RIGOL DM3058 - Manual (Page 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.