04 R4 12K R3 12 VS R5 15 R2 3.3K RT 3.32-30 In the bridge circuit above RT is a resistive displacement transducer. Its r

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04 R4 12k R3 12 Vs R5 15 R2 3 3k Rt 3 32 30 In The Bridge Circuit Above Rt Is A Resistive Displacement Transducer Its R 1 (46.48 KiB) Viewed 83 times

04 R4 12K R3 12 VS R5 15 R2 3.3K RT 3.32-30 In the bridge circuit above RT is a resistive displacement transducer. Its resistance varies linearly between 3.3k for zero displacement and 3.9k for a displacement of 10 mm. Hence we expect the resistance to be 3.6k at a displacement of 5mm. The read out device is a simple moving coil meter (with FSD = 10A) in series with a resistor Rs. such that the total resistance R5 = Rcoil + Rs where Rs is a high precision resistor chosen such R5 is the required resistance for the application. a) Calculate a total value of R5 that would result in a current of 10 PA flowing when RT = 3.9k. [5 marks) b) Using this value of R5 calculate the current that would flow when RT = 3.6k. [3 marks) c) Estimate the deviation from ideal linearity at the mid-position (b) and calculate the % non- linearity (discrepancy as % of full scale). [2 marks]