The measuring range of a measuring instrument or measuring device is the range in which the displayed or read measured value does not exceed a specified error limit. It is the range with the measuring accuracy defined in the measuring instrument. Outside the measuring range, the specified measuring accuracy is not maintained.
The measuring range is a standardized value range with which the measured value and its unit are adapted to the measuring sensitivity of the measuring instrument. For a voltage measurement, the measuring range is voltage-related, for current measurements it is current-related and for resistance measurements it is resistance-related. The size of the measuring ranges is adapted in steps by voltage dividers or modified bridge circuits.
The accuracy specification of the measuring range corresponds to the marked display range of the measuring instrument, whereby the accuracy specification usually refers to the measuring range end value. The display range is the range between the smallest and the largest displayed value. It can be subdivided linearly or non-linearly, whereby the scale subdivision has different distances from each other in the case of non-linear subdivision. The display range can be increasing from left to right, or vice versa from right to left, or have a central zero position, so that the scale pointer moves in both directions. A measuring range also does not necessarily have to start at zero, it can only represent a partial range, for example from 0.2 volts to 1.0 V.