The Keithley Series 2281S-20-6 is a single-output dynamic model battery simulator and precision DC bench power supply delivering 120 W across a 20 V, 6 A source range with 1 A sink capability. It combines high-precision DC sourcing, battery charging, and battery emulation in one instrument—enabling engineers to test battery-dependent devices under realistic discharge profiles without physical batteries. The unit stores up to 14 battery models, including 5 built-in emulator models, and uses a 101-point dynamic model to define open circuit voltage and internal resistance as functions of state of charge. Internal resistance simulation extends to 100 Ω.
## Technical Specifications
• **Output:** 1 channel, 120 W maximum
• **Voltage:** 0–20 V with 100 µV resolution
• **Source Current:** 0–6 A
• **Sink Current:** 0–1 A maximum
• **Measurement Accuracy:** Up to 6½ digits with DMM-quality precision; source setting accuracy 0.02%
• **Current Ranges:** 10 A, 1 A, 100 mA, 10 mA
• **Display:** 4.3-inch color TFT LCD, 6½-digit resolution
• **Sampling Rate:** 1.5 ms
• **Memory:** 2500 locations
• **Battery Testing:** Charge to 6 A, discharge to 1 A; automatic capacity (Amp-Hour) and ESR computation
• **Interfaces:** GPIB, USB, LAN, Digital I/O
• **Power Input:** 100–240 VAC
• **Operating Range:** 0–40 °C; 0–80% relative humidity
• **Dimensions:** 4.22 × 10.1 × 16.34 inches; 14 kg
## Key Features
• Dynamic and static simulation modes for battery behavior across discharge cycles
• Parametric battery models: open circuit voltage (Voc), internal resistance, state of charge (SoC), remaining capacity, terminal voltage (Vt)
• Stores custom battery models generated from measured charge-cycle data
• Built-in graphing for voltage and current waveform analysis
• High-resolution icon-based TFT interface with soft-key control
## Typical Applications
• Battery-powered device development and validation
• Low-battery condition testing and performance analysis
• Battery model generation from measured charge characteristics
• Device runtime estimation under variable battery states
## Compatibility & Integration
GPIB, USB, LAN, and Digital I/O connectivity enable integration into automated test systems and remote operation environments.
