National Instruments 778271-01

The National Instruments part number 778271-01, also known as the PXI-4071, is a high-performance 7½-digit digital multimeter housed in a 3U PXI module. This advanced device offers an extensive voltage measurement range of ±1,000 V and a versatile current range of ±1 pA to 3 A, providing precise measurements crucial for various applications. The PXI-4071 integrates the functionalities of a digitizer and a high-resolution digital multimeter into a single unit, enabling accurate frequency, voltage, current, and resistance measurements across a wide range. Specifically, it measures resistance from 10 μΩ to 5 GΩ and supports both two-wire and four-wire configurations for enhanced measurement accuracy.

With a maximum sampling rate of 1.8 MS/s, this module is suitable for capturing waveforms and analyzing transient dynamics. The isolated digitizer mode allows for the acquisition of DC-coupled waveforms while minimizing common-mode voltage interference, making it ideal for high-voltage AC waveform analysis. Users benefit from integration capabilities with National Instruments’ switch solutions, such as the NI SCXI-1129 and NI PXI-2530, which facilitate the measurement of numerous signal types, including voltages, thermocouples, RTDs, and thermistors.

The PXI-4071 features rapid auto-ranging capabilities, adjusting its range in as little as 5 ms for DC measurements, while offering a fast triggering rate of 6 kHz with a minimal trigger delay of 2 μs. Its input characteristics include a high common-mode rejection ratio (CMRR) exceeding 140 dB under DC conditions and an input impedance exceeding 10 GΩ or 10 MΩ depending on the voltage range. The module also provides various options for measurement optimization, including a maximum 4-wire lead resistance limitation of either 10% of the range or 1 kΩ, whichever is smaller. Overall, the National Instruments 778271-01 PXI Digital Multimeter is a robust solution for high-precision measurement applications in diverse industrial environments.