The Keithley SM-03 (KM-SM-20V3-517-03) is a single-channel source measure unit delivering integrated sourcing and measurement in one instrument. It provides four-quadrant operation for both voltage and current, enabling precise component characterization and device testing across research and production environments. The unit combines 6½-digit measurement resolution with 0.012% basic accuracy and output power up to 20 W, making it suitable for applications requiring simultaneous control and acquisition of electrical parameters.
## Technical Specifications
**Electrical Ranges**
• Voltage source/measure: 20 mV to 200 V
• Current source/measure: 10 nA to 1.05 A (105 mA at 200 V range)
• Resistance measurement: 2 Ω to 200 MΩ
• Nominal DC voltage: 20 V; AC voltage: 3 V
• Maximum output power: 20 W
**Measurement Performance**
• Resolution: 6½-digit
• Basic accuracy: 0.012% (at terminals with A/D autozero enabled)
• Temperature coefficient: ±(0.15 × accuracy specification)/°C for 0–18 °C and 28–50 °C
• Overrange: 105% on both source and measure
• Readings per second: Up to 1700 at 4½ digits via GPIB
**Regulation & Limits**
• Voltage regulation (line): 0.01% of range
• Voltage regulation (load): 0.01% of range + 100 μV
• Current regulation (line): 0.01% of range
• Current regulation (load): 0.01% of range + 100 pA
• Guard output impedance: 0.5 Ω (DC) in ohms mode
## Key Features
• Four-quadrant sourcing and sinking capability
• Bipolar current and voltage limit controls
V-Limit/I-Limit accuracy adds 0.3% of setting plus ±0.02% of reading
• 4-wire remote sense for resistance measurement
• One-year calibration period
## Typical Applications
Component characterization, device testing, and electrical parameter verification in laboratory and production test environments.
## Compatibility & Integration
GPIB connectivity enables integration into automated test systems and data acquisition setups.
