I don't think you would even need to bother. You should know how much collant the system takes from the book. You fill the sytem as much as you can and then when you run the car the first time the water pump should force the air out and then you add more coolant if needed.
We have done the cooling system on my car and my fathers car, we just filled the system and that was the end of it. Of course the system was rinsed out first with water since I replaced my radiator and my father had to replace his water pump at the times.
Just like when you change your oil. I let the car run a few minutes and then check the level, add more as needed
