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National Instruments PXI-4071 Digital Multimeter

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US$ 400 - 1600 MOQ: 1 Unit
Key Specifications
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Brand Name:
National Instruments
Place of Origin:
United States
Model Number:
PXI-4071
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Guizhou Yuanmiao Automation Equipment Co., Ltd.
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Brand Name National Instruments
Place of Origin United States
Model Number PXI-4071
Resolution 7.5 digits (26 bits)
Maximum DC voltage 1000V
DC sensitivity 10nV
Maximum AC rms (peak) 700Vrms (1000V)
Maximum DC current 3A
DC current sensitivity 1pA
Maximum AC rms current (peak) 3A (4.2A)
AC rms current sensitivity 100pA
Maximum resistance 5GΩ
Resistance sensitivity 10μΩ
The NI PXI - 4071 is a 7.5 - digit FlexDMM, a high - performance, multi - functional 3U PXI module that offers the measurement capabilities of two commonly used test instruments: a high - resolution digital multimeter and a digitizer. 


Features

  • High - precision measurement: It can quickly and accurately measure voltage in the range of ±10nV to 1000V, current in the range of ±1pA to 3A, resistance from 10μΩ to 5GΩ, as well as frequency/period and diode measurements.

  • High - speed digitization: In the high - voltage isolated digitizer mode, it can acquire DC waveforms in all voltage and current modes at a sampling rate of 1.8MS/s. The acquired waveforms can be analyzed in the time and frequency domains.

  • Wide measurement range: It covers a signal range from picoamperes to kilovolts, with 8 DC measurement ranges and 6 AC measurement ranges. Using a solid - state circuit shunt configuration, it has a wide current measurement range and can measure voltages from very small values to high voltages.

  • High common - mode isolation: It has ±500V DC/Vrms common - mode isolation, which can be used to measure signals with high common - mode voltages, such as differential waveforms in fuel cell stack testing.

  • Flexible integration: It can be used in conjunction with PXI switches to form a multi - channel high - voltage data acquisition system. For example, it can be used with the 12 - channel, 600V multiplexer of PXI - 2584 to test fuel cells or battery packs, or with the 64 - channel, 300V multiplexer of PXI - 2527 to achieve low - voltage, high - precision measurements.

PXI-4071 (2)

Working PrinciplesVoltage measurement principle

When measuring voltage, the input voltage signal is first processed by an input attenuator or amplifier to adjust it to an appropriate level range for accurate measurement by subsequent circuits. The module can measure voltages from ±10nV to 1000V. The internal A/D converter (analog - to - digital converter) samples and quantizes the adjusted voltage signal, converting the analog voltage signal into a digital signal. The A/D converter has a high resolution, enabling 7.5 - digit (26 - bit) measurement accuracy. The digital signal processor (DSP) processes and calculates the converted digital signal, computes the actual voltage value based on the measurement range and algorithm, and outputs the result for display or transmission to other devices.

Current measurement principle

For current measurement, the PXI - 4071 uses a solid - state circuit shunt configuration. The input current signal passes through a shunt resistor, converting the current into a corresponding voltage signal. This converted voltage signal then goes through a processing flow similar to voltage measurement, including adjustment by an input attenuator/amplifier, A/D conversion, and DSP processing, ultimately yielding the measured current value. Its current measurement range is from ±1pA to 3A.

PXI-4071 (3)

Resistance measurement principle

When measuring resistance, the module applies a known current source to the resistor under test. According to Ohm's law (voltage = current × resistance), the resistance value can be calculated by measuring the voltage drop across the resistor under test. The applied current source and the measured voltage signal also go through steps such as input processing, A/D conversion, and DSP calculation to obtain the resistance measurement result, with a measurement range from 10μΩ to 5GΩ.

Frequency/period measurement principle

When measuring frequency or period, the input signal first passes through a signal conditioning circuit, which amplifies and shapes the signal to meet the measurement requirements. Then, a counter counts the period of the signal or the number of pulses within a certain time. The DSP calculates the frequency or period value of the signal based on the counting result and the time reference.

Diode measurement principle

When measuring a diode, the module applies an appropriate test voltage to the diode to make it conduct. By measuring the current and voltage at this time, the quality of the diode can be judged using the volt - ampere characteristics of the diode, and relevant parameters such as the forward voltage drop of the diode can be calculated.

Digitizer mode principle

In the high - voltage isolated digitizer mode, the PXI - 4071 can perform high - speed sampling of the input voltage or current signal at a sampling rate of 1.8MS/s (1.8 million samples per second). These sampled data are stored in the internal memory and can then be analyzed in the time and frequency domains through software, such as observing the waveform and spectrum characteristics of the signal.

PXI-4071 (4)

Application Cases

  • Fuel cell testing: In combination with switch modules such as PXI - 2584, it can test fuel cells or battery packs under 500V DC/Vrms common - mode isolation conditions, accurately measuring parameters such as voltage and current to help researchers evaluate the performance and efficiency of fuel cells.

  • R & D and production testing of electronic devices: During the R & D and production of electronic devices, it is used to measure the voltage, current, and resistance of various circuit modules with high precision to ensure that the product quality and performance meet the requirements. For example, it can measure the power supply voltage of chips, the current consumption in circuits, and the resistance value of resistive elements, helping engineers identify design flaws and production problems.

  • Motor control system testing: It can be used for electrical appliances with motor control systems, such as air conditioners, washing machines, refrigerators, general - purpose inverters, industrial motor equipment, robots, and machine tools. It measures and analyzes the operating parameters of motors, such as winding resistance, operating current, and drive voltage, to optimize the performance of the motor control system and improve the efficiency and reliability of the motor.

PXI-4071 (1)

Main Products：

Covering world-renowned brands:

Bently Nevada、Triconex、Woodward、Foxboro、Westinghouse、Reliance、Schneider Modicon、ABB、Allen-Bradley、Motorola、GE Fanuc、Yaskawa、ACSO、YOKOGAWA、Rexroth、NI、Bosch Rexroth、ICS Triplex、Kollmorgen、Mitsubishi、MOOG、Emerson、B&R、SST、ALSTOM、EPRO、HIMA、HONEYWELL、prosoft、AMAT 、SIEMENS、KUKA、LAM Product categories include: DCS system parts, robot system spare parts, large-scale servo system components, widely applied in power, chemical, metallurgy, smart manufacturing, and other industries.


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Guizhou Yuanmiao Automation Equipment Co., Ltd.
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Business Type
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Year Established
2022
Main Markets
North America, South America, Eastern Europe, Central America
Location
Anshun, Guizhou, China
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