The Keithley 2701 Ethernet Multimeter System integrates digital multimeter, signal routing, and data logging functions into a single half-rack instrument. It delivers true 6½-digit resolution across voltage, current, resistance, and temperature measurements while simultaneously managing up to 200 differential input channels and 96 matrix crosspoints. The system supports scan rates to 500 channels/second or 3500 readings/second on a single channel, with 450,000-reading battery-backed memory for extended data capture. Ethernet connectivity via 10/100BaseTX enables remote operation and configuration through a built-in diagnostic web interface.
## Technical Specifications
**Measurement Resolution & Accuracy**
• True 6½-digit (22-bit) resolution
• DC Voltage (100 mV range): 0.1 µV resolution; 15 ppm of reading + 30 ppm of range (24-hour accuracy)
• Resistance (10 MΩ range): 15 ppm of reading + 6 ppm of range (24-hour accuracy); 100 µΩ resolution
• Temperature coefficient for DC voltage: (1 + 5)/°C; resistance: (1 + 1)/°C
**Data Acquisition**
• Maximum scanning rate: 500 channels/second
• Single-channel rate: 3500 readings/second
• Internal trigger rate (max): 2800/s
• External trigger rate (max): 2000/s
• Memory buffer: 450,000 readings (battery-backed)
**System Architecture**
• Input channels: Up to 200 differential (2-pole configuration)
• Matrix crosspoints: 96 maximum
• Plug-in slots: 2 for switch/control modules
• DC voltage protection: 1000 V
**Power Requirements**
• Selectable input: 100 V / 120 V / 220 V / 240 V AC
• Line frequency: 45–66 Hz, 360–400 Hz
• Power rating: 80 VA max at 50/60/400 Hz
**Physical**
• Half-rack width, 2U height
## Key Features
• Measurement functions: DCV, ACV, DCI, ACI, 2-wire/4-wire resistance with offset compensation, temperature (thermocouple/RTD/thermistor), frequency/period, continuity, event counting, digital I/O
• Ethernet: 10/100 Mbits/sec; RJ45; TCP/IP socket interface; 100 m maximum hardwired distance
• Secondary interfaces: RS-232 (9-pin D-Sub), GPIB (configuration varies), digital I/O (9-pin D-Sub)
• Rack-mount or benchtop configuration with front-panel probe access
## Typical Applications
Automated test equipment (ATE), research and development, industrial monitoring, and applications requiring simultaneous multi-channel measurement and signal routing.
## Compatibility & Integration
Ethernet control supports remote access and instrument diagnostics. GPIB and RS-232 interfaces provide legacy system integration. Plug-in module architecture enables customized switch configurations.
