FLOW RATE CONVERSION   WITH PRECISION
          UNITS:  
   
FREEMAN FLOW FORMULA (IP)  
n number of outlets flowing        
C coefficient of discharge       -  
∆C uncertainty in coefficient of discharge      
-  
d opening diameter measurement       in  
∆d precision of diameter measurement (confidence)      
in  
p pitot gauge measurement       psi  
- pitot gauge size (range)      
psi  
∆p pitot gauge calibrated tolerance      
-  
Q simplified calculated flow rate
using significant digits 		  Q = 29.84 x n x C x d² x √p   gpm  
     
∆Q flow rate range by error propogation   ∆Q = Q √[ (∆C/C)² + (2∆d/d)² + (0.5∆p/p)² ]   gpm  
     
Q calculated flow rate with error       gpm  
     
                   
FREEMAN FLOW FORMULA (SI)  
n number of outlets flowing        
C coefficient of discharge       -  
∆C uncertainty in coefficient of discharge      
-  
d opening diameter measurement       mm  
∆d precision of diameter measurement (confidence)      
mm  
p pitot gauge measurement       bar  
- pitot gauge size (range)      
bar  
∆p pitot gauge calibrated tolerance      
-  
Q simplified calculated flow rate
using significant digits 		  Q = 0.666 x n x C x d² x √p   L/min  
     
∆Q flow rate range by error propogation   ∆Q = Q √[ (∆C/C)² + (2∆d/d)² + (0.5∆p/p)² ]   L/min  
     
Q calculated flow rate with error       L/min