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By default, the classes are set to the SV-P91 values, but by clicking on the ‘Class’ button, we can modify the values to suit our own needs or maybe contractual definitions for other countries.

Different Values in these Pages

You may be asking why the inclination and delta height values shown in the image at the top of this page do not match with the manually calculated values in the section Understanding the Results?

In the other section we calculated:

• Fall = -0.223 m

• Gradient = -0.97 %

But in the WinCan inclination panel we are seeing:

• Fall = -0.22 m

• Gradient = -1.03 %

The reason for these differences are:

• The difference between -0.223 and -0.22 is simply a decimal place rounding to 2 rather than 3 decimal places.

• The difference in the gradient is because the other page takes the actual measured values for the entire 23 m of the pipe but the inclination test only considers 21.75 m as has been discussed previously. So, if we use the measurement test difference of 21.75 m then we get (−0.223 × 100) ÷ 21.75 = −1.03 % which is what is displayed on the VX panel.