Model Explanation

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

4132: NI PXI SMU series code, representing four-quadrant, ±100 V, 2 W, pA level accuracy, isolation.

Component Number: 779647-01 (standard version, without auxiliary power supply).

Location: High-voltage high-precision SMU, providing four-quadrant source / suction capability, suitable for high-voltage leakage, weak current, high-resistance testing.

III. Technical Parameters (23 ℃ ± 5 ℃, preheating 30 min)

(1) Channel Configuration

Channel Type Voltage Range Current Range Power Isolation

CH0 (SMU) Quadrant Source / Suction ±100 V (2 positions: ±20 V / ±100 V) ±100 mA (3 positions: 100 μA / 1 mA / 100 mA) Source 2 W / Suction 2 W ±150 VDC (Channel - Ground)

(2) Programmable Control and Measurement Accuracy (18 bits)

Voltage (CH0)

Resolution: ±100 V position 1.2 mV; ±20 V position 0.24 mV.

Accuracy: 0.02% reading + 5 mV (100 V).

Current (CH0, 3 positions)

Resolution: 10 pA (100 μA position) ~ 1 μA (100 mA position).

Accuracy: 75 ppm reading + 10 pA (100 μA position).

Readback Rate: Maximum 1 kS/s (Voltage / Current Synchronization).

4-Wire Remote Sensing: Supports Kelvin measurement, eliminating lead resistance error.

Protection: Integrated external protection, suppressing leakage current to pA level.

(3) Dynamic and Protection

Ripple Noise: ≤ 2 mVpp (20 MHz bandwidth).

Rise Time: ≤ 1 ms (10% to 90%).

Load Regulation Rate: ≤ 0.005% (full load change).

Protection Mechanism: Overvoltage, Overcurrent, Overheat, Reverse Polarity, hardware + software dual protection; High-voltage interlock (optional).

(4) Electrical / Mechanical / Environmental

Power Supply: PXI backplane (+5 V/+12 V), no need for auxiliary power supply.

Power Consumption: Internal approximately 8 W; External full load approximately 12 W.

Connector: Triaxial (three coaxial) terminals (CH0/Guard/Sense/Isolated GND).

Size / Weight: 3U single slot (216×20×130 mm); approximately 350 g.

Safety: IEC 61010-1, CAT I 150 V.

Temperature: Operating 0 ℃~55 ℃; accuracy guaranteed 15 ℃~35 ℃.

Calibration Cycle: 1 year (NIST traceable).

IV. Interface and Communication Configuration

(1) Front-End I/O (Triaxial Three-Coaxial)

CH0 (SMU): ±100 V isolated output.

Sense+ / Sense‑: 4-wire remote sensing end (Kelvin measurement).

Guard: Protection end (suppress surface leakage current).

Isolated GND: Isolated ground (separated from system ground).

Shield: Optional connection to chassis ground.

(2) Status Indicator Lights (Panel)

CH0 Status: Off = Disabled; Green = Constant Voltage (CV); Amber = Constant Current (CC); Red = Fault (Over Temperature / Over Current / High Voltage Interlock).

Remote Sense: Off = Local; Green = Remote Sensing Enabled. Guard: Green = Protection Enabled.

(III) Bus and Software

Bus: Standard PXI, compatible with PXIe, supports PXI Trigger synchronization.

Driver: NI-DCPower (IVI), supports LabVIEW/TestStand/Python/C#.

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

Synchronization: PXI Trigger/PFI, multi-module synchronization delay ≤ 1 μs; up to 17 modules in parallel per chassis.

V. Core Functions

Four-Quadrant Bidirectional Power (CH0): Supply power in I/III quadrants, absorb power in II/IV quadrants, replacing high-voltage power supply + precision load.

pA-level Ultra-High Precision Measurement: Minimum 10 pA resolution, suitable for leakage current, weak current, high-resistance testing.

±150 V Isolated Output: Channels are isolated from the system ground, avoiding ground loops, suitable for floating ground/high-voltage testing.

Integrated Protection (Guarding): Three-coaxial protection design, suppressing external leakage current, improving the stability of weak current measurement.

4-Wire Kelvin Measurement: Eliminates lead resistance errors, essential for precise resistance / high-resistance device testing.

High Voltage High Precision: ±100 V high-voltage output, 0.02% voltage accuracy, suitable for high-voltage device parameter testing.

Board-level Hardware Sequencing: High-speed I-V measurement, supports diodes, OLEDs, transistors for rapid characteristic analysis.

Multi-module Synchronization Parallel: Up to 17 modules can be synchronized in the same chassis, expanding the multi-channel high-voltage SMU testing system.

VI. Application Scenarios

High Voltage Testing for Semiconductor Devices: Breakdown voltage, leakage current, high-resistance testing of MOSFET/IGBT; Reverse leakage current, zener voltage testing of diodes.

Insulation Materials / Dielectric Testing: Ultra-high resistance / leakage testing of PCB, cables, insulating films (pA level).

Optoelectronic Device Testing: Weak current / high-voltage reverse bias testing of photodiodes, photovoltaic cells.

High Resistance Testing of Passive Components: Insulation resistance / leakage current measurement of high-voltage resistors, capacitors, inductors.

High Voltage Testing for Automotive Electronics: Reliability testing of high-voltage sensors, wiring harnesses, insulation components.

ATE Mass Production Testing: High-precision parameter mass testing of high-voltage devices, high-resistance components.

VII. Usage and Maintenance Instructions

(I) Installation and Power On

Installation: Disconnect power, insert PXI single slot, tighten panel screws; ensure good grounding of the chassis.

Preheating: Power on for 30 minutes to ensure pA-level accuracy; NI MAX confirms the equipment is normal and there are no error reports during self-check.

Heat Dissipation: Ensure the chassis fan is normal, environmental temperature ≤ 55 ℃, avoid blocking the ventilation ports.

(II) Wiring and Operation

Three-coaxial Wiring: CH0 must use three-coaxial cable, Guard terminal connects to the device protection ring to suppress leakage current.

Isolated Channel Wiring: CH0 connects to Isolated GND,严禁 mixing with the system ground， to avoid ground loop interference.

4-Wire Remote Sensing： When conducting long-distance or high-resistance testing， be sure to connect Sense+ / Sense‑ to eliminate lead errors.

High Voltage Safety： When outputting ±100 V， strictly isolate to avoid short circuits； high-voltage operation requires wearing insulating gloves.

Guard Protection Enabled： For weak current testing， the Guard protection must be enabled to reduce the influence of surface leakage current.

(III) Maintenance and Calibration

Regular Calibration： Once a year， external NIST traceable calibration； daily internal self-calibration to compensate for temperature drift.

Cleaning and Maintenance： Regularly clean the dust on the three-coaxial terminals， keep dry； when idle for a long time， disconnect power and cover the terminals for protection. Environmental Control: Working environment: 0 ℃ to 55 ℃, no condensation, low humidity (<60% RH), away from strong vibration / strong electromagnetic interference.

Prohibition for Use: Prohibit use with overpressure (>±110 V) / overcurrent (>110 mA); Avoid frequent short-circuit impacts; The isolation channel must not be operated with grounding.