When the UTM is switched off why does the dial gauge reading reset backGive reaso.?

When the UTM (Universal Testing Machine) is switched off, the dial gauge reading resets back due to the mechanical design of the gauge. Most dial gauges operate with a spring mechanism that returns the pointer to a zero position when the machine is powered down. This is done to ensure accurate measurements upon reactivation and to prevent damage to the gauge during power fluctuations. Such resetting helps maintain the integrity and reliability of subsequent tests.