Flow Meter Calibration - USC LPX300 Operator's Manual

The following steps illustrate how to calibrate a flow meter on an LPX manual series
seed treater. You will need a stopwatch for this calibration
1. Determine a desired flow rate
EXAMPLE: The seed treatment slurry rate is 5 ounces per cwt.
2. Set the Liquid Flow Rate. Make sure the chemical is diverted back into the mix
tank, then using the Liquid Adj. dial, increase or decrease the pump speed until the
liquid flow rate has been matched.
3. Begin the calibration process by pumping chemical into the calibration tube or a
measuring cup and using the stop watch to start timing once the liquid reaches the
zero mark on the calibration tube.
4. Note the rate that the flow meter display on the pump stand is currently reading.
EXAMPLE: Flow meter reading = 54 0z./min
5. After approximately one minute, simultaneously stop timing and shut down the flow
of liquid to the calibration tube or measuring cup.
6. Note the total ounces of liquid in the calibration tube or measuring cup and the total
amount of time that it took to fill the tube to that level in seconds. Divide those two
numbers to find the ounces per second (Oz./Sec) of liquid application rate. Now
multiply the ounces per second of liquid application rate by 60 to get the ounces
per minute (Oz./Min) liquid application rate. This number is the actual amount of
ounces per minute that the pump is currently pumping.
EXAMPLE: Total ounces of liquid in the calibration tube = 57 ounces.
LPX SEED TREATER

FLOW METER CALIBRATION

Seed Flow Rate = 10.8 cwt/min. x 5 oz./cwt. = 54 oz./min.
54 oz. is the rate the pump should be pumping in one minute.
Total amount of time to fill calibration tube = 62 seconds.
Oz./Sec liquid application rate = 57 ounces / 62 seconds = 0.9194
Oz./Min liquid application rate = 0.9194 x 60 seconds = 55.16
The actual liquid application rate is 55.16 Oz./min
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