Rigol DM3064 Guia do Utilizador descarregar pdf (Página 141)

RIGOL

User’s Guide for DM3000 Series

5-7

Measuring Characteristics

DC Voltage

Measurement Method: Sigma Delta A-to-D converter.

Input Resistance:

200mV, 2V, 20V ranges Selectable 10MΩ ± 2% or >10GΩ

200V, 1000V ranges 10MΩ ± 2%

Resistance

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

Current source referenced to LO input.

Open-circuit Voltage: Limit in <7V.

Max. Lead Resistance: 10% of range per lead for 200Ω, 1kΩ range. 1kΩ per lead

(4-wire ohms) on all other ranges.

Input Protection: 1000V on all ranges.

DC Current

Shunt Resistor: 0.025Ω for 1A, 10A

1.025Ω for 200mA

11.025Ω for 2mA, 20mA

Input Protection: Externally accessible 10A, 250V fuse

Internal 12A, 250V fuse

Continuity / Diode Test

Response Time: 25 samples / sec

Measurement Method: 1mA ±0.2% test current, Limit in <7V

Continuity Threshold: Adjustable from 1Ω to 2000Ω

Input Protection: 1000V

True RMS AC Voltage

Measurement Method: AC-coupled True RMS – measures the ac component of input with up to

400Vdc of bias on any range.

Input Impedance: 1MΩ ± 2%, in parallel with <100pF

Input Protection: 750VRMS all ranges

True RMS AC Current

Measurement Method: Direct coupled to the fuse and shunt. AC-coupled True RMS measurement

(measures the ac component only)

Max. Input: The DC + AC current peak value <300% of the range. The RMS current

including DC current <10A.

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Rigol DM3064 Guia do Utilizador Página 141