The National Instruments PXI-4070 is a high-performance 6½-digit digital multimeter (FlexDMM) and a 300 V isolated waveform digitizer in a single-slot PXI module. It delivers exceptionally fast measurement speeds of up to 100 S/s at 6½ digits and up to 3 kS/s at 5½ digits, alongside high-precision 10-bit to 23-bit waveform acquisition up to 1.8 MS/s. Designed for automated testing, R&D, and production environments, it integrates seamlessly with NI switches for high-density, multi-channel data acquisition.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | PXI backplane |
| Display | None (Virtual front panel via host PC) |
Physical
| Parameter | Value |
|---|---|
| Operating Temperature | 0 °C to 55 °C |
| Dimensions (W×H×D) | 20 mm × 130 mm × 216 mm |
Resolution and Display
| Parameter | Value |
|---|---|
| Digits of Resolution | 6½ digits |
| Display Type | Virtual front panel (no physical display) |
DC Voltage
| Parameter | Value |
|---|---|
| DC Voltage Ranges | 100 mV, 1 V, 10 V, 100 V, 300 V |
| DC Voltage Best Accuracy | ±6 ppm |
| DC Voltage Best Resolution | 100 nV |
| DC Voltage Input Impedance | >10 GΩ (100 mV to 10 V ranges), 10 MΩ (100 V and 300 V ranges) |
| DC Voltage Normal Mode Rejection Ratio (NMRR) | >60 dB (at 50 Hz / 60 Hz) |
| DC Voltage Common Mode Rejection Ratio (CMRR) | >140 dB (at 50 Hz / 60 Hz) |
AC Voltage
| Parameter | Value |
|---|---|
| AC Voltage Measurement Type | True-RMS |
| AC Voltage Ranges | 50 mV, 500 mV, 5 V, 50 V, 300 V |
| AC Voltage Frequency Range | 1 Hz to 300 kHz |
| AC Voltage Best Resolution | 100 nV |
| AC Voltage Input Impedance | 1 MΩ in parallel with 90 pF |
| AC Voltage Maximum Crest Factor | 4.5 |
DC Current
| Parameter | Value |
|---|---|
| DC Current Ranges | 20 mA, 200 mA, 1 A |
| DC Current Best Resolution | 10 nA |
| DC Current Input Protection | F 1.25 A 250 V fast-acting fuse |
AC Current
| Parameter | Value |
|---|---|
| AC Current Measurement Type | True-RMS |
| AC Current Ranges | 10 mA, 100 mA, 1 A |
| AC Current Frequency Range | 1 Hz to 10 kHz |
| AC Current Best Resolution | 10 nA |
Resistance
| Parameter | Value |
|---|---|
| Resistance Measurement Configurations | 2-wire, 4-wire, 6-wire (with PXI-4022 accessory) |
| Resistance Ranges | 100 Ω, 1 kΩ, 10 kΩ, 100 kΩ, 1 MΩ, 10 MΩ, 100 MΩ |
| Resistance Best Resolution | 100 µΩ |
| Offset Compensation | Supported (Offset Compensated Ohms) |
Frequency and Period
| Parameter | Value |
|---|---|
| Frequency Range | 1 Hz to 500 kHz |
| Period Range | 2 µs to 1 s |
Digitizer / Waveform Acquisition
| Parameter | Value |
|---|---|
| Digitizer Sampling Rate | 10 S/s to 1.8 MS/s |
| Digitizer Resolution | 10 to 23 bits (flexible resolution dependent on sampling rate) |
| Digitizer Maximum Input Voltage | ±300 V |
| Digitizer Bandwidth | 300 kHz |
| Digitizer Input Coupling | DC |
System Speed and Performance
| Parameter | Value |
|---|---|
| Reading Rate at 6½ Digits | 100 S/s |
| Reading Rate at 5½ Digits | 3 kS/s |
| Integration Time | Variable (software-programmable) |
| Guarding Module Accessory | NI PXI-4022 (enables 6-wire resistance & picoampere measurements) |
| Recommended Switch Modules | NI PXI-2527 (64-channel 300 V multiplexer), NI PXI-2530 (128-channel reed relay multiplexer) |
Triggering and Math Functions
| Parameter | Value |
|---|---|
| Trigger Sources | PXI Trigger lines, PXI Star Trigger, Immediate, Software, External (via PXI chassis) |
Power and Environmental
| Parameter | Value |
|---|---|
| Storage Temperature Range | -40 °C to 70 °C |
| Operating Humidity Range | 10% to 90% RH (non-condensing) |
| Warm-up Time | 60 minutes |
| Calibration Interval | 1 year |
| Measurement Category (CAT) Rating | CAT I (300 V) |
| Overvoltage Protection | 300 VDC/VAC |
Physical Characteristics
| Parameter | Value |
|---|---|
| Form Factor | 3U PXI (1 slot) |
| Front Panel Connectors | 4 Banana jacks (HI, LO, HI Sense, LO Sense) |
Power
| Parameter | Value |
|---|---|
| PXI Backplane Power Draw (+5 V) | 1.1 A max |
| PXI Backplane Power Draw (+12 V) | 150 mA max |
Interfaces
| Parameter | Value |
|---|---|
| Bus Connector | 32-bit PXI/cPCI |
Safety & Protection
| Parameter | Value |
|---|---|
| Maximum Common-Mode Voltage | 300 V DC or AC rms (between LO and Earth Ground) |
Measurements
| Parameter | Value |
|---|---|
| Diode Test Current | 1 mA (fixed) |
| Supported Temperature Sensors | RTD (Pt100, Pt385, Pt392), Thermistors (2.2k, 3k, 5k, 10k, 30k) |
Digitizer Specifications
| Parameter | Value |
|---|---|
| Digitizer Resolution Range | 10 to 23 bits |
Noise Rejection & Isolation
| Parameter | Value |
|---|---|
| AC Common Mode Rejection Ratio (CMRR) | >70 dB (DC to 60 Hz, 1 kΩ imbalance in LO lead) |
Input Characteristics
| Parameter | Value |
|---|---|
| Input Bias Current | <30 pA |
Environmental & Safety
| Parameter | Value |
|---|---|
| Pollution Degree | 2 |
| Maximum Operating Altitude | 2000 m |
Software & Control
| Parameter | Value |
|---|---|
| Software Driver Support | NI-DMM |
Technology
Solid-state FlexDMM
Applications
Automated Test Equipment (ATE), high-precision measurement, R&D, and production testing
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