Adjustment and dialogue device more particularly for speed variators

Claim 1

In an electronic power control apparatus having a case including a removable front cover housed in said case, a controlled power supply having a plurality of adjustable operating parameters, adjusting and dialogue means comprising: (i) a printed circuit board mounted within said casing substantially parallel to said front cover, said circuit board having first and second surface portions and said cover having a portion facing said first surface portion and provided with an aperture ; (ii) a plurality of potentiometers for adjusting the respective operating parameters ; (iii) alphanumeric display means for displaying the adjusted values of the respective parameters ; (iv) switch means comprising an advance knob allowing the operator to sequentially scrutinize the respective parameters, said advance knob being accessible through said aperture, and (v) a processor having inputs connected to said switching means and to the potentiometers through A-D converter means and outputs connected to the display means, said processor including processing means for scrutinizing said inputs and for displaying, in response to the actuation of the advance knob, a code representative of the scrutinized parameter and the value of said parameter ; (vi) said parameters, display means and switch means being arranged on said first surface portion of the printed circuit board, whereas said processor and A-D convertor are arranged on the second surface portion and (vii) the portion of the cover which faces the display means is transparent.