Operating Characteristics of Vacuum Meter

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The operating band (gray area) shows the relationship of the vacuum meter with the desired population (indicated by the horizontal line).

The breadth of the band is due to:

  • Different seed sizes and shapes
  • Variations in planting rates
  • Soil conditions

In the majority of cases, the planting precision of the vacuum meter does not decrease, unless the maximum planting speed is surpassed.

Maximum speed in relation to vacuum meter is often the result of ground conditions. Uneven surfaces can knock the seeds out of the seed disk and shake up the row units, seriously affecting seed placement. Calibrating tire pressure correctly can help to improve seed placement performance on uneven surfaces.

NOTE: Vacuum charts only serve as parameter for initial adjustment. There might be variations according to seed type, size, density and treatment.

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