Nova-Tech LMI Roytronic Excel Series AD Metering Pump - Manual (Page 20)

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OPERATION
4.3.2 Calibrating the Displayed Flow (AD2, AD8)
The Roytronic Excel Pumps are equipped to display a theoretical flow rate based upon
the pump’s stroke speed and stroke length. These calculations are based upon factory
test conditions which may be significantly different from your application. It is necessary
for the user to perform the following calibration procedure when the pump is connected
to your system, and using the actual chemical. This one-point calibration procedure will
greatly improve the accuracy of the pump’s calculated flow. The closer the pump’s stroke
length is to the typical use stroke length, the more accurate the result. We recommend
using the approximate settings determined in section 4.3.1 as a starting point for
calibration.
1. Prepare a flow measuring device such as a graduated cylinder or a scale sensitive to
a gram.
2. Ensure the pump is primed following the procedures in 4.2.
3. Put the pump into Internal Mode and use the Power Button
to turn the pump
off.
4. Hold the Up Button and Down Button in at the same time for 8 seconds until
‘CAL’ is displayed on the LCD Display, then release the buttons. Note ‘FLO’ will
be displayed first. Continue to press the buttons until ‘CAL’ is displayed.
5. Push the Power Button and release until a “0” is displayed.
6. Note the reading on the calibration device. If using a graduated cylinder note the
starting liquid level. If using a scale note the displayed weight, or reset the scale’s
display to zero.
7. Push the Power Button and release to start the pump. Notice that the display will
count the total number of strokes. (The screen will show SPH).
8. Allow the pump to run; the accuracy will improve with more strokes. Use the Power
Button to stop the pump. The number of strokes will be displayed up to 999
strokes. If you will be pacing the pump externally, note the number of strokes.
9. Press and release the Power Button again. This will display the pump’s estimated
volume pumped in mL. (The screen will show ml/h).
10. Use the Up and Down Buttons to match the displayed volume to the measured
volume. If using a graduated cylinder, the presence of the tubing will cause the
measurement to be slightly higher than actual. The measurement should be adjusted
using the formulas shown below. If using a scale, the number of grams can be divided
by the specific gravity of your chemical to determine the number of mL pumped. If
the pump will be controlled externally, the output volume per stroke can be determined
by dividing the measured output by the number of strokes.
11. Once the displayed value has been adjusted, hold and release the Power Button
to return the pump to internal mode.
where
For accuracy, it is important that the water level does not drop below the top of the
ceramic foot valve weight.
Note: If you will be using the pump at a different stroke length, or pressure, the pump
should be recalibrated under those conditions using the procedure above to ensure
accuracy.