Thermo Fisher Scientific Alpha CON 100 - Manual (Page 26)

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Appendix 1
Jumper Positions - Internal to the Controller
JP1 Selects the input voltage between 110 VAC or
220 VAC.
Fuse Note that there is a fuse internal to the
Controller. Before opening the unit, ENSURE
that the power cable is physically separated
from the mains supply. Replace the fuse with
the one recommended by the manufacturer.
Front
Back
JP 1
Fuse
1 2
LED
Display
220VAC
110VAC