How can the positive peak pressure be calculated as a negative number or zero when there is a value provided for the leakage area required for venting?

The calculation of peak pressures depends on a curve, and when the circumstances are particular, the peak pressures can be very close to zero.  The curve is not optimized in this area, as peak pressures near zero are not a worry.  Integrity makes the value of peak pressure zero when the calculated value using the curve goes below zero, as at this point it does not matter how small the pressure really is.

Previous versions of the software variously showed the positive peak pressure as negative or as a blank instead of a zero. 

- blanks instead of zeros in report are fixed in Integrity versions >
- peak pressures showing negative instead of zero in the UI fixed in Integrity versions >