Measuring Characteristics
DC Voltage
Measurement Method: Sigma Delta A-to-D converter.
Input Resistance:
400mV, 4V ranges Selectable 10MΩ ± 2% or >10GΩ
40V, 400V, 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 400Ω, 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
Measurement Method: 1mA ± 0.2% test current, Limit in <8V
Response Time: 25 samples / sec
Continuity Threshold: Adjustable from 1Ω to 2000Ω
Input Protection: 1000V
True RMS AC Voltage
Measurement Method: AC coupled true-RMS-measure 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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