multicomp pro MP720644 Quick Manual page 5

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 probes, test leads and other accessories 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.
Multicomp-Pro
Oscilloscope
Probe
Oscilloscope
(Battery-power)
USB/LAN Cable
3
AC Adapter
Electrical Outlet
PC Electrical Outlet