The resolution of a DVM indicates the number of digits in the display. Constant errors are any errors that remain constant over the full range of the instrument. Such errors are expressed in terms of the number of digits or the percentage of full-scale reading (or range). Proportional errors are errors that are proportional to the magnitude of the digital proportional errors expressed in terms of a percentage of reading. Most manufacturers specify the accuracy of a DVM in terms of a combination of constant and proportional errors. For example, the accuracy of a DVM may be expressed by such combinations as " 0.01 percent of reading t percent of range or as "t0.05 percent of reading digit." As an example, if 5.000 is measured with a four-digit DVM accuracy is "0.01 percent of reading whose maximum error is 0.01 percent of 5 v 0.001 v, or resolution of a DVM is important because the resolution should greater than the accuracy of the be meter. For example, requires an instrument which has a resolution of five digits able measurements to be made to 0.01 percent over 90 percent of the total dynamic range of the meter. However, it cannot be automatically assumed that a DVM with a six-digit display has a greater accuracy than a meter with only five digits in the display (even though its resolution is greater).The specifications of both instruments must be examined before the accuracy of either meter is known with certainty.