Rigol DM3058 Manual do Utilizador descarregar pdf (Página 29)

RIGOL

Quick Guide for DM3058/DM3058E

III

ENGLISH

2) LO-ground protection limitation. LO terminal can safely

“float” 500Vpk relative to the ground.

The maximum protection limitation of HI terminal relative to

the ground is 1000Vpk. Therefore, the sum of the “float”

voltage and the measured voltage cannot exceed 1000Vpk.

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 600VAC.

WARNING: 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.

DM3058/DM3058E may be used to make measurements with the HI

and LO inputs connected to mains in such devices (up to 600VAC),

or to the branch outlet itself. However, DM3058/DM3058E 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 disconnected boxes, or

permanently wired motors. Such devices and circuits are subject to

overvoltage that may exceed the protection limits of

DM3058/DM3058E.

NOTE

：Voltages above 600VAC may be measured only in circuits

that are isolated from mains. However, transient overvoltage is also

present on circuits that are isolated from mains. DM3058/DM3058E

is designed to safely withstand occasional transient overvoltage up

to 4000Vpk. Do not use this equipment to measure circuits where

transient overvoltage could exceed this level.

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