DIGISYSTEM APS20201 Руководство по эксплуатации - Страница 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.
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