R.V.R. Elettronica PJRL250, Техническое руководство

Страница: 32 / 69

PJRL250 Technical and Maintenance Manual
R.V.R. Elettronica S.r.l. (Bo) Pag. 32
NOTE: This setting may vary with the working frequency,
it’s preferable to make this adjustment at the operating
frequency.
5.4 SOFT-START ADJUSTMENT
No adjustments are needed after this board has been changed.
NOTE: Pay attention to the correct insertion of the
connectors.
5.5 ALARMS CARD ADJUSTMENT
NOTE: Make sure that this replacement is really necessary.
1) After changing the board, connect the amplifier as shown in the
SETUP5 (Fig.8) schematic.
2) Switch on PJRL250.
3) Place the Meter Selector (8 Fig.1) on "V".
4) Adjust trimpot R14 to obtain a f.s.d. reading of 50V (check that
the output voltage of the power supply is really 50V).
To check this, refer to step 4 of power supply adjustment.
5) Place the Meter Selector (8 Fig.1) on "I".
6) Insert a 50Ohm P>300W power resistor at the output of the power
supply and follow step 5 of the power supply adjustment procedure.
7) Switch on the exciter and wait for PLL lock.
8) Increase the output power to a level of 250W.
9) Adjust the FWD reading with trimpot R11.
SETUP 5 / FIG. 8