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| The cal # on the flow meter is a suggested starting point. I had to replace the flow meter once on our old sprayer & once on the one we have now. All fout had "700" as the cal# stamped on them. I had to recalibrate everyone.
For the "OP". Your manual should tell you haow to calibrate your flow meter. For "flying by the seat ofyour pants". If you know how much water you put in and what you sprayed out. Divide the amount sprayed out by the amount put in. That will give you a percentage of error. Divide your flow meter cal# by that percentage . If applying light increase your cal# by the result. If over applying decrease it that much.
I agree with Ron, it shouldn't matter what you are spraying. I have sprayed 28%+ chemicals, a 50/50 mix of 28 & water plus chemicals, and straight water & chemicals & my flowmeter had always read the same
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Raven flow meter cal question
