![]() ![]() If rejected, the system continues at the previously calibrated numbers. If accepted, the system automatically calibrates to the new MDV. The operator can accept or reject the new MDV. At that time, the data points are calculated and a new MDV with percent difference is displayed on screen. When enough product has been metered out, typically after about 3.2 to 4.9 ha (8 to 12 acres), the Gen 4 CommandCenter will prompt the operator to stop when convenient to do so. The operator engages ActiveCal while stationary by selecting the button on the screen and then begins seeding. However, the preconfigured MDV will be a good starting point for growers who do not wish to manually calibrate. An initial manual calibration will give the most accurate MDV to start with. Based on information entered into the work setup page, a preconfigured meter displacement value (MDV) will populate per meter. The process to calibrate the implement starts with the CommandCenter™ Display in the work setup page, where the operator defines product types, rates and selects meter rollers. A number of variables, including product weight and changing climate conditions throughout the day, will have an effect on any volumetric metering system with the John Deere ActiveCal system, calibration can be done from the cab of the tractor, while seeding, to minimize the variation in product metering. ![]() The more frequently calibration is completed, the more accurate a seeder will be.
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