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National Instruments USB-4065 Digital Multimeter Device

The National Instruments USB-4065 (Part Numbers: 780152-01, 196824G-01L) is a versatile and cost-effective measurement device designed for various applications in OEMs, educational laboratories, and other cost-conscious test and measurement environments. It offers a range of functionalities including AC/DC voltage, AC/DC current, 2- or 4-wire resistance measurements, and diode tests..

With formats for PXI, PCI, PCI Express, and USB, this affordable 6-1/2-digit digital multimeter offers versatility in system integration. It meets basic measuring demands while maintaining precision and safety with current measurements up to 3 A and isolation of ±300 VDC/Vrms. Standard APIs for NI LabVIEW, LabWindows/CVI, and Microsoft programming languages make it simple to program the USB-4065. The interface of the NI-DMM Soft Front Panel is easy to use for basic benchtop measurements. Furthermore, LabVIEW's DMM/Switch Express VI makes it easier to quickly create high-channel-count data-logging systems.

At 10 readings/s, this device can achieve resolution of 6 1⁄ 2 digits; at lower resolutions, it can achieve up to 3000 readings/s. By trading off speed for resolution, users can maximize throughput and measurement quality. Like other GPIB, LAN, or USB-based instruments, the USB-4065's accuracy holds true throughout a 24-hour cycle or a year with external calibration. With range or function changes at 10/s and trigger latency of less than 1 μs, the USB-4065 exhibits quick system speed characteristics. It ensures effective data capture with a maximum trigger rate of 2.5 kHz.

The device has auto range timings for resistance, voltage, and current measurements for DC functions. It also has an efficient common-mode rejection ratio (CMRR) and overrange protection. The same goes for AC functions, which also include overrange protection, coupling, input impedance, and CMRR parameters. The operating temperatures and relative humidity ranges for the USB-4065 are 0 °C to 45 °C and 10% to 90%, respectively. It can be stored in a temperature range of -40 °C to 70 °C with a relative humidity of 5% to 95%, which guarantees durability.