Question

A load cell is calibrated in an environment at a temperature 21°C and has the following deflectionload characteristic ii. Load (kg)0 50 100 150 200 Deflection 0.0 1.0 2.0 3.0 4.0 When the same instrument is used in an environment at 35°Cs characteristic changes to the following: Load (kg) 0 50 100 150 200 Deflection 0.2 1.3 2.4 3.5 4.6 a) Determine the sensitivity at 21°C and 35°C. b) Calculate the total zero drift and sensitivity drift at 35°O c) Hence determine the zero drift and sensitivity drift coefficients in units of 5 marks 4 marks] (um/C) and (um/kgAC) respectively 5 marks

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