Accuracy is the largest allowable error that will occur under specific operating conditions. In other words, it is an indication of how close the DMM’s displayed measurement is to the actual value of the signal being measured. Accuracy for a DMM is usually expressed as a percent of reading. An accuracy of 1% of reading means that for a displayed reading of 100.0V, the actual value of the voltage could be anywhere between 99.0V and 101 .0V. The term precision is also commonly used in multimeter specifications and is often confused with accuracy. A useful way to compare and differentiate precision and accuracy is to use an arrow cluster on a target as a comparison. Accuracy describes the closeness of arrows to the bulls-eye of the targets center. Arrows that strike closer to the bulls-eye are considered more accurate. If a large number of arrows are fired, precision would be the size of the cluster one would expect if this was repeated many times under the same conditions.