11.3.2 Calibration of the amount of delivered seed

Go to calibration by selecting Settings/Calibration. Select seed.

Figure 1.

Display

  1. Air pressure

  2. Feed quality

  3. Number of skips

  4. Number of doubles

  5. Feed for filling the feed system.

  6. Number of seeds/ha or seed spacing (depending on calibration method)

  7. If the calibration is to cover all row units, select ON

  8. Amount of seed

  9. Select calibration method, specify number of seeds.

  10. Select calibration method, specify distance between plants

  11. If the expected driving speed is, e.g., 12 km/h, the calibration must be done for 12 km/h

  12. Select which of the row units is to be calibrated.

  13. Enter the number of holes on the seed disc in the seed meters. If the disc contains more than 70 holes, deviations from the specified feed rate are measured in percentages instead of in skips/doubles

Calibration menu settings (Values are displayed either in metric or imperial units, depending on which one has been selected in the general settings menu).

Note

To choose the seed disc and settings for the metering unit, refer to the chapter “Drilling Recommendations” in the machine manual.

  1. Set the required percentage increase/decrease rate in feed volume in the application rate field. If you select, for example, 5%, the application rate will change in increments of 5% every time the button is pressed in the operations menu.

  2. Set the speed for which the machine is to be calibrated. If the expected driving speed is, for example, 12 km/h, the calibration must be done for a speed of 12 km/h.

  3. Select which of the row units is to be calibrated (i.e. the row that has a calibration bag). If the calibration is to cover all row units, select ON (default setting).

    If calibration is to be carried out individually for only one row unit, select OFF.

  4. Enter the number of holes on the seed disc installed in the seed feed housing.

  5. Select calibration method. Enter the spacing between plants in the upper row or the number of seeds in the lower row. (The selected calibration method is shown in the operations menu.)

  6. Calibrate

Calibration

Note

Check that there is seed in the seed hopper; the depth of seed should be at least 15 cm.

The calibration is normally carried out on one seed feed housing unit and the values are automatically carried over to the others. If desired, it is also possible to calibrate each seed meter individually.

  1. Position a calibration bag under the feed for the seed meter to be calibrated.

  2. Start the fan; the value is shown in field (A). See Figure 1. Check that there is the right amount of air pressure (3.5 kPa) in the seed feed housing.

  3. Enter the values in the calibration menu.

  4. Start the calibration with the button and hold it in until the indication for amount of seed delivered is showing at least 200.

  5. Read off the proportion of skips and doubles . If any value is too high, adjust the singulator.

    • To reduce the proportion of doubles, reduce the singulator dial’s set value.

    • To reduce the proportion of skips, increase the singulator dial’s set value.

    Repeat points 4 to 5 until the required accuracy has been achieved.

  6. You can exit the calibration menu using , or go directly to calibration of another unit.

  7. Remove the calibration bag and pour the seed back into the hopper.