Verify Metering-Field Method

IMPORTANT: Ground speed sensor and tank meters must be calibrated prior to doing field check. Refer to AIR CART SET-UP MODE-CALIBRATE TIRE SENSOR in Operating Machine-Monitor Setup section and AIR CART SET-UP MODE-CALIBRATE METERS in Operating Machine-Monitor Operation section.

1. Determine target application rate for the product in use.

2. Check that existing meter segments can deliver product at desired rate.

3. Make sure there is sufficient product in tank to collect a measurable sample. Product should cover all meter inlets and not be heaped to one side. Half-width disconnect handles must be fully down for accurate rate verification.

4. Meter cartridge assembly must be full of product at the start of the procedure.

IMPORTANT: With variable rate option, for the correct transmission setting and rate desired, seeding must take place for a short distance BEFORE THE CHECK in order to let the variable rate define a transmission setting.

5. Set transmissions to the recommended transmission setting given at the end of each tank calibration.

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6. Hang empty bag (A) from scale (B) and reset scale to "0" (zero) by turning knob on top of scale. Setting scale to "0" (zero) will ensure that measured weight is of collected sample only, and does not include the weight of the bag.

NOTE: Calibration distance is the distance a given machine width must travel to cover one hectare (acre).

7. Find "calibration distance", for your seeding tool width, by referring to Meter Verification Distances Chart or by calculating using the following formula.

FORMULA:

10,000 sq m (1 hectare) ÷ Seeding Tool Width (m) = Calibration Distance

43560 sq ft (1 acre) ÷ Seeding Tool Width (ft) = Calibration Distance

EXAMPLE:

10,000 sq m (1 hectare) ÷ 13.7 m tool = 730 m

43560 ÷ 45 ft tool = 968 ft

If this distance is driven, one acre will be seeded.

8. Take the desired application rate and either divide or multiply by 2, 3, 4, 5, 6 or 8 to achieve between 4.5 kg to 15.8 kg (10 lb to 35 lb) in the collection pan.

EXAMPLE:

Milo-3.4 kg/hectare x 2 = 6.8 kg or 2 hectares worth of seeding

Milo-3 lb/acre x 4 = 12 lbs. or 4 acres worth of seeding

EXAMPLE:

Wheat-83.9 kg/hectare ÷ 6 = 14 kg or 1/6 of a hectare worth of seeding

A41554


A-Collection Bag
B-Scale

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Wheat-75 lb/per acre ÷ 3 = 25 lb or 1/3 of an acre worth of seeding

9. Determine exact distance to drive by dividing or multiplying the distance (Step 7) by the same number that was used with the product weight (Step 8).

EXAMPLE:

Number of m at 3.4 kg/hectare-730 x 2 = 1460 m should achieve 6.8 kg of product in the collection pan.

Number of ft at 3 lb of milo per acre-968 x 4 = 3872 ft should achieve 12 lb of product in the collection pan.

EXAMPLE:

Number of m at 83.9 kg/hectare-730 ÷ 6 = 121.6 m should achieve 14 kg of product in the collection pan.

Number of ft at 75 lb of wheat per acre-968 ÷ 3 = 322 ft 8 in. should achieve 25 lb of product in the collection pan.

NOTE: The field check accuracy improves by increasing distance driven.

10. Layout the calculated distance. If tractor radar has been previously calibrated, it may be used to measure this distance. The following field conditions are needed:

  • Correct cart tire psi
  • Product in tanks
  • Field ground conditions
  • Normal seeding speed

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11. From any screen press [INFO].

12. From the list given, choose Air Cart.

13. From the list given, choose Meter Rate Verification.

14. Select which tanks to verify.

15. Follow applicable instructions on screen.

  • Turn fan off.
  • Set slide to bottom primaries (Stationary Double-Shoot only).

    NOTE: Before returning to normal operation, ensure slide on stationary double-shoot manifold is in proper position.

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  • Install calibration catch pan.

    Remove cover plate from bottom of manifold.

    Slide collection pan, squared end first, in from left hand side of manifold using the provided rails.

  • Drive at seeding speed for course distance per operator's manual.

    Start driving at seeding speed towards course. When you reach course starting point, press START. When you reach the course ending point, press STOP.

  • Weigh product and calculate per operator's manual.

    Remove the catch pan and pour contents into collection bag.

    A46133

    Catch Pan - SDS

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Hang filled collection bag (A) from scale (B) and weigh product. Multiply or divide the weighed amount by the same number used in Step 9. This will give the actual application rate. It should be close to the desired rate.

16. If calculated application rate is above or below target rate:

NOTE: See your John Deere dealer for assistance, if desired.

  • Verify transmission setting and meter settings are correct for the product in use.
  • Recalibrate cart tire sensor. See AIR CART SET-UP MODE-CALIBRATE SENSORS in Operating Machine-Monitor Set-Up section.
  • Recalibrate meter. See AIR CART SET-UP MODE-CALIBRATE METERS in Operating Machine-Setting Meter Rates section.
  • Verify that monitor is set-up properly.

17. Perform rate verification again to see that corrective action had the desired results and the application rate meets requirements.

18. Return manifolds to normal operating configuration

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A-Collection Bag
B-Scale

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