EG&G ORTEC 402A Manuale operativo e di servizio - Pagina 8

Sfoglia online o scarica il pdf Manuale operativo e di servizio per Alimentazione EG&G ORTEC 402A. EG&G ORTEC 402A 16.

MODIFICATION

The transformer in this EG&G ORTEC 402A Power

Supply has a tap in each of the primary windings to per

mit operation with a nominal 100/200 V ac input. The tap

for one primary is a yellow wire and for the other primary

is a white wire. These leads are covered with shrinkable

tubing over the ends and are included in the bundle of

leads from the transformer.

To operate the 402A Power Supply from either a 100 or

200 V ac power source, use the following steps to change

the primary winding connections;

1. Remove the top cover from the 402A Power Supply.

2. Remove the two piug-in regulator boards.

3. Locate the unused yellow and white wires and

remove the shrinkable tubing from the wire ends.

Disconnect the black wire from the 117/230 V ac

switch and connect the yellow wire to the switch terminal

in place of the black wire.

Disconnect the black/white and red wires from the

117/230 V ac switch and connect the white wire to this

switch terminal.

6. Use shrinkable tubing or electrical insulation tape to

cover the bare end of the black wire.

7. Connect the black/white and red wires together and

wrap the ends with electrical insulating tape.

8. Return the two plug-in regulator boards and the top

cover to the 402A Power Supply.

The 402A is now wired for 100/200 V ac line operation

instead of 117/230 V ac. Ensure that the switch selects

the proper range before applying power to the unit.