Nova-Tech LMI Roytronic Series A Metering Pump - Manual (Page 19)

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OPERATION
4.3.1 Total Pump Output
Calculate the approximate output of the pump as follows:
PUMP OUTPUT = MAX PUMP OUTPUT x % SPEED x % STROKE
Example: A151-928SI
Use Max Output (from dataplate on side of pump) = 1 GPH (1 gallon per hour).
If the pump is set at 60% speed and 70% stroke length, the approximate pump out-
put is:
1.0 x 0.60 x 0.70 = 0.42 GPH.
Multiply by 24 (hours in one day) to calculate in gallons per day. If pump is not equipped
with speed adjustment, calculate by Max Pump Output x % Stroke only.
4.3.2 Calibration in Internal Mode
Once installation is complete and the approximate output has been determined,
the pump should be calibrated to adjust speed and stroke for your actual desired
output. (Calibration cylinders may be purchased from your local LMI distributor,
ref. publication 1798.)
1. Be sure the pump is primed, and discharge tubing and Injection Check Valve
are installed as they would be in normal service (i.e., including factors such as
injection pressure, fluid viscosity, and suction lift).
2. Place the Foot Valve in a graduated container with a volume of 1000 ml or
more.
3. Plug in and switch pump to Internal Mode. Pump until all the air is exhausted
from the suction line and head.
4. Turn the pump off. Refill graduated container to a level starting point.
5. Using a stopwatch or timer, turn the pump on for a measured amount of time
(120 pump strokes minimum). The longer the time period, the more confident
you can be of the results. Be sure to count the number of strokes during the
calibration period when making comparisons.
6. Turn the pump off. Note the time elapsed in relation to volume displaced in
the graduate. Now, calculate the output in the time unit you choose (minutes,
hours, days, etc.).
7. If the output is too low or too great, use the Stroke Adjustment Knob and/or
the Speed Adjustment Knob to fine-tune the amount of flow, estimating re-
quired correction and repeat steps 1-7.
When converting
between different
units, remember
these conversion
factors:
1 Gallon =
3.785 Liters
1 Day =
1,440 Minutes
240 SPM =
14,400 SPH