LMI RFP Series, Instruction Manual, Page: 6 / 12

6
Example D:
5. DETERMINE DIVIDER NUMBER
NOTE:
If an LMI D7 metering pump is being used, multiply value
(D)
by 75% to determine correct Divider Number.
*GPM
=Gallons per Minute
*GPH
=Gallons per hour
*LPM
=Liters per minute
*PPM
=Parts per million
*PPPUSG
=Primary pulses per U.S Gallon
NOTES:
• To make small increases or decreases in output, adjust the stroke knob.
• Increasing the divider box number will decrease the pump speed (strokes per minute).
• Decreasing the divider box number will increase the pump speed (strokes per minute).
• Dilute pumping solutions when low PPM concentrations are required. This will allow you to increase the pump
speed (strokes per minute).
6. SET THE DIVIDER NUMBER
A. Remove the clear window on the programmable divider by removing the two black thumb screws.
B. Set thumbwheel numbers to divider number determined above.
Example :
Using the divider number determined in the previous example (divider number = 0011), you would set the
thumbwheels as illustrated below:
C. Replace the clear window to activate divider.
IMPORTANT:
DIVIDER WILL NOT OPERATE UNLESS CLEAR WINDOW IS IN PLACE.
Example Result:
Round off the divider number to read
(E)
0011
on the divider unit. The resulting divider number will cause the
pump to run at 87 strokes per minute at the maximum flowrate of water through the flowmeter.
X
87 (D)
13.3 ( PPPUSG* ) 70 ( GPM* )
=
(E)
10.7
Divide number
(round off to nearest
whole number)
Primary pulses per
U.S. gallon (from chart)
Max. flowrate of water through
flowmeter (in GPM *)
X
Strokes per minute of pump
(expressed as a whole number)
=
(D)
Divide number
(E)
0 0 1 1