Highly accurate digital multimeters for challenging applications
Engineers can now make precise measurements with the PXI-4071 FlexDMM, a versatile device from NI (National Instruments) with a signal range from microamps to kilovolts, featuring a 7½-bit (26-bit) digital multimeter and 1 8 MS/s digitiser with isolation. bits) digital multimeter and 1.8 MS/s digitiser with isolation.The NI PXI-4071 FlexDMM enables you to accurately measure voltages from ±10 nV to ±1000 V and resistances from 10 µW to 5 GW. It also uses a solid-state circuit shunt configuration to provide eight DC measurement ranges from 1 µA to 3 A, and six AC measurement ranges from 100 µA to 3 A. This capability enables engineers to measure voltages from ±10 nV to ±1000 V and resistances from 10 µW to 5 GW. This gives engineers the flexibility, versatility, and isolation to adequately address challenging applications such as fuel cell testing, leakage measurements, value-added curve tracking, and converter linearity data testing.
The FlexDMM is the most accurate digital multimeter for the PXI platform, with a DC read rate of 7 S/s at 7½-bit accuracy, and for higher throughput requirements, the FlexDMM offers a DC read rate of up to 10 kS/s at 4½-bit accuracy, which is up to 5 times faster than conventional DMMs using the General Purpose Bus Interface (GPIB). When used in digitiser mode with isolation, the FlexDMM is capable of continuous waveform acquisition over all voltage and current ranges at a maximum sample rate of 1.8 MS/s. With built-in isolation, engineers can measure differential waveforms with 500 volts of common mode voltage (e.g., fuel cell stack testing). By varying the digitiser's sample rate, engineers can also change the digitiser's resolution over a range of 10 to 23 bits. Using the NI LabVIEW graphical programming environment, engineers can simultaneously analyse transients, inverted signals, and a variety of other non-periodic, high-voltage DC waveforms at different clocks and frequencies when using the FlexDMM in digitizer mode with isolation.
Engineers can quickly increase the number of channels in the FlexDMM by integrating the FlexDMM system with NI's switching modules, such as the NI PXI-2532 512-Cross High-Density Matrix. Engineers can combine FlexDMM with NI switch modules and NI Switch Executive switch management software to measure thousands of channels with a single multimeter.The NI PXI-4071 FlexDMM includes NI LabVIEW, LabWindows/CVI, and Microsoft Visual Studio . Studio .NET NI-DMM driver software.
