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Do you still need help with your alarm and pressure code ?

James what is the expect role of this valve? The pressure drop across this valve would be variable dependent on the flow (and flow varies across both inspiration and expiration). Are you trying to

UF has now outfitted my living room with a real professional LUNG SIMULATOR (a mechanical bellows contrivance out of aluminum that can be set to have various stiffness, etc).? ? My living room cofee

A new design from the PANDA team. Flow Restrictor Valve www.thingiverse.com/thing:4289425 ( http://www.thingiverse.com/thing:4289425 ) James

The call with FDA went well.? ?(I'm just a fly on the wall for this part.)? ?We have a better idea how to proceed. And proceed we are doing!? ? You would be *amazed* at how fast some folks are

Hooray!!! Gordon [email protected]> wrote:

Now the Rainbirds have accumulated 1,588,410 cycles and the new prototype OP and PEEP valves have 310,400 cycles. The Rainbirds are opening and closing and the new OP/PEEP are still producing

Thanks you all, the numbers I am getting now makes sense;? blowing a bag gets reasonable values for what the high limit "feels"? like.

Folks, look carefully at what he wrote, look at the last line, he made a decimal point error. That’s the only thing he did wrong. The rest is correct. Look at how he moved the decimal point one

Marcelo - Gordon, of course, is right. If it isn't making sense to you perhaps very *gently *bubble some gas through a hose sitting deep in water in a bucket. As your raise and lower the tip of the

If the above is not a typo maybe that is the issue.?0.0101972 would be the same as the divide by 98 suggested by Gordon. Tom, wb6b

There’s no reason to make this difficult. The calls that I use to measure the temp at the same time and everything is corrected. I already wrote this code once for Marcelo. It’s already in there.

Measure the ambient pressure in Pascal‘s. Divide by 98 Answer should be somewhere around 1030 or 1040. Cmh20 That is absolute air pressure Store that number Do the same thing each time you measure

Back in the posts someone discovered the temperature had to be read from the sensor each time before each of the pressure readings or else the pressure readings would not be accurate. Maybe something

Nop... the sensor is providing the correct Pa values... matches with local Airport. cmH2O range in the spec DOES NOT MAKE SENSE according to what I read. With no help we are stuck here.

It might be possible that the sensor is reading hPa or kPa. The data sheet states the range of the sensor as in?300 ... 1100 hPa. Tom, wb6b

OK... here is the problem: I reset, get 101325 Pa and store it as my ref. First read I get 101325, so my gauge is (101325 -101325) * 0.0101972 = 0 Second read I get 104978, then (104978 - 101325) *?

A standard atmosphere is 101 325 Pa or 1033.23 cm water (in absolute pressure). The conversion is 1 Pa equals 0.0101972 cm water, or 1 cm water equals?98.0665 Pa. As Gordon indicated, once you know

The "zero" pressure may need to be taken at regular intervals, if you are not doing that now, not just on start up as has been discussed in previous posts. Or if an ambient BMP280 sensors has not been

No, it does not. Well, in part. Zero'ing reference is one thing. We need to know the scales. A variation of 1Pa does not mean 1 cmH2O. So far people are referring pressures in cmH2O. But all physics I