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1. Consider the amplifier between stations B and C of the temperature measurement system shown in below. [a] Determine the minimum input impedance of the amplifier (in Ω) required to keep the amplifier's voltage measurement loading error, ev, less than 1 mV for the case when the bridge's output impedance equals 30 Ω and it's output voltage equals 0.2 V. [b] Based upon your answer in part [a], if an operational an1plifier were used, would it satisfy the requirement of ev < 1 mV (Hint: Compare the input impedance obtained in part [a] to that of a typical operational amplifier)? Answer yes or no and explain why or why not. [c] What would be the gain, G, required to have the amplifier's output equal to 9 V when T = 72 F?
2. An engineer is tasked with the job of specifying several components of a temperature measurement system. The output voltages from a Type J thermocouple referenced to 0 °C vary linearly from 2.585 to 3.649 mV over the temperature range from 50 to 70 °C. The thermocouple output is to be connected directly to an A/D converter having a range from -5 to +5 V. For both a 12 bit and a 16 bit A/D converter determine [a] the quantization error (in mV), [b] the percentage error at T =50 °C, and [c] the percentage error at T = 70 °C. Now if an amplifier is installed in between the thermocouple and the A/D converter, determine [d] the amplifier's gain to yield a quantization error of 5% or less.
3. Determine the simplified Boolean expression for X in the logic circuit below. Also, complete the timing diagram.
4. Design a passive lowpass filter for a sensor that has a cutoff frequency of 100 Hz. The filter should have a magnitude ratio of at least 0.95 at 50 Hz and not more than 0.01 at 200 Hz. The resistance of the sensor is 10 ohms. You will need to specify the number of even stages and the values for the components. Plot the magnitude ratio of the resulting filter out to 500 Hz
A piston cylinder device contains about 0.25kg of saturated water liquid @ 125C. Now water is heated at constant pressure until it becomes saturated vapor. How much is the work done during this process? How much is the heat transfer into the system?
the deep submersible vehicle alvin has a hollow titanium sg4.50 spherical passenger compartment with an inside diameter
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A centrifugal fan equipped with damper control has the damper wide open at full flow. The damper is partly closed to reduce flow to 80 percent of full load. Estimate the changes, in percent, in static pressure, and the horsepower requirement.
Ammonia vapor, 4500kg/h at 6.7 bara pressure, is to be cooled from 120oC to 40oC, using cooling water. The maximum supply temperature of the cooling water available is 30oC, and the outlet temperate is to be restricted to 40oC. The pressure drops ove..
Carbon fibre reinforced polymers (CFRP have been used extensively in aerospace applications due to their excellent strength to weight and stiffness to weight properties.
Refrigerant 134a flows at steady state through a horizontal tube having an inside diameter of .05 m. The refrigerant enters the tube with a quality of .1, temperature of 36 C, and velocity of 10 m/s. The refrigerant exits the tube at 9 bar as a satur..
calculate the span of a differential pressure transmitter that is mounted 10 inches below the bottom instrument tap on
a system of propane and n-butane exists in two phase vapor liquid equilibrium at 10 bar and 323 k. the mole fraction
an air conditioner using r-134a as the working fluid and operating on the ideal vapor-compression refrigeration cycle
Product and Engineering Design Review
today you have a savings account of 15 620. based on an annual interest rate of 4.2 what equal amount can you withdraw
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