Namely: the actual number - set number = fall (this fall meter batching machine can automatically correct)

Tare (zeroing)

This reference point can be zero point value when any temporal scales measuring instruments are measured at the reference point to the start of a measurement, can also be a non-zero value when empty scale point (such as residual materials or cumulative measure when infighting The actual value of the materials of the former), this non-zero value point can be manually or automatically treated as zero (starting reference point by the time the next measurement and control instruments)