Owon TAO3000 Series User Manual page 9

short circuits, the 2 probe grounds must not be connected to 2 different
non-isolated DC levels.
The diagram of the oscilloscope ground wire connection:
Signal Input
Ground Clip
The diagram of the ground wire connection when the battery-powered
oscilloscope is connected to the AC-powered PC through the ports:
Probe
Signal Input
Ground Clip
It is not allowed to measure AC power when the oscilloscope is AC powered,
or when the battery-powered oscilloscope is connected to the AC-powered
PC through the ports.
Warning:
To avoid fire or electrical shock, when the oscilloscope input
signal connected is more than 42V peak (30Vrms) or on circuits of
more than 4800VA, please take note of below items:
 Only use accessory insulated voltage probes and test lead.
 Check the accessories such as probe before use and
replace it if there are any damages.
 Remove
immediately after use.
 Remove USB cable which connects oscilloscope and
computer.
 Do not apply input voltages above the rating of the
instrument because the probe tip voltage will directly
transmit to the oscilloscope. Use with caution when the
probe is set as 1:1.
 Do not use exposed metal BNC or banana plug connectors.
 Do not insert metal objects into connectors.
2.Safety Terms and Symbols
Oscilloscope
Probe
Oscilloscope
(Battery-power)
USB/LAN Cable
probes, test leads and other
3
AC Adapter Electrical Outlet
PC Electrical Outlet
accessories