I have now done it. I did it different as announced, because this was faster and is better comparable to Rossis situation. I used a warm airblow on an aluminium board and "Tesafilm" for the isolation layer. This simulates the heat distribution in Rossis experiment. It was a full success and I got good photos that prove every detail.
One of my instruments has fresh calibration by Testo, and I have photos that show both display the same temperature under the same conditions. With Tesafilm the difference is 4-5° in a 35° warm airblow. But dont ask, I have not much time to answer. This was about 40 minute of work to do and I will upload the images in evening. The photos explain everything. It is better documented than Rossis demonstration. Its now 8:30 here and I am at work. I hope I can upload the photos in evening after 20:00 best regards, Peter ----- Original Nachricht ---- Von: Jed Rothwell <[email protected]> An: [email protected] Datum: 09.12.2011 03:54 Betreff: Re: [Vo]:Yo: Peter Heckert! Is a 0.1 mm gap a problem or not? > Peter Heckert <[email protected]> wrote: > > One thermocouple will be in close metallic contact to the resistor and the > > other will be isolated by a piece of duct tape. > > > > Ah, ha. Maybe you mean the other will be attached to the metal with a piece > of duct tape. That would be interesting. A sub-standard way to attach it. > In a proper calorimeter that would be a terrible way to do things. > No the duct tape (Tesafilm) is on the metal and simulates an air gap. You will see it in the photos. > I thought you meant there would be duct tape between the TC and the metal > surface. Not so interesting. > > I was surprised today to find that ordinary adhesive tape works well enough > to keep the two TCs remarkably in sync with one another. It was uncanny. I > decided to start by eliminating the bias with the screw adjustment, rather > than just pressing REL. > > - Jed >
