up the heated coil in the hose.
RE: How to know if heated tube is working - oldfart59 - 03-08-2018
(03-08-2018, 10:03 PM)S.L. Ping Beauty Wrote: I asked a similar question in this thread.
Perhaps it might help you.
Why didn't I think of that! So I measured ~10 ohms from center to left, on 200 scale, but on right, I got 12.87k on 20k scale, infinity with my diode setting.
Also, I set the tube temp to max, and still the tube was not warm. I think I will buy a tube sock
I think I will return it say its a dud and then measure the next one, see if that is any different.
RE: How to know if heated tube is working - JesseLee - 03-08-2018
Let us know what the results are. I'm interested. I speculate that the higher (12.87kohm) reading might be a thermistor. I wonder if you put your hose in the freezer you might get a different value.
RE: How to know if heated tube is working - Sleeprider - 03-09-2018
Without a cover, the resistance wires in a CPAP tube do not produce enough heat to be detected by touch. They are very low power devices, and are not intended to warm the air, but only to keep the tube wall warm enough to prevent condensation. Manual mode works better IMO, and I also use a fleece cover. My first heated hose was a product made in Australia, before Respironics and Resmed developed heated tubes, and it produced significant heat that could be felt.
RE: How to know if heated tube is working - car54 - 03-09-2018
You can also use an infrared thermometer. Just point it at the hose and see if it is warmer than the temperature of the furniture that is close to it. You can get them as cheap as $20.00
car54