RIGOL DM3058 - Manual (Page 5)

RIGOL
User’s Guide for DM3058/DM3058E III
Keep Product Surfaces Clean and Dry.
The disturbance test of all the models meet the P/F values of A in the
standard of EN 61326: 1997+A1+A2+A3, but can’t meet the P/F values
of B.
Input Terminal Protection Limitation
Protection limitation is defined for the input terminal:
1． Main input (HI and LO) terminal
HI and LO terminals are used for Voltage, Resistance, Capacitance, Continuity,
Frequency and Diodes measurement. Two protection limitations are defined:
1) HI-LO protection limitation: 1000 VDC or 750 VAC. It is the maximum
measurable voltage. The limitation can be expressed as 1000 Vpk.
2) LO-ground protection limitation. LO terminal can safely “float” 500 Vpk
relative to the ground.
The maximum protection limitation of HI terminal relative to the ground is
1000 Vpk. Therefore, the sum of the “float” voltage and the measured voltage
cannot exceed 1000 Vpk.
2． Sampling (HI Sense and LO Sense) terminal
HI Sense and LO Sense are used for 4-Wire Resistance Measurement. Two
protection limitations are defined:
1) HI Sense-LO Sense protection limitation: 200Vpk.
2) LO Sense-LO protection limitation: 2Vpk.
3． Current input (I) terminal
I and LO terminal are used for current measurement. The maximum current
which go through the I terminal is limited to 10A by the fuse on the rear
panel.
NOTE: Voltage on the current input terminal corresponds to voltage on LO
terminal. To obtain favorable protection, specified fuse should be used.
IEC Measurement Category II Overvoltage Protection
To protect against the danger of electric shock, DM3058/DM3058E 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 600 VAC.