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Message ID: 1910     Entry time: Mon Sep 11 12:47:51 2017
Author: Kira 
Type: DailyProgress 
Category: TempCtrl 
Subject: epics channel calibration 

Craig helped me with the epics channel calibration. I made a conversion formula for voltage to Celcius by setting the room temperature to the measured voltage of -8.63V which is what the channel had as its output. I used a linear conversion of T=V*(-34)-273, similar to the one I had for my initial sensor. T is temp in C and V is voltage in V. Since the AD590 outputs a current proportional to the temperature, we can just have a direct relationship between the temperature (in K) and voltage since the resistance in the circuit remains constant, and subtract off 273 to get Celcius. The output of this when applying it to sensor 4 was about 20C, which means this is working properly.

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