RIGOL
Service Guide for DM3000 Series
Do Not Operate in Wet/Damp Conditions.
Do Not Operate in an Explosive atmosphere.
Keep Product Surfaces Clean and Dry.
The disturbance test of all the models meet the limit values of A in the
standard of EN 61326: 1997+A1+A2+A3, but can’t meet the limit values of
B.
WARNING
IEC Measurement Category II. The HI and LO input terminals may be connected to
mains in IEC Category II installations for line voltages up to 300 VAC. To avoid the
danger of electric shock, do not connect the inputs to mains for line voltages above
300 VAC.
Protection Limits: To avoid instrument damage and the risk of electric shock, do not
exceed any of the Protection Limits defined in the following section.
IEC Measurement Category II Overvoltage Protection
To protect against the danger of electric shock, the RIGOL DM3000 series Digital
Multimeter provides overvoltage protection for line-voltage mains connections
meeting both of the following conditions: the HI and LO input terminals are connected
to the mains under Measurement Category II conditions, defined below, and The
mains are limited to a maximum line voltage of 300 VAC. IEC Measurement Category
II includes electrical devices connected to mains at an outlet on a branch circuit.
Such devices include most small appliances, test equipment, and other devices that
plug into a branch outlet or socket. The DM3000 series Digital Multimeter may be used
to make measurements with the HI and LO inputs connected to mains in such devices,
or to the branch outlet itself (up to 300 VAC). However, the DM3000 series Digital
Multimeter may not be used with its HI and LO inputs connected to mains in
permanently installed electrical devices such as the main circuit-breaker panel,
sub-panel disconnect boxes, or permanently wired motors. Such devices and circuits
are subject to overvoltage that may exceed the protection limits of the DM3000 series
Digital Multimeter.
NOTE: Voltages above 300 VAC may be measured only in circuits that are isolated
from mains. However, transient overvoltage is also present on circuits that are
isolated from mains. The DM3000 series Digital Multimeter is designed to safely
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