The Keithley 2100/230-240 is a 6½-digit USB digital multimeter engineered for precision measurement across benchtop and system applications. It delivers 0.0038% basic DC voltage accuracy on the 10V range and 0.013% resistance accuracy on the 10kΩ range, supporting measurements in DC/AC voltage, DC/AC current, resistance, frequency, period, temperature, diode testing, and continuity. The instrument achieves 50 triggered readings per second at full 6½-digit resolution via USB, or exceeds 2000 readings per second at 4½-digit resolution when using fast measurement mode with internal 2000-reading buffer storage.
## Technical Specifications
• **Resolution:** 6½ digits
• **DC Voltage Accuracy (1-year, 10V range):** 0.0038%
• **Resistance Accuracy (1-year, 10kΩ range):** 0.013%
• **Measurement Rate (USB):** 50 triggered readings/s at 6½ digits
• **Measurement Rate (Fast Mode):** >2000 readings/s at 4½ digits into 2000-reading buffer
• **DC Voltage Ranges:** 0.1V, 1V, 10V, 100V, 1000V
• **AC Voltage Ranges:** 0.1V, 1V, 10V, 100V, 750V (True RMS)
• **DC Current Ranges:** 10mA, 100mA, 1A, 3A
• **AC Current Ranges:** 1A, 3A (True RMS)
• **Resistance Ranges:** 100Ω to 100MΩ; maximum 0.1GΩ measurement capability
• **Frequency Measurement:** 3 Hz to 300 kHz
• **Temperature Measurement:** -100°C to +630°C
• **Input Protection:** 1000V on all 2-wire resistance ranges
• **Math Functions:** RATIO, %, Min/Max, NULL, Limits, mX+b, dB, dBm
• **Operating Temperature:** 5°C to 40°C
## Key Features
• 5×7 dot matrix VFD with three-color annunciators
• USB 2.0 TMC-compliant interface for SCPI test program control
• Selectable front/rear inputs for bench or rack deployment
• Rugged construction with removable rubber bumpers and integrated carrying handle
• Included PC software utilities for graphing and data export to Microsoft Office, Word, and Excel
## Typical Applications
This multimeter serves R&D laboratories, system integrators, and field technicians requiring high-resolution DC/AC measurements, component characterization, and automated test sequences via USB control.
## Compatibility & Integration
USB 2.0 TMC interface supports SCPI programming. Software packages provide integration with Microsoft Office suite and Excel for real-time data visualization and analysis.
