NI PXI-4071

Description

NI PXI-4071 Product Description

Detailed Parameter Table

NI PXI-4071

Product Introduction

The NI PXI-4071 is a high-precision 6½-digit digital multimeter module designed for PXI systems, delivering accurate and reliable measurements in automated test and measurement applications. As a flagship DMM in National Instruments’ PXI portfolio, it combines exceptional measurement accuracy with fast sampling rates, making it suitable for both high-precision lab measurements and high-throughput production testing.

This module integrates seamlessly with PXI chassis such as the PXI-1031, leveraging the PXI bus for synchronized operation with other modules like the PXI-2510 switch module. Its compact 3U form factor saves valuable rack space, while its broad range of measurement functions—including voltage, current, and resistance—eliminates the need for multiple instruments. Whether used in electronics manufacturing, aerospace testing, or research laboratories, the PXI-4071 ensures consistent and traceable measurements.

Core Advantages and Technical Highlights

High-Precision Measurements

With 6½-digit resolution (up to 22 bits) and industry-leading accuracy specifications, the PXI-4071 excels in applications requiring precise measurements. For example, its DC voltage accuracy of ±(0.0012% of reading + 0.0008% of range) ensures reliable results when testing precision voltage references or calibrating sensors. The 4-wire resistance measurement capability minimizes lead resistance errors, critical for characterizing low-resistance components like shunt resistors or bonding wires in semiconductors.

Fast Measurement Rates

The PXI-4071 balances precision with speed, offering up to 1000 readings per second at 4½ digits. This high throughput is essential for production test environments where hundreds or thousands of devices under test (DUTs) must be measured quickly. In a printed circuit board (PCB) test station, for instance, it can rapidly measure voltages across multiple test points, reducing test cycle time and increasing manufacturing efficiency.

Versatile Measurement Functions

Covering DC/AC voltage, DC/AC current, and 2-wire/4-wire resistance, the PXI-4071 eliminates the need for separate instruments. Its diode test and continuity check features further enhance its utility in troubleshooting and component verification. This versatility makes it a cornerstone of modular test systems, adapting to diverse measurement needs without reconfiguring hardware.

Seamless Integration with Switch Systems

When paired with the PXI-2510 switch module, the PXI-4071 enables automated multi-channel measurement systems. The PXI-2510 routes signals from multiple DUTs to the PXI-4071, allowing sequential measurements without manual intervention. This combination is ideal for testing arrays of components—such as resistors in a resistor network—where each component must be measured individually.

Typical Application Scenarios

Electronics Manufacturing Test

In semiconductor production, the PXI-4071 is used to test integrated circuits (ICs) for parametric compliance. For example, it measures the output voltage of voltage regulators, ensuring they fall within specified tolerances. When combined with the PXI-2510, it can sequentially test multiple pins of an IC, verifying leakage currents, input resistances, and output voltages in a single automated sequence.

Calibration Systems

Laboratories and metrology facilities rely on the PXI-4071 for calibrating lower-precision instruments. Its traceable measurements (calibrated to NIST standards) make it suitable for verifying the accuracy of bench multimeters, data loggers, and sensor interfaces. The module’s stability over time ensures consistent calibration results, critical for maintaining quality control in manufacturing or research.

Aerospace and Defense Testing

In aerospace applications, the PXI-4071 measures critical parameters in avionics systems, such as sensor outputs and power supply voltages. Its ability to handle high voltages (up to 1000 V) and currents (up to 3 A) makes it suitable for testing power distribution systems in aircraft. When synchronized with other PXI modules via triggers, it can correlate voltage fluctuations with system performance, aiding in fault diagnosis.

NI PXI-4071

Related Model Recommendations

NI PXI-1031: A 5-slot PXI chassis that houses the PXI-4071 and other modules, providing a compact and synchronized platform for test systems. Its high-speed backplane ensures low-latency communication between the DMM and controllers.

NI PXI-2510: A 4×32 matrix switch module that pairs with the PXI-4071 to create multi-channel measurement systems. The PXI-2510 routes signals from multiple DUTs to the DMM, enabling automated testing of arrays of components.

NI PXI-8106: A PXI controller with an Intel Core i7 processor, which processes measurement data from the PXI-4071 in real time. It runs test sequences developed in LabVIEW, logging results and generating pass/fail reports.

NI-DAQmx: Driver software that simplifies programming the PXI-4071. It provides ready-to-use functions for configuring measurements, triggering, and data logging, reducing development time for custom test applications.

NI Switch Executive: Software that manages the interaction between the PXI-4071 and PXI-2510, automating signal routing and ensuring measurement sequences are executed efficiently.

Installation, Commissioning, and Maintenance

Installation Steps

Module Insertion: Power off the PXI chassis (e.g., PXI-1031). Insert the PXI-4071 into an available peripheral slot, ensuring it is fully seated in the backplane. Secure the module with front-panel screws to prevent movement during operation.

Wiring Connection: Connect test leads or cables from the DUT to the PXI-4071’s front-panel terminals. Use shielded cables for low-level signals to minimize noise. For current measurements, ensure the DUT is connected in series with the module’s current input.

Software Setup: Install NI-DAQmx drivers and compatible software (e.g., LabVIEW) on the PXI controller. Launch NI Measurement & Automation Explorer (MAX) to verify the module is detected and configured correctly.

Commissioning

Self-Calibration: Run the module’s built-in self-calibration routine via MAX to ensure measurement accuracy. This compensates for environmental factors like temperature drift, critical for high-precision applications.

Functionality Test: Use a known reference (e.g., a calibrated voltage source) to verify key measurements. For example, apply a 10.0000 V DC reference and confirm the PXI-4071 reads within its specified accuracy range. Test multiple functions (resistance, current) to ensure full operation.

Integration with Switch Systems: If paired with the PXI-2510, use NI Switch Executive to map routes from DUTs to the PXI-4071. Run a test sequence to verify that signals are routed correctly and measurements are accurate across all channels.

Maintenance Tips

Periodic Calibration: Calibrate the PXI-4071 annually (or per application requirements) using NI’s calibration services to maintain traceability and accuracy. This is critical for compliance with ISO standards or regulatory requirements.

Input Protection: Avoid exceeding the module’s maximum input ratings (e.g., 1000 V, 3 A) to prevent damage. Use external fuses or current-limiting resistors when testing unknown signals.

Connector Care: Inspect front-panel terminals regularly for corrosion or damage. Clean with a dry cloth if necessary, and ensure test leads are in good condition to maintain low contact resistance.

Environmental Control: Operate the module within its specified temperature (0 °C to 55 °C) and humidity ranges. Avoid exposure to dust or corrosive gases, which can degrade performance over time.

Service and Guarantee Commitment

The NI PXI-4071 comes with a 2-year standard warranty covering defects in materials and workmanship. National Instruments’ global technical support team provides 24/7 assistance for installation, troubleshooting, and software integration via phone, email, and online resources.

NI offers accredited calibration services to ensure the module meets its published specifications, with calibration certificates traceable to NIST. Extended warranty and service plans are available for customers requiring long-term support. With a focus on reliability, the PXI-4071 is designed to deliver consistent performance in demanding test environments, backed by NI’s commitment to quality and customer success.