A digital multimeter on its current range resolves and is specified to

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

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

Problem

A digital multimeter on its 200.00 mA200.00\,\mathrm{mA} current range resolves 0.01 mA0.01\,\mathrm{mA} and is specified to ±(1.0% of reading+3 digits)\pm(1.0\%\ \mathrm{of\ reading} + 3\ \mathrm{digits}), where one digit is 0.01 mA0.01\,\mathrm{mA} on this range. Evaluate the bound on the reading's error, in milliamps and as a percentage of the reading, for displayed readings of: ((a)) 180.00 mA180.00\,\mathrm{mA} ((b)) 20.00 mA20.00\,\mathrm{mA} ((c)) 2.00 mA2.00\,\mathrm{mA}

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