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Chee 291 Experimental Conditions

Chee 291 Experimental Conditions - E xperimental Conditions...

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Experimental Conditions Temperature: We learned how to make a thermocouple: We were given a T-type wire that had copper and constantan wires inside. We used pliers to separate the copper and constantan wires apart and peel the cover out of both ends of the wire. Then we tied the two wires together and sodered them together, to create a stronger connection. We measured and recorded the temperature of the ice bath, boiling water, liquid nitrogen and dry ice: To measure these various bath, we had to use an ohmmeter for the thermister and RTD which was already set up for us and a voltmeter, set on dc, in mV for the thermocouple. At the beginning of each recording we had to get a steady state of temperature of each device in ice water because its temperature of 0®C is a good median in comparison to the other baths (right in the middle of all the other temperatures) so when you plunge the measurement device into the bath (from the reference bath) the temperature change won’t be too drastic (i.e. if you went from a reference of hot water bath 100®C to liquid nitrogen, the temperature change would be too large).
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