The Accuracy of a Multimeter
The Accuracy of a Multimeter
Consider the resistance measurement shown on the multimeter.
Last term, we discussed only reading uncertainty, and we would have reported this measurement as
46.80 ± 0.05 Ω
(i.e. assuming that the meter is rounding, the measurement must be somewhere between 46.75 Ω and 46.85 Ω .)
In fact, most equipment comes from its manufacturer with a specification sheet detailing the manufacturer’s estimate of its accuracy. According to the specification sheet for the orange meter (shown at the bottom of the page), the accuracy of the orange meter, when measuring resistance, is
You would report your final measurement as
46.8 ± 0.7 Ω
