Near Intersection of I-35 & I-90 Southern Mn. | The Raven 60P should have a tag on it. It should have a suggested value for both English and Metric measures. Since the 60S could be used for NH3, it would have an NH3 meter cal. Since the 60P can only be used for liquids it should have a meter cal for English Gallons and a different one for Metric Liters. Divide the suggested number Metric meter cal number by 10 and enter it. Make small adjustments to it if you find that it is in the ballpark but not quite correct.
The flow meter turns in response to liquid flowing through it. Magnets on the turbine pass by a sensor which creates shorting pulses to the signal line which is normally held at a logic "HIGH" due to a pull up resistor. As the turbine spins it creates pulses which are directly related to the flow passing through within an acceptable range. Different sized flow meters are available for different flow rates. My Hagie uses a 100P.
The electronics watches for these pulses and literally counts them. A meter cal is used to convert the number of these pulses into useful units.
Here in the U.S. where we use our archaic units of gallons we want the Volume measurements to be in terms of gallons so an appropriate meter cal is used. Since you are likely wanting to work in terms of liters you need a different meter cal so that the value shown is in metric terms.
Since early Raven electronic controllers only worked in whole numbers, it was decided long ago that the Raven meter Cal would represent the number of pulses produced when 10 units pass through the flow meter. The Ag Leader systems expects the meter cal to represent the number of pulses produces a 1 unit passes through the flow meter.
If you were using a Raven controller you would enter either the English or Metric Meter Cal suggested on the tag. Since you are using an Ag Leader system, the meter cal on the tag needs to be divided by 10.
The initial suggested value divided by 10 should be reasonably close and can be fine tuned using the formula in the other post. If the volume is off considerably this could be an indication of a problem within the flow meter such as debris or wear.
Edited by tedbear 3/21/2024 15:07
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Issues regarding Raven flow meter calibration
