The Keithley 2231A-30-3 is a triple-channel programmable DC power supply delivering 195 W across three isolated output channels. Two channels provide 0–30 V DC at 0–3 A; the third delivers 0–5 V DC at 0–3 A. Independent control and remote sensing on all outputs enable precise, flexible power delivery for demanding test and measurement applications. The instrument combines high accuracy (0.06% voltage setting, 0.2% current setting), low noise (<5 mVp-p per output), and onboard setup memory for 30 configurations, making it essential for engineers designing and validating multi-rail circuits in laboratory and system integration environments.
## Technical Specifications
**Output Configuration**
• Three isolated channels: Channels 1 & 2 (0–30 V, 0–3 A each); Channel 3 (0–5 V, 0–3 A)
• Total power rating: 195 W
• Voltage resolution: 10 mV; Current resolution: 1 mA
• Voltage noise: <5 mVp-p per output
• Current ripple (20 MHz bandwidth): <6 mA RMS
**Accuracy & Stability**
• Voltage setting accuracy: 0.06%; readback accuracy: ±(0.06% + 20 mV) at 25 °C ±5 °C
• Current setting accuracy: 0.2%; readback accuracy: ±(0.2% + 10 mA) at 25 °C ±5 °C
• Voltage temperature coefficient: ±(0.03% of setting) per °C outside standard range
• Current temperature coefficient: ±(0.03% of setting) per °C outside standard range
• Line regulation: Voltage ±(0.02% + 4 mV); Current ±(0.2% + 3 mA)
• Load regulation: Voltage ±(0.02% + 4 mV); Current ±(0.2% + 3 mA) at 10–90% full scale
**Power Input & Display**
• Input: 110/230 VAC ±10%, 47–63 Hz
• Display: Vacuum fluorescent (VFD)
• Mounting: Benchtop
**Combined Channel Operation**
• Series (Channels 1 & 2): Up to 60 V DC
• Parallel (Channels 1 & 2): Up to 6 A
## Key Features
• All channels independently controlled with on/off switching per channel
• Remote sensing on all outputs for accurate voltage application at load terminals
• Per-channel output timer: 0.1 s to 99999 s for automated test sequences
• 30 setup memory locations for storing frequently used power configurations
• Front panel numerical keypad for direct parameter entry
## Typical Applications
• Multi-rail circuit design and validation
• Board-level power distribution testing
• Sensor and peripheral device powering during characterization
• Automated test sequences with programmable timing
## Compatibility & Integration
3-year warranty. Isolated outputs enable safe parallel and series combinations for extended voltage and current ranges.
