Rigol DM3068 Manual de usuario descargar pdf (Pagina 39)

RIGOL

DM3068 Quick Guide

Input Terminal Protection Limit

The protection limit applies to input terminals:

1． Main input (HI and LO) terminals

HI and LO terminals are used for Voltage, Resistance, Capacitance, Continuity,

Frequency and Diodes measurements and should be used under the following

two conditions:

1) HI-LO protection limit: at most 1000 VDC or 750 VAC, this is also the

maximum measurable voltage. The limit can be expressed as 1000 Vpk.

2) LO-ground protection limit: at most 500 Vpk (relative) is allowed to float at

LO terminal with safety.

Since the HI terminal holds a maximum protection of 1000 Vpk relative to the

ground, the sum of the “float” and measured voltages cannot exceed 1000 Vpk.

2． Sampling (HI Sense and LO Sense/200 mA) terminals

HI Sense and LO Sense/200 mA terminals are used for 4-Wire Resistance

measurement and should be used under the following two conditions:

1) HI Sense-LO Sense/200 mA protection limit: 200 Vpk.

2) LO Sense/200 mA-LO protection limits: 0.5 Vpk. The current input fuse

on the rear panel provides the current passing through LO Sense/200

mA up to 500 mA protection.

3． Current input (10 A and Sense/200 mA) terminals

10 A and LO terminals are used for current measurements of 2 A and 10 A. The

maximum current which goes through the 10 A terminal is limited to 10 A by

the internal fuse. LO Sense/200 mA and LO terminals are used for current

measurements ranging from 200 µA to 200 mA. The maximum current which go

through the LO Sense/200 mA terminal is limited to 500 mA by the internal

fuse.

NOTE:

In order to prevent the fuse from blowing out and protect the

multimeter, please use the current input terminals according to the

following requirements:

1) Do not connect the 10 A and LO Sense/200 mA input terminals into the

current measuring circuit at the same time.

2) Only use 10 A and LO terminals for measurements when the measured

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Rigol DM3068 Manual de usuario Pagina 39