Duncan Enviro DD30 Owner's Manual - Page 12

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Seed Calibration (continued)

10 Touch tick again. Touch OK. Touch tick to accept to return

to the Bin/Tank screen. Touch the 'home' icon to return to

the main screen.

11 Note that you may manually enter a calibration factor

by touching the Manual Cal button. This is used when

the wrong factor is entered and a value is needed to get

the motor to turn again. Use 2000 for seed and 650 for

fertilizer as a starting point. Tick to accept and tick again

to return to the Bin/Tank screen. Touch the 'home' icon to

return to the main screen.

Note that at any time, the system may be returned to

Factory Settings using the supplied USB memory stick.

Calibration Deviations

Deviations Between the Calibration Test and the Actual Seed Rate

Changes in the flowing properties of seed during sowing often cause changes in the relationship

between the calibration test and the seed rate. These changes in flowing properties generally result

from reactions of the dressing agents to temperature, humidity or abrasion.

Residues from the seed dressing on the metering wheels can also influence the flowing properties

of seed and hence the seed rate. In such cases a balance will occur only after a period of time, and

it is recommended that the calibration test be repeated, nominally when the seed box is half empty,

to confirm the seed rate after 2-3 seedbox fillings. Only then will a balance occur and the seed rate

stabilise.

'Enviro DD30'

Calibration