The Keysight (formerly Agilent/HP) E3631A is an 80 W triple-output programmable DC power supply widely used in benchtop and automated test applications. It features one 6 V/5 A output and two ±25 V/1 A outputs, offering clean power with low ripple and noise. The unit includes built-in GPIB and RS-232 interfaces for remote programming and monitoring, alongside precise readback capabilities.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | GPIB, RS-232 |
| Display | Vacuum Fluorescent Display (VFD) |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 115 Vac ± 10% (standard), 100 Vac or 230 Vac ± 10% (by option); 47-63 Hz; 250 VA maximum |
| Operating Temperature | 0 to 40 °C |
| Dimensions (W×H×D) | 212.6 × 132.6 × 348.3 mm |
| Weight | 8.2 kg |
| Cooling | Fan cooled |
Output Ratings
| Parameter | Value |
|---|---|
| Number of Outputs | 3 |
| Maximum Total Output Power | 80 W |
| Output 1 Voltage Range | 0 to 6 V |
| Output 1 Current Range | 0 to 5 A |
| Output 2 Voltage Range | 0 to +25 V |
| Output 2 Current Range | 0 to 1 A |
| Output 3 Voltage Range | 0 to -25 V |
| Output 3 Current Range | 0 to 1 A |
Programming Accuracy
| Parameter | Value |
|---|---|
| Voltage Programming Accuracy | 0.05% + 20 mV (±25 V outputs), 0.1% + 5 mV (6 V output) |
| Current Programming Accuracy | 0.15% + 4 mA (±25 V outputs), 0.2% + 10 mA (6 V output) |
Readback Accuracy
| Parameter | Value |
|---|---|
| Voltage Readback Accuracy | 0.05% + 10 mV (±25 V outputs), 0.1% + 5 mV (6 V output) @ 25°C ±5°C |
| Current Readback Accuracy | 0.15% + 4 mA (±25 V outputs), 0.2% + 10 mA (6 V output) @ 25°C ±5°C |
Regulation
| Parameter | Value |
|---|---|
| Voltage Load Regulation | < 0.01% + 2 mV |
| Current Load Regulation | < 0.01% + 250 µA |
| Voltage Line Regulation | < 0.01% + 2 mV |
| Current Line Regulation | < 0.01% + 250 µA |
Ripple and Noise
| Parameter | Value |
|---|---|
| Normal Mode Voltage RMS | < 350 µV rms (20 Hz to 20 MHz) |
| Normal Mode Voltage Peak-to-Peak | < 2 mV p-p (20 Hz to 20 MHz) |
| Normal Mode Current RMS | < 500 µA rms (±25 V outputs), < 2 mA rms (6 V output) |
| Common Mode Current RMS | < 1.5 µA rms |
Performance
| Parameter | Value |
|---|---|
| Transient Response Time | < 50 µs to recover within 15 mV for a 50% change in load current |
| Output Tracking Accuracy | ± (0.2% of output + 20 mV) for ±25V outputs |
| Warm-Up Time | 1 hour (for specified accuracy) |
| Remote Sensing | Not supported (local sensing only) |
Safety & Protection
| Parameter | Value |
|---|---|
| Isolation to Ground | ±240 Vdc maximum (between any output terminal and earth ground) |
Environmental
| Parameter | Value |
|---|---|
| Storage Temperature | -40 °C to 70 °C |
| Maximum Altitude | 2000 meters |
| Pollution Degree | 2 |
| Installation Category | II |
Power
| Parameter | Value |
|---|---|
| AC Input Voltage | 115 Vac ±10% (standard); 100 Vac or 230 Vac ±10% (by option) |
| AC Input Frequency | 47 Hz to 63 Hz |
| Maximum Input Power | 250 VA |
Configuration
| Parameter | Value |
|---|---|
| Output Topology | All three outputs share a common COM terminal |
Software & Control
| Parameter | Value |
|---|---|
| State Storage Memory | 3 user-configurable operating states (Store/Recall) |
| Programming Language | SCPI |
Technology
Programmable DC Power Supply
Applications
Benchtop and Automated Test Equipment (ATE)