The NI PXI-4071 is a 7.5-digit digital multimeter module engineered for high-performance measurement within PXI systems. It combines precision DMM functionality with a 1.8 MS/s isolated digitizer, delivering exceptional resolution and speed for automated test environments. The module measures DC and AC voltage, current, resistance, frequency, and period with configurable resolution ranging from 7.5 digits down to 3 digits, enabling trade-offs between accuracy and acquisition speed.
Technical Specifications
Digital Multimeter Performance
• DC voltage: ±10 nV to 1000 V range; 7.5-digit resolution (26 bits) with Auto Zero and ADC calibration enabled
• AC voltage: Up to 700 Vrms (1000 V peak); 6.5-digit resolution
• DC current: ±1 pA to 3 A; 1 pA sensitivity; 6.5-digit resolution
• AC current: Up to 3 A (4.2 A peak); 100 pA sensitivity
• Resistance: 10 µΩ to 5 GΩ; supports 2-wire and 4-wire measurement
• Frequency and period: 2-second gate time, signal >10% of AC voltage range
• Diode test: Supported
• Reading rates: 7 S/s (7.5 digits), 10 kS/s (4.5 digits), 1.8 MS/s (3 digits/digitizer mode)
Digitizer Capabilities
• Sampling rate: Up to 1.8 MS/s
• Waveform acquisition: DC-coupled in all voltage and current modes
• Isolation: ±500 VDC/Vrms common-mode
System Integration
• Trigger latency: 2 µs
• Maximum trigger rate: 1 kHz
• Function or range change: 100/s
• Auto range time (DC V): 5 ms
• PXI bus native control for high-speed performance
– Key Features
• High-resolution measurement with 7.5-digit accuracy in DC modes
• Isolated digitizer mode for differential waveform acquisition under high common-mode voltage
• Flexible resolution selection optimizes measurement speed versus accuracy
• Auto Zero and ADC calibration enhance DC measurement precision
• Fast trigger integration with synchronization across PXI modules
– Typical Applications
Automated test systems, component characterization, high-precision sensor measurement, waveform acquisition under isolation, multi-channel synchronized measurement in modular test racks.
– Compatibility & Integration
Designed as a PXI module with native high-speed bus operation. Supports trigger import/export for module synchronization.
