On Sun, Jul 25, 2010 at 10:39 AM, Vasile Surducan wrot= e: > Hi VG, one question please: how do you will control accurately both > temperature and humidity in the same time? I have algorithms that can manage that pretty well. Also, tolerance is wide enough. > There is an interdependence > between temperature and humidity in a closed chamber, two sensors that > are kept at different temperatures will show different RH values, but > the same dew point can be calculated. Before taking a measurement, you > always need to wait long enough for the conditions to stabilize. Not > only RH levels need to stabilize but also temperature. That's clear, > why it is not possible to make extremely accurate relative humidity > measurements. Thanks, but keeping the RH value within 10% is reasonable for my purposes. Temperature should be kept within 3 Kelvin of the desired temperature. > I've did some experiments quite long time: > http://adsabs.harvard.edu/abs/2009JPhCS.182a2018S > but my goal was to keep the same in two different chambers. I will definitely take a look at that. Thank you! --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .