The National Instruments 783130-01 PXI Digital Multimeter, corresponding to the PXIe-4081 model, is a highly accurate 7½-digit digital multimeter designed to deliver a comprehensive measurement solution. It integrates an isolated digitizer with the functionalities of a high-resolution 1,000 V DMM, ensuring precise measurements across various applications. This multimeter performs 2- or 4-wire resistance measurements, as well as frequency and period measurements, diode testing, and AC/DC voltage and current measurements. Operating in isolated digitizer mode, it can record waveforms at a remarkable rate of up to 1.8 MS/s.

With an impressive ADC linearity of 0.5 ppm of reading and range, the 783130-01 excels in delivering accurate DC voltage measurements. The device features a high-order DC noise rejection capability exceeding 170 dB and an effective common-mode rejection ratio (CMRR) of over 140 dB (DC) at a 100 ms aperture. It maintains a minimal DC voltage input bias current of less than 30 pA at 23°C and allows for minor overrange conditions of up to 105% of the specified range, except for at 1,000 V. The DMM supports both AC and DC coupling, boasting an AC voltage input impedance of 10 MΩ ± 2% in parallel with a typical 90 pF. With a maximum Volt-Hertz product of 2.2 x 10^7 V-Hz and a maximum DC voltage component of 400 V, it effectively manages overrange conditions for AC voltage, up to 105% of the range excluding 700 V.

The multimeter also features a diode test function with a range of 10 V, offering test currents of 1 µA, 10 µA, 100 µA, and 1 mA. The voltage and current measurement ranges of the isolated digitizer extend from ±100 mV to ±1000 V for voltage and from 100 µA to 3 A for current. Sample rates for the digitizer range from 10 S/s to 1.8 MS/s, with availability determined by specific divisor values. The digitizer's record length may vary from a minimum of two samples to extended lengths, while the accuracy of the timebase is correlated with the PXIe_CLK100 accuracy of the chassis.

Designed for reliability, the 783130-01 requires a calibration interval of two years and encapsulates National Instruments' commitment to high-quality measurement solutions.