Badger Meter B3000 - Manual (Page 39)

Programming Manual
Page 39 March 2014
Example 3
Known values are:
Velocity
= 4 3 ft/sec
Inside Diameter of Pipe = 3 068 in
Find the area of the pipe cross section
2
 
 
 
3.068
2
Area = πr 2
Area = π = π x 2.35 = 7.39 in 2
Find the volume in one foot of travel
88.71in 2
7.39 in 2 x 12 in. (1 ft)
ft
=
What portion of a gallon does one foot of travel represent?
= 0.384 gallons
88.71 in 3
231 in 3
So for every foot of fluid travel 0 384 gallons will pass
What is the flow rate in gpm at 4 3 ft/sec?
0 384 gallons × 4 3 FPS × 60 sec (1 min) = 99 1 gpm
Now that the volumetric flow rate is known, all that is needed is an output frequency to determine the K factor
Known values are:
Frequency = 700 Hz (By measurement)
Flow Rate = 99 1 gpm (By calculation)
700 Hz × 60 sec = 42,000 pulses per gallon
K factor
42,000 pulses per min
99.1 gpm
423.9 pulses per gallon = =