Hello again Steve,
The base units you should use are Ohms and Farads and Hertz. You can use
other units but you are better off sticking to those alone unless the formula
specifically states otherwise.
You can also look at it in the 'time domain', where you use time t instead
of frequency F. Doing this you would get:
t=R*C {seconds, ohms, farads}
and as you can see it is slightly simpler to think of it this way.
Time t here is the delay time, and because we have R*C on the
right this represents what is called one 'time constant'. One time
constant is the time it takes to reach 63 percent of the total
applied voltage. If rem right you are working with 5 volts, so
this would mean one time constant is the time it takes to reach
5 times 0.63 or about 3.2 volts. If you set the trip point of the
next comparator stage to 3.2 volts then you will be working with
one time constant, and the time it takes to trip will be t in the
above equation.
Maybe you should post your most current schematic so i can
take a look and refresh my mind as to what the circuit looks like
plus get a look at the most current one. I've worked with
people on probably 200 different circuits plus some of my
own since then so it will be good for me to look at yours
anew just to make sure we are doing this right.
I can keep an eye out or you can PM me when you post the
newest schematic or a link.