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Entry  Thu Mar 21 16:56:42 2024, Tyler, Update, DAQ, RTD Parameter Calibration RTD_Calib-2.pngIMG_8569.jpg
    Reply  Mon Mar 25 10:55:33 2024, Tyler, Update, DAQ, RTD Parameter Calibration RTD_Calib_nobeta.png
       Reply  Tue Mar 26 13:51:56 2024, Tyler, Update, DAQ, RTD Parameter Calibration Screenshot_2024-03-26_at_1.23.27_PM.png
       Reply  Mon Jul 29 13:39:16 2024, Tyler, Update, DAQ, RTD Parameter Calibration RTD_Recal_params.pngRTD_recal_plots_fin.png
Message ID: 351     Entry time: Thu Mar 21 16:56:42 2024     Reply to this: 354
Author: Tyler 
Type: Update 
Category: DAQ 
Subject: RTD Parameter Calibration 
[Jon,Tyler]

We noticed that the RTD temperature readings given on the Cymac were off, and traced the issue to miscalibration in the relationship between the resistance and temperature of each RTD (Callendar-Van Dusen eqn). Below is the table of values inferred from independent measurements of temperature and resistance to rectify this problem. This data was then fitted to better determine the coefficients present in the temperature-resistance relation:

       R_0 (ohm)   Alpha    Beta

RTD 0   80.8674   0.001315   4.273e-6

RTD 1   79.5704   0.001887   3.7873e-6

RTD 2   81.7334   0.002014   2.1724e-6

RTD 3   74.3060   0.003677   3.6022e-8

RTD 4   81.1350   0.001761   2.3598e-6

RTD 5   77.9610   0.002423   -7.5192e-7

RTD 6   78.7980   0.001373   6.2909e-6

RTD 7   83.8616   0.001890   3.3529e-6

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