1.4. Setting of the dosing speed
The powder dosing rates depend on the powder properties and the DOSER motor rotation speed.
The speed of powder addition is selected by the control buttons Λ Λ Λ under the LED display. The digital selection allows for good reproducibility of the selected dosing rate.
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| Figure 1-13: Choosing the speed of powder addition with the help of control buttons Λ Λ Λ. | Figure 1-14: Pressing On/Off button on the motor unit after choosing the dosing speed. |
Since specific densities of solid substances vary considerably, it is important to calibrate the DOSER before starting the powder dosing. For this, the amount of substance delivered during a certain time period is measured (e.g. for 1 minute with speed setting 500). The speed of rotation of the distributor increases progressively with the speed setting value. Using this information the speed setting corresponding to the desired flow rate of the solid substance can be calculated easily (rule of three).
The dosing of the powdery substance is started by pressing the ON/OFF button. The corresponding LED indicates that powder dosing is in progress.