User’s Manual MSO/UPO2000 Seri es
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Instruments.uni-trend.com
Caution
It indicates possible danger, which may cause damage to this device or other
equipment if you fail to follow a certain procedure or condition. If the
“Caution” sign is present, all conditions must be met before you proceed to
operation.
Note
It indicates potential problems, which may cause failure of this device if you
fail to follow a certain procedure or condition. If the “Note” sign is present, all
conditions must be met before this device will function properly.
AC
Alternating current of device. Please check the region’s voltage range.
DC
Direct current device. Please check the region’s voltage range.
Grounding
Frame and chassis grounding terminal.
Grounding
Protective grounding terminal.
Grounding
Measuring grounding terminal.
OFF
Main power off.
ON
Main power on.
Power
Supply
Standby power supply: when the power switch is turned off, this device is not
completely disconnected from the AC power supply.
CAT I
Secondary electrical circuit connected to wall sockets through transformers
or similar equipment, such as electronic instruments and electronic
equipment; electronic equipment with protective measures, and any high-
voltage and low-voltage circuits, such as the copier in the office
CAT II
CATII: Primary electrical circuit of the electrical equipment connected to the
indoor socket via the power cord, such as mobile tools, home appliances,
etc. Household appliances, portable tools (e.g. electric drill), household
sockets, sockets more than 10 meters away from CAT III circuit or sockets
more than 20 meters away from CAT IV circuit
CAT III
Primary circuit of large equipment directly connected to the distribution
board and circuit between the distribution board and the socket (three-phase
distributor circuit includes a single commercial lighting circuit). Fixed
equipment, such as multi-phase motor and multi-phase fuse box; lighting
equipment and lines inside large buildings; machine tools and power
distribution boards at industrial sites (workshops)
CAT IV
Three-phase public power unit and outdoor power supply line equipment.
Equipment designed to “initial connection”, such as power distribution
system of power station, power instrument, front-end overload protection,
and any outdoor transmission line
Certification CE indicates a registered trademark of EU.
