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Entry  Tue Nov 14 16:02:43 2017, Kira, Summary, PEM, seismometer can testing time_const.png
    Reply  Tue Nov 21 16:00:05 2017, Kira, Update, PEM, seismometer can testing cooling_fit.pngIMG_20171121_164835.jpg
       Reply  Wed Nov 22 12:13:15 2017, Kira, Update, PEM, seismometer can testing cooling_fit_1.png
          Reply  Wed Nov 22 14:47:03 2017, Kira, Update, PEM, seismometer can testing 
             Reply  Tue Nov 28 16:02:32 2017, rana, Update, PEM, seismometer can testing 
Message ID: 13447     Entry time: Wed Nov 22 14:47:03 2017     In reply to: 13446     Reply to this: 13455
Author: Kira 
Type: Update 
Category: PEM 
Subject: seismometer can testing 

For the insulation, I have decided to use this one (Buna-N/PVC Foam Insulation Sheets). We will need 3 of the 1 inch plain backing ones (9349K4) to wrap a few layers around it. I'll try two layers for now, since the insulation seems to be doing quite well according to initial testing.


Updated some values, most importantly, the k-factor. I had assumed that it was in the correct units already, but when converting it to 0.046 W/(m^2*K) from 0.26 BTU/(h*ft^2*F), I got the following plot. The time constant is still a bit larger than what we'd expect, but it's much better with these adjustments.

For our next steps, I will measure the time constant of the heater without any insulation and then decide how many layers of it we will need. I'll need to construct and calibrate a temperature sensor like the ones I've made before and use it to record the values more accurately.



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