User`s guide

RIGOL Chapter 6 Specifications
6-2 M300 User’s Guide
Measuring Characteristics
DC Voltage
Input Impedance
200mV, 2V, 20V ranges: 10MΩ or >10GΩ
(For these ranges, input beyond ±26 V are clamped through 106 kΩ)
200V and 300V ranges: 10MΩ±1%
Input Protection
300V
Input Offset Current
50pA, at 25
℃
, typical
CMRR (common mode
rejection ratio)
140 dB for 1 kΩ unbalanced resistance in LO lead, ±300 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
300V 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
Auto Zero OFF Operation (typical value)
Following instrument warm-up at the environment temperature ±1
℃
and <5 minutes, add 0.0001 % range + 2 uV error for DCV and 2 mΩ error for
resistance.
Settling Considerations
Reading settling times are affected by source impedance, cable dielectric characteristics and input signal changes. The default measurement delay
can ensure the correctness of the first reading for most measurements.
Measurement Considerations
Teflon or other high-impedance, low-dielectric absorption wire insulation is recommended for these measurements.