Posted by: devitg ® 07/07/2008, 14:31:54 Author Profile eMail author Edit

I have a closed test chamber. 700 mm W 530 mm H 630 mm deep I need it to be 100% HR at 41 °C +/- 0.3 °C No incoming or out coming air . The chamber is loaded once with material to test for up to 72 hours, open the door is avoided. It have a internal blower , air is routed to perforated pipes submerged in water where the shielded resistance heat the water, so the air bubbles in the water. A PID controller , work ok for the temperature show from 40.9 to 41.1 °C. My query . How I can measure the 100% HR. Small opening can be made to locate sensor. I also think to make a secondary small circuit by a small blower to route air from the chamber , trough the sensors and route inside the chamber. Any help will be granted. Thanks in advance.

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: 100 % HR meassure
: 100 % HR meassure -- devitg	Post Reply	Top of thread	Forum

Posted by: randykimball ® 07/07/2008, 16:46:53 Author Profile eMail author Edit

Welcome aboard, One way of several: Can you apply a very small amount of postive perssure in relation to ambient outside air? If so, and if you maintain a gauge reading on that pressure value. Then, if the positive pressure value maintains except for changes corresponding to ranges calculated per any temperature variations, you can be fairly positive no air has exchanged. With this method, you can expect that if the pressure goes up something is adding gasses to the chamber. In adverse, if the pressure drops you can know that gasses have leaked out. The worst suggestion of your lifetime may be the catalyst to the grandest idea of the century, never let suggestions go unsaid nor fail to listen to them. Modified by randykimball at Mon, Jul 07, 2008, 16:48:18

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