Model 2110 5½ Digit Multimeter Reference Manual
Section 4: Theory of operation
2110-901-01 Rev. C/August 2013
4-5
Accuracy calculations
The following information discusses how to calculate accuracy for both DC and AC characteristics.
Calculating DC and AC characteristics accuracy
DC characteristics accuracy is calculated as follows:
Accuracy =
% of r % of range
As an example of how to calculate the actual reading limits, assume that you are measuring 5V on
the 10V range. You can compute the reading limit range from one-
year DCV accuracy specifications
as follows:
Accuracy =
0.012% of r 0.004% of range
0.012% * 5 V + 0.004% * 10 V
0.0006 V + 0.0004 V
0.0010 V
Thus, the actual reading range is 5 V ± 1 mV or from 4.999 V to 5.001 V.
DC current, AC voltage, AC current, and resistance calculations are performed in exactly the same
manner using the pertinent specifications, ranges, and input signal values.
