EFM Trend Commands

The following selections appear under the EFM Trend Menu.

Min/Max

The minimum and maximum values for the y-axis of the active chart are displayed in a Quick View box and entered on a Min/Max tab. The Min/Max function does not operate on the y2-axis, if one is displayed.

Average

The average value for the y-axis of the active chart is displayed in a Quick View box and entered on an Average tab. The Average function does not operate on the y2-axis, if one is displayed.

Options

Choosing this selection displays a dialog box with the choices listed below. The options presented here apply only to EFM Trend data. NOTE: The default unit for Corrosion Rate is not selected here: It is selected under the Tools>Options menu.

Units for Time

Time may be displayed in Days/Hours/Minutes/Seconds or Custom. Under Custom, you may enter the Name of a custom time unit and the factor relating it to seconds. For example, if hours were defined as a custom time unit, the name might be "hour" and the correct factor would be "3600", because there are 3600 seconds in an hour.

A check box allows the time unit defined here to also be used for Open Circuit Potential data.

Data Grid

Checking this box produces a "Grid Table" for the data presented on the EFM Trend charts. This grid contains the point number, time, Rp, Corrosion Rate, Causality Factor 2, Causality Factor 3, Corrosion Current for each point on the EFM Trend Charts. Depending upon the Corrosion Type selected, either the anodic, cathodic, or anodic and cathodic Tafel constants are also listed.

Save as Defaults

The changes that you have specified become the default for the analysis and display of all new EFM Trend data files.

Apply

Apply these changes to the current data displays. The data files are re-loaded and any analyses that have been performed are lost.

Close

Close the Options dialog box.