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Duration curve or load duration curve illustrates the variation of a load with a percentage of time. The load levels, in axis y, are in descending order of magnitude.

Create a duration curve:

On the Properties tab: 

1. Click Visualize > Duration curve in the menu.
2. Select an Record set from the list, if required.
3. Select from the Variable list and to set a variable for Y.
4. Click Save. 

On the Advanced tab: 

1. Enter a chart Title.
2. Enter Font Size, if required. 
3. Select Fill curves to color the area below the curve.
4. Click Save to load the data.

Example Visualization

The following example illustrates the gas pressure of a foam seal is at 223.5 mbar during 50% of the time.