A digital kitchen scale contains a load cell whose output signal changes by for every…

PHYSICS · Multi-part · Fermi University Physics · Scientific Practice & Experimental Methods · Quantities, units and the practice of measurement · Quantities, units and the practice of measurement

Measurement and Method, Ch The instrument: resolution, sensitivity, calibration and traceability

Problem

A digital kitchen scale contains a load cell whose output signal changes by

0.005\,\mathrm{mV}

for every additional gram placed on the pan. The display rounds the mass to the nearest gram, over a range of

0

3000\,\mathrm{g}

. ((a)) State the resolution of the display. ((b)) State the sensitivity of the load cell. ((c)) Calculate the smallest change in the load cell's output voltage that corresponds to the smallest change the display can show.

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