Product rate by weight too low, too high, or impossible

What to do when a product dosed by weight — by an electric motor or a weight-controlled dispenser — misses its target rate, or cannot reach it at all.

These alarms are raised by the system as a whole, not by one device. They exist for each of the four products separately: the number in the message is the number of the product. How far a product may stand from its target is “Product rate error,%” in the “Settings” menu (The Settings menu). How the window works: How alarms work.

“Rate of Product 1” / “is to low!” — or — “is to high!”

The same for Product 2, 3 and 4. The panel writes the message in this spelling.

What it means. The product is applied below or above its target rate in kilograms per hectare by more than “Product rate error,%”.

Product metered by an electric motor — check, in this order:

1. The target rate of the product.
2. The speed limits in force, on the status screen of the speed sensor — see The sensor status screen.
3. The settings of the electric motor that drives the dispenser shaft — see Dispenser electric motor.
4. The metering unit.
5. The rotation sensor of the electric motor is serviceable.
6. The working load of the motor. Below 20 % or above 80 %, try a metering roller of another size: a larger one if too little is applied, a smaller one if too much.
7. Calibrate the metering roller — see Calibrate a metering motor by weight.

Dispenser sensor with “Weight control” switched on — check, in this order:

1. The target rate of the product.
2. The settings of the dispenser shaft sensor — see Dispenser shaft sensor.
3. The metering unit.
4. The dispenser sensor is serviceable.
5. Calibrate the dispenser — see Calibrate the dispenser by weight.

“Product dosage is” / “impossible! Check product” / “rate and calibration!”

What it means. With the current settings and target rate, the product cannot be applied by weight at all: the lowest speed at which the metering rollers can deliver the rate is already at or above the highest. On the home screen a red product icon blinks in the right-hand column.

What to check, in this order:

1. The target rates of the products — one product asking too much closes the window for all of them.
2. “Min speed, km/h” and “Max speed, km/h” of the speed sensor — see Travel speed sensor.
3. The settings of the electric motors that apply the products by weight, above all “Minimum, rpm” and “Maximum, rpm”.
4. Calibrate the metering rollers of the electric motors.
5. If that does not help: fit metering rollers of another size.

Something your machine does that this page does not answer? Write to support@agriwelt.com — an engineer answers.