INFICON Cygnus Thin Film Deposition Controller - Manual (Page 151)

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Cygnus Operating Manual
If the nominal line voltage is 230 V(ac), use the 240 V(ac) nominal setting whose
input range includes 230 V(ac) ±10%.
WARNING
Verify that the correct fuse is in place by first unplugging
the unit, then pull the fuse extractor and visually inspect
the fuse for the proper rating. Use of an improper fuse
may create a safety hazard.
For 100 or 120 V(ac) operation, use a 4 amp Type T fuse.
For 230 or 240 V(ac) operation, use a 2 amp Type T fuse.
Also, visually verify that the voltage selector drum has
been oriented to the proper position.
6.3.2 Voltage Selection
If necessary, the power supply voltage range can be checked or changed on site
by a knowledgeable technician using extreme caution.
CAUTION
Damage to the unit and/or its interfaces will result by
operating the unit in the incorrect voltage range.
WARNING - Risk Of Electric Shock
This instrument has line voltage present on the primary
circuits whenever it is plugged into a main power source.
If the voltage selector drum needs to be changed to match your nominal line
voltage, it is required that the power cord be removed. Pry open the hinged door
that covers the voltage select drum and fuse. Pull out the drum. Reorient the
selector to the desired nominal line voltage. Reinsert the drum.
Pull out the fuse holder and check the fuse type and rating. The fuse must be a
4 amp Type T for either the 100 V(ac) or 120 V(ac) settings, or a 2 amp Type T for
either the 230 V(ac) or 240 V(ac) settings. Install the proper fuse, push the holder
firmly into place, and close the hinged door over the fuse and selector drum. The
selected nominal voltage will show through the window. See
Figure 6-4