II. Model Interpretation

PXI: 3U PXI standard bus, single slot, compatible with PXI/PXIe hybrid chassis.

4072: FlexDMM series, representing 6½ digit, ±300 V, with LCR, 1.8 MS/s isolation digital instrument.

778270-01: Original part number, used for ordering and traceability.

Positioning: DMM + LCR + digital instrument in one unit, replacing bench 6½ digit meter + LCR meter + isolated acquisition card, suitable for medium voltage, high precision + impedance testing requirements.

III. Technical Parameters (25 ℃ ± 1 ℃, calibration cycle 2 years, preheating 30 minutes)

(1) DMM Function

DC Voltage (DCV)

Range: 100 mV / 1 V / 10 V / 100 V / 300 V

2-year accuracy: 15 ppm reading + 0.5 ppm (10 V)

AC Voltage (True RMS)

Range: 100 mV - 300 V

Bandwidth: 10 Hz - 100 kHz

Accuracy: 0.02% reading + 50 μV (10 V @ 1 kHz)

DC Current (DCI)

Range: 10 mA / 100 mA / 1 A

Accuracy: 0.05% reading + 20 nA (1 A)

AC Current (True RMS)

Range: 10 mA - 1 A

Bandwidth: 10 Hz - 100 kHz

Resistance (Ω)

2-wire: 10 Ω - 5 GΩ; 4-wire: 10 Ω - 1 MΩ

4-wire accuracy: 0.01% reading + 10 mΩ (1 kΩ)

Frequency / Period: 10 Hz - 100 kHz, accuracy 0.01%

Resolution / Rate: 6½ digit (22 bit); 6½ digit 100 times / second, 5½ digit 3,000 times / second

(2) LCR Measurement (Core Feature)

Capacitance C: 300 pF - 10,000 μF; basic accuracy 0.25%; rate up to 20 times / second

Inductance L: 1 mH - 5 H; basic accuracy 0.25%; rate up to 20 times / second

Measurement Method: 2-wire AC current method, supports open circuit / short circuit compensation NI

(3) Isolated Digital Instrument

Sampling Rate: Up to 1.8 MS/s (single channel)

Resolution: 10 - 22 bit adjustable

Input Range: ±10 V / ±100 V / ±300 V (isolated)

Bandwidth: DC - 500 kHz

Isolation Voltage: 300 Vrms (channel - ground)

Trigger: Edge / Window / Pulse Width / Digital Trigger, delay ≤ 2 μs

(4) Electrical / Mechanical / Environmental

Power Supply: PXI backplane; typical 8 W, maximum 12 WNI

Connectors: 5× safety banana sockets (gold plated low thermoelectric potential) + 9-pin DIN (trigger / AUX I/O)

Size: 3U single slot, 2.0 cm × 13.0 cm × 21.6 cmNI

Weight: Approximately 370 gNI

Safety: IEC 61010-1, CAT III 300 V

Operating Temperature: 0 ℃ - 55 ℃ (accuracy guaranteed 15 ℃ - 35 ℃)

Calibration Cycle: 2 years (NIST traceable)

IV. Interface and Communication Configuration

(1) Front-End I/O

5× safety banana sockets (gold-plated low thermoelectric potential)

HI/LO: Voltage / Current / Resistance Main Terminal

HI Sense/LO Sense: 4-wire Resistance Sensing Terminal

Ground: Digital Instrument Isolation Ground

9-pin DIN (AUX I/O): Trigger Input/Output, PXI Trigger Synchronization, SCXI Communication

(II) Bus and Software

Bus: Standard PXI, Compatible with PXIe Mixed Slot

Driver: NI-DMM (IVI) + NI-Digitizer

Software: LabVIEW, TestStand, LabWindows/CVI, Python, C/C++, .NET

Configuration: NI MAX (Identification, Self-Check, Self-Calibration, Trigger Settings)

Synchronization: PXI Trigger, PFI, Multi-module Synchronization Delay ≤ 2 μs

VII. Core Functions

6½-digit High Precision DMM: DC Accuracy ppm Level, Suitable for Precise Parameter Testing.

±300 V High Voltage Isolation: 300 Vrms Isolation, Safe Measurement of Medium High Voltage Grounded Signals.

LCR Function: Capacitance / Inductance 0.25% Basic Accuracy, Covers Production Test of Components.

1.8 MS/s Isolated Digital Converter: Captures 300 V Level Transients, Ripples, Switching Waveforms.

4-wire Kelvin Resistance: Eliminates Lead Error, Suitable for Precise Resistors / RTD.

True RMS AC Measurement: Accurate Measurement of Frequency Converters, Switching Power Supplies, etc. Non-sinusoidal Waveforms.

Three-in-One Integration: Single Slot Replacement of DMM + LCR + Isolated Acquisition Card, Simplifies System, Reduces Cost.

Dual Internal Calibration: Internal Self-Calibration to Compensate for Temperature Drift, External Calibration to Ensure Long-Term Precision.

VI. Application Scenarios

Electronic Component Mass Production Testing: Capacitors, Inductors, Resistors, Diodes' Parameters + Impedance Testing.

Medium High Voltage Power Supply / Frequency Converter Testing: 300 V Level Power Supply, Inverters, Charging Module's Static Parameters + Ripple / Transient Waveforms.

Industrial Automation ATE: Consumer Electronics, Household Appliances, Automotive Electronics' Batch Precise Testing.

Precise Sensor Calibration: RTD, Thermocouple, Pressure Sensor's Resistance / Voltage + Dynamic Response Testing.

Power Electronics Research and Development: MOSFET, IGBT, etc. Device's Static Parameters + Switching Waveform Characterization.

General Laboratory Precision Measurement: Covers Voltage / Current / Resistance / LCR / Waveform Acquisition Requirements.

VII. Usage and Maintenance Instructions

(I) Installation and Power On

Disconnect power, insert PXI single slot, tighten panel screws.

Power On Preheat for 30 minutes to ensure 6½-digit accuracy.

NI MAX confirms equipment is normal, self-checks without errors.

(II) Wiring and Operation

High Voltage Safety: Use safety plugs ≥ 100 V; Do not input > 300 V.

4-wire Resistance: Current Terminal (HI/LO) and Sensing Terminal (Sense) are wired separately.

LCR Measurement: Use Open Circuit / Short Circuit Compensation to Eliminate Parasitic Resistance Error NI.

Current Range Protection: Replace 1 A Fast Fuse after Overload Power Off.

(III) Maintenance and Calibration

Regular Calibration: External Traceable Calibration Every 2 Years; Daily Internal Self-Calibration to Compensate for Temperature Drift.

Cleaning: Use Dry Cloth / Soft Brush to Remove Dust, Keep Interfaces Dry, Cover with Dust Cap When Not in Use for a Long Time.

Environment: 0 ℃～55 ℃, No Condensation, Away from Strong Vibration / Strong Electromagnetic Interference.

Prohibited: Do Not Use Beyond Measured Range / Beyond Isolation Voltage; Avoid Large Current Impact.