Description
Product Specifications
- Origin: United States / Mexico (National Instruments)
- Weight: 0.65 lbs (0.30 kg)
- Dimensions: Standard 3U PXI module; 1 slot wide
- DC Voltage: 10 nV to 1000 V
- AC Voltage: 10 nV to 700 V (True RMS)
- Resistance: 10 µΩ to 5 GΩ (2- and 4-wire)
- Digitizing Rate: Up to 1.8 MS/s (1.8 million samples per second)
- Current Range: 1 pA to 3 A (DC); 1 pA to 3 A (AC)
The NI PXI-4071 is a premier 7½-digit digital multimeter (DMM) that delivers the measurement capability typically found in high-end benchtop instruments within the compact PXI form factor. It utilizes a proprietary FlexADC architecture, allowing it to function as both a high-precision DMM and a high-voltage isolated digitizer. This versatility makes it ideal for automated test environments that require extremely low noise floors and high-speed data acquisition. With its wide dynamic range and integrated self-calibration (Self-Cal), the PXI-4071 ensures long-term accuracy and minimal traceability drift across varying temperatures in aerospace, semiconductor, and automotive testing applications.
NI PXI-4071
NI PXI-4071
NI PXI-4071
Model Comparison: PXI-4071 vs. Similar Models
The PXI-4071 is the high-performance flagship of the NI DMM family, offering a significant jump in precision over the PXI-4070 (6½-digit). While the 4070 is suitable for standard automated testing, the 4071 provides the 7½-digit resolution and extended voltage range (up to 1000V) required for metrology-grade applications. Compared to the PXIe-4081, which is the newer PXI Express version, the PXI-4071 operates on the standard PXI bus. While the 4081 offers higher data throughput and 8½-digit resolution, the PXI-4071 remains a cost-effective and highly reliable standard for 3U PXI legacy and hybrid systems where extreme precision is already a baseline requirement.
Operational Guidelines
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- Self-Calibration (Self-Cal): Perform a Self-Cal via the NI-DMM driver if the ambient temperature shifts by more than 5°C from the last calibration. This routine adjusts internal offsets and gain to maintain 7½-digit integrity without external equipment.
- Warm-up Time: For maximum accuracy (especially in the 7-digit mode), allow the PXI chassis and the module to warm up for at least 60 minutes to reach thermal equilibrium.
- Input Protection: Although rated for 1000V, ensure that the common-mode voltage between the “LO” input and the chassis ground does not exceed 450V DC/AC peak to avoid internal isolation breakdown.
- Cabling Selection: Use high-quality, shielded twisted-pair cables for low-resistance (4-wire) and low-current measurements to minimize the impact of thermal EMFs and environmental EMI on the measurement results.
