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NW Iowa | If I'm calibrating my flow meter by the seat of my pants and its reading too low, do I raise or lower the cal number to get it to read higher? |
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Sw Minnesota | If you lower the cal number it will read higher speed and more acres. (I think.) I usually change the cal number by a lot and watch then speed read out. If it reads much faster equals more acres. Hope this helps. |
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Sw Minnesota | Oops my bad. You said flow meter not raven display. Lower flow meter number means more gallons read out. |
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Hudson, South Dakota | The flow meter should have a cal number on it you do not calibrate it. |
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Eastern Nebraska | I was going to ask the same question. Ours is saying its putting more gallons out than it actually is. Should it be the same from water to 32%? |
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SWMN | Water and 32% don't flow the same. Red Blood you would have to make the number bigger |
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| I think 32 is 1.13 times more dense than water, but that is a vague memory. The teejet catalog and charts show a density conversion calculation to convert what is actually going out your tips when spraying a solution like 32 as compared to water. Raven might have that in their catalog too.
fwiw
Art |
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Bethany, MO | It will take more PRESSURE to push fertilizer, but the flowmeter cal will be the same. The volume of a gallon of water is the same size as a gallon of fertilizer. Different tips maybe, to maintain the same pressure, but not different cal #. |
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Chebanse, IL..... | I'm pretty sure that a flow meter like the Ravens does not care what is being pushed thru it, molasses or gasoline, or anything in-between....it will measure the same gallon without any factoring. The "factor" you mention has to do with the pressure needed to force those liquids thru a hole, like a nozzle or a hose. So, even though it might take 2000000# of pressure to force that molasses thru the flow meter, the cal # should be approximately the same. Now, one's personal in-field gallon-pound-etc results could be different, so a slight amount of tweaking to the flow meter cal could be necessary. But again, I'm sure you normally don't have to re-calibrate for products. It is possible that the flow meter can get something caught on the vanes which could affect the initial calibration, but not very likely in my experience. That's a "here" thing. |
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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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WC Iowa | the way i keep it strait is the flow meter calibration # is how many pulses it takes to count 10 gallons of product, so if you increase the pulses per 10 gal that means more product will flow through before it thinks 10 gallon has passed. |
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Raven flow meter cal question
