Measurement Computing Digital488/80A - Manual (Page 26)

Power Line & Fuse Configuration
The power configuration of the Digital488/80A unit consists of selecting the line voltage and replacing the
fuses. Each Digital488/80A unit has a factory default to operate at 105-125 volts AC. However, each unit
may be operated at either 105-125 or 210-250 VAC.
WARNING
Do not use the Digital488/80A unit outdoors! The unit is intended for indoor use only!
Outdoor conditions could result in equipment failure, bodily injury or death!
WARNING
Never disassemble the Digital488/80A case while it is connected to the AC power line!
Internal voltage potentials exist which could cause bodily injury or death!
To change the operating voltage of the Digital488/80A unit, it is necessary to open the enclosure.
However, before modifying the voltage, disconnect any input or output connections from the rear panel of
, the fuse must also be changed. Refer to the following
voltage switch and fuse locations.
Line Voltage Selection
the affected unit and then disconnect the power cord from the power line terminal.
Line voltage must be set for 105-125 or 210-250 VAC to match the power being supplied to the
Digital488/80A unit. If the line voltage is changed
text for the line
CAUTION
d to the AC line. Contact with voltage potentials could cause bodily injury
or death!
Service: Fuse replacement and the changing of selected line voltage must be
performed by qualified service personnel. Never open the Digital488/80A case while it
is connecte
As already mentioned, the Digital488/80A may be operated with 105-125 or 210-250 VAC, 50-60 Hz
power, as set by its internal line-voltage switch (labeled S4). Each unit is shipped from the factory with
this operating voltage setting marked on its rear panel. If this is not the appropriate power setting to be
supplied to the unit, then the line voltage and power fuse must be changed to avoid damage to the unit.
The line-voltage selection procedure is outlined in the following steps.
20 Digital488/80A Power & Assembly Digital488/80A User's Manual