RIGOL DM3068 - Manual (Page 40)

RIGOL
DM3068 Quick Guide VI
current AC+DC RMS value goes within 200 mA and 10 A.
3) Select a proper current input terminal according to the estimated current
magnitude before connect the multimeter to AC supplies if you want to use
current measurement.
4) The current into 10 A cannot exceed 13.5 A, otherwise it will blow out the
internal fuse; while the current into the LO Sense/200 mA terminal
cannot exceed 650 mA, otherwise the current fuse from the rear panel may
be blown out.
IEC II Overvoltage Protection
In order to prevent electric shock, DM3068 provides overvoltage protection for
line-voltage mains connections meeting both of the following conditions:
1． The HI and LO input terminals are connected to the mains under Measurement
Category II conditions, defined below.
2． The mains are limited to a maximum line voltage of 300 VAC.
WARNING: IEC II includes electrical devices connected to mains at an outlet on a
branch circuit. Such devices include most small appliances, test equipments and
other devices that inserted into a branch socket.
DM3068 may be used to make measurements with the HI and LO inputs connected
to mains in such devices (up to 300 VAC), or to the branch socket itself. However,
DM3068 may be used with its HI and LO inputs connected to mains from neither
permanently installed electrical device such as a main circuit-breaker panel,
sub-panel disconnected box nor wired motors. Such devices and circuits are readily
to beyond the protection from DM3068.
NOTE: Voltages above 300 VAC may be measured only in circuits that are isolated
from mains. However, a transient overvoltage is also present in such circuits.
DM3068 was designed to safely withstand occasional transient overvoltage up to
2500 Vpk. Do not use this device to measure circuits whose transient overvoltage
may exceed this level.