Duncan Enviro 740 - Calibration Calculations and Conversions; Hand Crank Turns for Calibration

19
Pt. No. 67304
Issue 1217
Machine Row Sowing Size Spacing
Width (m)
15 Run
150 2.25 49 197 Hign
17 Run 130 2.21 50 200.5
Speed
15 Run 150 2.25 30.5 122.5
Low
17 Run 130 2.21 31 125
Speed
19 Run 150 2.85 39 155.5
High
21 Run 135 2.84 39 156
Speed
19 Run 150 2.85 24 97
Low
21 Run 135 2.84 24.5 97
Speed
23 Run 150 3.45 32 128.5
High
26 Run 130 3.38 32 129
Speed
23 Run 150 3.45 20 80
Low
26 Run 130 3.38 20 80
Speed
Number of Hand Crank Turns for Seed Rate Calibration
9 Weigh the seed collected during the test in kilograms.
10 Calculate the seed rate by multiplying the kgs previously
collected x 40 (1/40th ha method) or x 10 (1/10th ha
method) depending on requirement. If the resultant
calculation does not produce the desired seed rate use
the enclosed seed rate calculator disc to determine the
correct gearbox setting.
Refer Use of Seed Rate Calculator P 20.
Suggestion To be on the safe side and until confidence
has been gained with the method of calibration it is advisable to
conduct a second test at the newly determined gearbox setting.
11 Where a coated seed is used it is advisable to check the
calibration after 1 hectare as dressings can tend to create a
coating on the seed metering wheels thus changing the the
flowing properties of the seed which in turn alters the seed
rate.
Calculating Number of Hand Crank Turns for
Other Working Widths
1 For clutch output sprocket of 19 tooth and gearbox input
sprocket of 15 tooth (standard High Speed Setting)...
Constant = 0.443
2 For clutch output sprocket of 15 tooth and gearbox input
sprocket of 19 tooth.(Low Speed Setting)...
Constant = 0.276
Crank Turns =
Area in Metre
2
x Constant
Working Width
For
1
/
40
Hectare (250 m
2
) Calibration
Seed Rate = Actual Seed Collected (kg) x 40
For
1
/
10
Hectare (1000 m
2
) Calibration
Seed Rate = Actual Seed Collected (kg) x 10
Speed Setting
Gearbox Clutch
Sprocket Sprocket
High Speed
15 Tooth 19 Tooth
(Standard)
Low Speed 19 Tooth 15 Tooth
Turns for
1
/
40
Hectare
Turns for
1
/
10
Hectare
Speed Setting
(Refer Above)
fig 19