# Zero Relative Resistance

| The relative resistance display mode allows you to plot the data as a resistance shift from a reference point. That is, the resistance is plotted relative to a reference resistance which you set via the Zero Rel R button. Whenever you click this button, the current resistance measurement is then used as the reference resistance against which all other resistances are plotted.

Another thing the button does is store a tag value in the log file. This value is also plotted on the screen.
Note that the software does not re-calculate the data already plotted relative to a new reference resistance. Only new data is plotted against the new reference resistance.
If you ever become confused as to what the data has actually done while using the relative resistance mode, you can always change the Frequency Display Format Selector to Raw Resistance. The raw resistance display is completely unaffected by changes in the relative frequency plot.