Precision refers to m/z values and is defined here as the position of the last digit relative to the decimal point that is displayed. Precision settings are only used for the display of m/z values and peak positions on the m/z scale. In contrast to resolution, precision settings are ignored in all calculations as the highest possible precision is always used. To assure the correct display of m/z values, the precision must be set to the same or a higher order than the resolution.

Note:
When dealing with experimental spectra, some of the digits of the displayed m/z values may not be significant.