Hello,

I need some help! I'm trying to count the number of times a specific
pressure is not just reached, but maintained for a certain time period. I
have a trend list where a measurement program has dumped data into Excel for
certain points in time. For example:

Column A Column B Pressure
1/1/08 11:29AM 53.50
1/1/08 3:29PM 83.76
1/1/08 7:29PM 89.54
1/2/08 11:29PM 50.12

So, what I need to be able to do is count the number of times that the
pressure not just goes above 80, but stays there for at least 8 hours, let's
say (so it would not count the above example, because it only stayed above
80...which I realize is not a perfect example because they're 4 hour
increments and it could have theoretically stayed above 80 longer...anyway).
Any ideas? Any help is appreciated--thanks!