RIGOL DM3068 - Manual (Page 150)

RIGOL Chapter 6 Specifications
User’s Guide for DM3068 6-4
Measuring Characteristics
DC Voltage
Input Impedance
200 mV, 2 V, 20 V ranges: 10 MΩ or >10 GΩ
(For these ranges, input beyond ±26 V are clamped through 106 kΩ)
200 V and 1000 V ranges: 10 MΩ±1%
Input Protection 1000 V
Input Offset Current 50 pA, at 25℃, typical
CMRR (common mode
rejection ratio) 140 dB for 1 kΩ unbalanced resistance in LO lead, ±500 VDC peak maximum.
Resistance
Measurement Method
4-wire or 2-wire resistance
Current source referenced to LO input
Open-circuit Voltage Limited to <10 V
Max. Lead Resistance
(4-wire) 10% of range per lead for 200 Ω and 2 kΩ ranges, 1 kΩ per lead on all other ranges
Input Protection 1000 V on all ranges
Offset Compensation Available on 200 Ω, 2 kΩ and 20 kΩ ranges.
DC Current
Shunt Resistor
100 Ω for 200 uA, 2 mA
1 Ω for 20 mA , 200 mA
0.01 Ω for 2 A, 10 A
Input Protection Externally accessible 500 mA, 250 V high speed fuse at the rear panel for 200 uA, 2 mA, 20 mA and 200 mA ranges.
Internal 10 A, 250 V high speed fuse for 2 A and 10 A ranges.