NI PXI-4070 6.5 Digit Multimeter

The NI PXI-4070 is a 6.5-digit digital multimeter module for PXI systems that combines high-resolution measurement capabilities with a fully isolated, high-voltage digitizer. Designed for automated test and measurement applications, it delivers precise DC/AC voltage, current, resistance, and frequency measurements across production and R&D environments. The instrument supports both standard PXI and PXI Express hybrid slots.

– Technical Specifications

Measurement Functions & Resolution

• Resolution: 6.5 digits
• DC Voltage ranges: 100 mV, 1 V, 10 V, 100 V, 300 V
• AC Voltage ranges: 50 mV, 500 mV, 5 V, 50 V, 300 V
• DC Current ranges: 20 mA, 200 mA, 1 A
• AC Current ranges: 10 mA, 100 mA, 1 A
• Resistance ranges: 100 Ω, 1 kΩ, 10 kΩ, 100 MΩ
• Functions: 2-Wire and 4-Wire Resistance, Frequency/Period, Diode Test
• Basic DC Voltage Accuracy: 25 ppm (6½-digit resolution, ≥1 PLC, Auto Zero, ADC calibration enabled)
• DC Voltage Accuracy: ±6 ppm VDC
• Input Impedance (DC): 10 MΩ (100 mV–10 V), >10 GΩ (100 V, 300 V)
• Input Impedance (AC): 1 MΩ || <100 pF

Digitizer Capabilities

• Maximum Sampling Rate: 1.8 MS/s
• Resolution: 10 to 23 bits (adjustable by sampling rate)
• Isolation: Fully isolated, ±300 VDC/Vrms
• AC Measurement: Up to 425 Vp

Speed & Throughput

• DMM Reading Rates: 100 S/s (6½ digits), 3 kS/s (5½ digits), 1.8 MS/s (digitizer mode)
• DC Range/Function Change: 100/s
• DC Auto Range (Voltage): 5 ms
• DC Auto Range (Resistance): 50 ms
• Trigger Latency: 2 µs
• Maximum DC Trigger Rate: 6 kHz
• Maximum AC Trigger Rate: 1 kHz
• AC Range/Function Change: 10/s
• AC Auto Range: 250 ms

Calibration
• Calibration Interval: 2 years
• Suggested Warm-up Time: 1 hour

– Key Features

• FlexDMM technology for measurement versatility
• Diode test and frequency/period measurement
• Configurable resolution from 3 to 6.5 digits
• High trigger rate (DC: 6 kHz, AC: 1 kHz)
• Fast DC auto-range at 5 ms

– Typical Applications

• Production floor automated testing
• R&D precision measurement
• High-voltage circuit characterization
• Waveform acquisition and time/frequency domain analysis

– Compatibility & Integration

• PXI Hybrid Slot Compatible (standard PXI and PXI Express)
• Instrument Driver: NI-DMM (IVI-compliant)
• Programming: C/C++, .NET, Visual Basic, LabVIEW, LabWindows/CVI
• Waveform Analysis: LabVIEW time and frequency domain capabilities