smiles

Don't sure this is the right forum for my thread because I am referring about a medical device that is blood analyser. The problem of this device is it can't suck the blood sample in the pre-dilute mode. The blood will be attracted into a so-called White blood cell basin. At that time, a plastic pot is at "negative pressure" and it connects to White blood cell basin via a valve. In the others way, the tube that sample will be attracted into also connect to that basin. So when I test "ON" that valve while no using sample (means the tube is connected to air pressure. The basin get two pressure, "-" from the pot and "+" from air. And so in that test mode, another motor that control the flow of air then control the pressure of that pot will operate, its operation is something like "stop" then "run" then "stop" ... I was said that the reason is there are two kind of pressure in the basin. Now if I stop the tube 's head then from theory, there is only "-" pressure, then anything in that tube will be sucked in the basin and the motor will operate at one state only but it still the same like before. I check and see no errors on the tube (also the tube connect the pot to the basin is still good) . Now I discover that one screw make the basin crack like the crack on your glass for drinking, but I think that is very very small gap, so does it affect the pressure inside the basin ? Thanks. One more question, when you blow from A to B, then the pressure of A is greater than B caused of your action ?

My TV's antenna is rust, does it affect the detection of signal ? Short question, help me with it? thanks so much

I am in doubt that a mad one know nothing, if that true, so how their brain process words that someone say to them ??? That 's all

Someone ask me this case for fun: "a blind accidentally crashes a mad, a blind asks a mad the way to a bookshop is turn left or turn right, what is the answer of the mad ?" Just wonder how the mad get any information and tell me the answer if you know Thanks !!!

a wonder, how water brings charges

If you know, please tell me how to set up convention for these vertical bar 's operation ? Thanks !!!

Could you tell me the principle of these vibrations, what they depend on Thanks so much !!!

Hi! could you tell me the meaning of line-up in photography ? Thanks !!!

Hi, I read this sentence but don't understand the meaning of the word "lineup", do you know what is it ? "Olympus stereo zoom microscopes: higher performance in a wider lineup"

could you tell me why they use halogen instead of vacuum to make small lamp with high power, and why we can touch the surface of the halogen lamp ? Thanks !!!

thanks so much

thanks !!! I read your links and understand some uhm ... could you tell me why sometimes I see bubbles appear in the surface of a object that surrounded by liquid ?

but ... how it do cleaning, how can it clean dirty substances by sound waves (let them in motion but what next ?) ? thanks !!!

Anyone hear about it, please tell me if you know how it works ? http://www.ied.edu.hk/has/phys/phydemo/sd_wa/utrav.htm What happen to the bottle in this link above ? Thanks so much !

uhm ... do you mean we cut by electric discharge phenomenon