Description
DESCRIPTION OF THE DPA SENSOR BOX
- The double-tank DPA sensor regulates the seed flow rate in relation to the advance in kilometers/hour of the tillage tool (DPA system), continuously in sowing mode. At the end of the field, distribution stops automatically, gradually, as the tool is raised and the tool wheel no longer turns. If you wish to stop distribution directly, you can add 2 optional lift cut-off switches to be positioned on the lift.
- This is a flow system proportional to mechanical advance, using a sensor positioned on a rotating part of the tool (roller, disc, wheel, etc.).
- The DPA sensor system is equipped with a control light and a cab-mounted control box that incorporates the functions of DELIMBE seed drills. It is fitted with switches for memorizing speed and starting seeding at the end of the row.
The DPA CAPTEUR consists of :
- A control box with 2 flow adjustment potentiometers,
- On/off switch to control dispensing,
- An on/off switch to control the blower,
- A priming switch to operate the system without moving it forward (e.g. for weighing),
- A memorized speed switch, to save a setting (the desired speed).
- A position sensor to be fixed on a rotating element. Cable length is 8 meters.
- Power supply harness included with the box: The box includes a 3-pin plug for power supply to the tractor with a 1.5-meter harness and a 7-pin plug for connection to the unit with a 7-meter harness.
HOW TO USE THE DPA SENSOR
- Place the sensor with a metal stud at the end of the roller, the wheel of a tool or tractor, the back of a disc, etc. (a rotating element). It must be in a static position. A rotating metal object, such as a bolt, should be positioned between 5mm and 10mm from the sensor. The diameter of the impeller is not necessary for flow calculation, as the DPA works on the basis of rotation frequency.
- It’s best to use the setting chart supplied with the unit to adjust the DPA.
DPA BOX ADJUSTMENT BY SENSOR
Make the following calculation to obtain a setting in kg/hour:
Speed x Working width x Dose per hectare = Kilogram per hour.
The result obtained enables you to weigh in a minute to obtain grams/minute and check the correct dose setting. This weight must then be converted into kilograms/hour.
To do this, hold your finger on the priming button for one minute. The spline will then rotate to the desired setting.
If over- or under-dosing is detected during weighing, the potentiometer setting must be changed and weighing repeated.
Once a setting has been made on the in-cab potentiometer, turn on the on/off switches to start the blower and distribution. The tractor must be travelling at the set working speed for the DPA to receive speed information. When this working speed is reached, press the memorized speed button. The green LED starts flashing. When it stays on and stops flashing, this means that the DPA is working. The dose is therefore even, whatever the tractor’s forward speed.
For more details on features, click on the “product details” tab just above the description.
