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Zero Adjustment
The ability to adjust the display of a process or strain meter so that zero on the display corresponds to a non-zero signal, such as 4 mA, 10 mA or 1 VDC. The adjustment range is normally expressed in counts.
Zero Drift
The maximum deviation from zero reading of a meter having zero input over a given temperature range. Expressed as a percent of full scale reading per degree centigrade.