DIGISYSTEM APN20201 Instrukcja obsługi - Strona 6

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STARTUP

• Verify that mains breaker I1 is in OFF position

• Put the potentiometer P3 at about 20%

• Verify switch SW2 (red) lever status (if is up the power supply will start as soon as

supplied, if is down the external start command is required)

• Verify switch SW3 (yellow) lever status (if is up the voltage reference is coming

from potentiometer, if is down the external voltage reference is required)

• Verify if the trimmer P1 (MIN) is rotated fully counterclockwise and if the trimmer

P2 (MAX) is rotated fully clockwise

• Verify that all connections are fastened

• Put rotating switches SW1 at 050.0 if a output frequency of 50.0 Hz is required

• Connect the mains (230 Vac) via PC1 cable (or schuko plug)

• Close mains switch I1; if start command is active the vibrator will be supplied at the

frequency selected with rotating switches SW1 (50 Hz) and at the voltage defined

from potentiometer P3.

In practice, the search of the resonance frequency is made by checking the effects on the

product feeding obtained by regulating the selectors SW1 values.

Usually the resonance frequency is not too far from the rated (for a 50 Hz vibrator should be

between 45 and 55 Hz), but also a little frequency change will determine a significant speed change.

Than, proceed by further guesses until you find the position of the rotating switches SW1

which determines the resonance condition.

Then, after having reached it increase (or decrease) the potentiometer value P3 to obtain the

required vibration level.

During the research stage it is suitable that the potentiometer P3 remains at 20% of the

end of scale.

If, increasing the potentiometer P3 value, the green led DL1 switches off whereas the red one

DL2 switches on and the vibrator stops, it means that the device is in overload; decrease the

potentiometer value and the power supply will automatically reset the overload condition.