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MAE334 - Introduction to Instrumentation and Computers Quiz 4 November 15, 2006 o Closed Book and Notes o No Calculators 1. Fill in your name on side 2 of the scoring sheet (Last name first!) 2. Fill in your 8-digit person number on your scoring sheet. o For each question, choose THE BEST ANSWER and mark the corresponding answer on the scoring sheet.Design Stage Uncertainty Problem An ADC is to be used to measure the output from a thermocouple. The nominal temperature expected will be about 20 °C. Estimate the design-stage uncertainty in this combination. The following information is available: ADC Gain: 1 Range: ±1 volt Resolution: 10 bits Accuracy: within 0.001% of reading Thermocouple Sensitivity: 10-4 V/°C Linearity: within 1 mVolt/°C over range Repeatability: within 2 mV/°C over range Resolution: negligible 1) The voltage measurement design stage uncertainty of the ADC is a) ()1012022u=± b) ()()()()108122221022dEEEu= +−±× c) ()()()108122221022dEEEu= +−±× d) None of the above 2) The design stage uncertainty of the thermocouple can be assumed to be a) 22(1 mV/ C) 20 C + 2 mV/ C 20 C⎡⎤⎡±× ×⎣⎦⎣DD DD⎤⎦ b) 221(1 mV/ C) 20 C + 2 mV/ C 20 C2⎡⎤⎡±× ×⎣⎦⎣DD DD⎤⎦] c) [][221 mV + 2 mV± d) None of the above3) A linear potentiometer as used in the fourth lab in combination with the ADC used to acquire the output voltage has a position measurement zero order uncertainty of __________ where K is the static sensitivity of the position vs. voltage calibration and Q is the resolution of the ADC. a) ± ½ (K Q) b) ± (K Q) c) ± ½ Q d) ± Q e) None of the above 4) The delta function integral is defined to be equal to: ()tdtδ+∞−∞∫a) 1 b) ½ c) 0 d) -1 e) None of the


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UB MAE 334 - Quiz 4

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