You are deciding between using a 5000 ohm thermistor, Material System 1, or a class A RTD for measuring the temperature of a critical circuit board of a smart phone near 30°C. The accuracy must be within 0.25°C throughout the range of measurement. Neither speed of response nor component cost is an issue. The 5000-ohm thermistor is defined in the table below. R25 Material System B Value 25/85°C Code R25°C 1% 500 500 10002 3540 : 1% 3627 +1% 3540 - 1% 3627 1% 3540 +/- 1% 3540 - 1% 1000 2A 1800 Maximum Operating Temperature °F (°C) 257 (125) 257 (125) 257 (125) 257 (125) 257 (125) 257 (125) 257 (125) 311 (155) 311 (155) 311 (155) 311 (155) 311 (155) 311 (155) 2000 2000 2200 3627 - 1% 3977 -0.75% 2700 3000 NK222C1'1 NK272C1'1 NK302011 NK502C1'1 NK502C4A 1 NK103C1'1 3977 -0.75% 3977 -/- 075% 3977 -0.75% 3436 - 1% 3977 - 075% 5000 5000 10000 Given the tolerance on B for the thermistor, what is the absolute value of the accuracy of the reading in C that you will get on the thermistor at 30°C? (Type in a three decimal number)
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