Rigol DM3058 Manual do Utilizador descarregar pdf (Página 127)

RIGOL

User’s Guide for DM3058/DM3058E

6-3

DC Voltage

Input Resistance: 200mV and 2V range 10MΩ or >10GΩ selectable

(Input signals which exceed ±2.5V in these ranges will pass the 100kΩ

(typical) clamp resistance.

20V, 200V and 1000V range 10MΩ±2%

Input offset current: <90pA, 25℃

Input Protection: 1000V on all ranges

CMRR (common mode rejection ratio): 120dB (For the 1kΩ unbalanced resistance in LO lead,

maximum ±500VDC).

NMRR (normal mode rejection ratio): 60dB at “slow” measurement rate

Add 20dB when open the “AC filter” (Settling time adds

0.35s (source impedance near zero))

Resistance

Measurement Method: Selectable 4-wire or 2-wire.

Current source referenced to LO input.

Open-circuit Voltage: Limit in <8V.

Max. Lead Resistance: 10% of range per lead for 200Ω, 1kΩ per lead (4-wire ohms) on all

other ranges.

Input Protection: 1000V on all ranges.

DC Current

Shunt Resistor: 200μA sampling voltage<8mV

2mA sampling voltage<80mV

1Ω for 20mA, 200mA

0.01Ω for 2A, 10A

Input Protection: Externally accessible 10A, 250V fast-melt fuse

Internal 12A, 250V slow-melt fuse

Continuity / Diode Test

Measurement Method: 1mA ±5%

current source, <8V open-circuit voltage

Response Time: 123 samples / sec, with beeper

Continuity Threshold: Adjustable from 1Ω to 2000Ω

Input Protection: 1000V

Setting time attentions:

Settling time in voltage measurement is affected by the source impedance, media characteristics

of the cable and input signals.

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Rigol DM3058 Manual do Utilizador Página 127