With the Ruler tool, the user can easily measure distances, amplitudes, intervals and other relevant parameters on the chart.

The Ruler tool is selected through a button located on the toolbar of the chart viewer form.

When selected, the mouse pointer changes to a large cross to mark the region of measurement.


The tool is operated by clicking on the selected point in the chart and dragging the selection to reach the desired point of measurement as described below:


  1. when clicking, a rectangle marquee is established at the originally clicked point


  1. the marquee will extend following the mouse movement till the button is released; during the mouse movement two indicators pop-up to higlight the distance travelled from the original point.


The horizontal distance represents the time elapsed in seconds (with minutes in brackets).
The vertical distance represents the difference in voltage, current and temperature between two points on the chart.