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17. A type K thermocouple datalogger uses a thermistor to measure the cold junction temperature. It has a resistance of 22520 at 25.0 'C, with B= 3630, and with a tolerance of +/-0.2 C. You measure a resistance of 949 ohms. The voltmeter in the datalogger measures 46.495 milli-volts. Including the accuracy tolerances for the thermistor and thermocouple, what is the highest temperature that the datalogger would read in "C? (Type in a one-decimal number) 1197.1 V Correct19 0 = 2252 n at 250 c B = 3630 R. = 949 , Vm = 46. 49 mv $ the know B ( 7 - + ) - 157- 70 T= 250 c T= 25+243 = 298k using above equation 3630 949 = 2252 e 298 949 = ( 36:36 (+ - 298 ) 2252 0-421 - e taking log both sides. In (0-421) = en [@ 3030 (7-298) ) - 0-865= 35 3630 7 -243 - 2-38 X10 4 - 298 - R.38 X10 4= - - 3+ 355 X153- 7.38 *10 - 4 + 3+ 355 X10- 3. 117 X10 )= T= 320. 74 K T= 47. 74 0 C