Keithley 6512 Programmable Electrometer

The Keithley 6512 Programmable Electrometer measures extremely low currents and very high resistances with exceptional sensitivity and accuracy. Built for advanced research, quality control, and production testing, it delivers precise characterization of current, voltage, charge, and resistance across 16 measurement ranges each. The instrument achieves femtoampere-level sensitivity with input bias current below 1 fA typical and input impedance exceeding 200 GΩ, making it ideal for applications where minute electrical signals demand reliable quantification.

– Technical Specifications

Current Measurement
• Ranges: 1 fA to 20 mA (16 ranges)
• Accuracy: 0.1% of reading + 2 counts on the 2 mA range
• Input bias current: < 1 fA typical; 200 GΩ

Resistance Measurement
• Ranges: 1 kΩ to 20 TΩ (16 ranges)
• Accuracy: 0.5% of reading + 5 counts on the 200 GΩ range
• Source voltage: 1 V to 10 V (programmable)

Charge Measurement
• Ranges: 1 pC to 2 µC (16 ranges)
• Accuracy: 0.2% of reading + 5 counts on the 2 µC range

General
• Resolution: Minimum 1000 counts across most ranges
• Warm-up time: 30 minutes for rated accuracy
• Operating temperature: 0°C to 50°C
• Power: 90–132 VAC or 195–264 VAC, 48–63 Hz; 100–120 VDC or 200–240 VDC
• Power consumption: ~30 VA
• Dimensions: Standard half-rack width
• Weight: 6.4 kg (14 lbs)

– Key Features

• Offset current compensation to null input bias current
• Analog output for proportional voltage signal and data logging
• IEEE-488 (GPIB) digital interface for remote control and automation
• Half-rack form factor designed for integration with low-current test fixtures

– Typical Applications

Semiconductor characterization, materials research, photodiode measurement, high-impedance sensor evaluation, and production testing of components requiring femtoampere sensitivity.

– Compatibility & Integration

Integrates with low-current test fixtures to minimize leakage and interference. IEEE-488 control enables automated test systems.