Keithley 6485 Picoammeter pAmmeter 5-1/2 Digit Resolution Power

Product Overview This pre-owned Keithley 6485 5½ Digit Picoammeter has passed complete factory self-test and functional calibration. It is a dedicated ultra-sensitive low-current measuring instrument without built-in voltage source, featuring industry-leading 10fA minimum resolution and ultra-low input voltage burden <200µV. Widely used for semiconductor leakage, optoelectronic dark current, capacitor insulation resistance, sensor micro-current and material weak current characterization in labs and production lines. Core Technical Specifications Current Measurement Range: 20 fA ~ 20 mA, 8 full auto-ranging scales, 5.5 digit readout resolution down to 10 fA Ultra Low Voltage Burden: Less than 200 µV on all nA/pA ranges, only 1mV max on 20mA range, minimum circuit loading interference High Speed Sampling: Up to 1000 readings per second for fast batch device testing Data Storage Buffer: Internal memory stores up to 2500 measurement readings Dual Communication Interfaces: Standard IEEE-488 GPIB + RS232 serial port, full remote programming for automated test systems Analog Output Port: Scaled 2V full-scale analog signal output for external data acquisition or recorder connection 485 Emulation Mode: Compatible with legacy Keithley Model 485 program codes, seamless upgrade replacement Input Isolation Design: High isolation between meter common and chassis, suppress external EMI noise & stray leakage Typical Application Scenarios Semiconductor test: Diode, transistor reverse bias leakage current characterization Optoelectronics industry: Photodiode, LED, laser diode dark faint current testing Electronic component QC: Film capacitor insulation leakage, high-value resistor micro-current drift test Material science research: Insulating thin film, ceramic, plastic ultra-high impedance weak current monitoring Sensor & new energy: Photodetector, battery static micro-current aging reliability test Lab physics & radiation beam current monitoring