Difference of accuracy, accuracy and error in measurement
The proximity of a measurement is real. In other words, in the worst case, a set of measurements is close to the real distance.
The proximity of a set of measurements to each other. In other words, accuracy gives us information about the measurement’s repeatability.
The difference is the measured value with the actual value.
A short and very useful video in this field is available for download at the Arshi Control Toolkit.