Measuring low DC currents may demand more than a DMM can deliver. Electrometers measure low currents but have costly circuitry and functions. The Keithley 6485 5-digit Picoammeter offers sensitive current measurement instrumentation with enhanced speed and robust design. With eight current measurement ranges and high speed autoranging, it measures currents from 20fA to 20mA. The 6485 makes picoamp-level measurements affordable to most laboratories and production floors.

• Scaled voltage analog output. This output allows the Model 6485 to transmit measurement results to devices like DMMs, data acquisition boards, oscilloscopes, or strip chart recorders.
• 220V overload protection. This high overload protection and a robust design let the Model 6485 withstand abusive overflows.
• One-touch front panel design. Functions can be configured easily with the push of a button, without complicated function menus.
• Built-in Trigger Link interface. The Trigger Link interface simplifies synchronizing the Model6485 with other instruments and voltage sources. This interface combines six independent selectable trigger lines on a single connector for simple, direct control over all instruments in a system.
• RS-232 and IEEE-488 interfaces. These interfaces make it easy to integrate the Model 6485 into automated test and measurement systems.
• Display on/off switch. For research on light-sensitive components, such as measuring the dark currents of photodiodes, the front panel display can be switched off to avoid introducing light that could significantly reduce the accuracy of the results.
• REL and LOG functions. The Model 6485 can make relative readings with respect to a baseline value or display the logarithm of the absolute value of the measured current.
• Resistance calculations. The Model 6485 can calculate resistance by dividing an externally sourced voltage value by the measured current.
• Rear panel BNC inputs. Inexpensive, easy-to-use BNC cables can be employed, rather than more expensive triax cables.

Picoammeter Accessories
Adapters
RS Stock No. 7600339 7078-TRX-BNC (Coaxial adapter)

Cable and Interface Accessories
RS Stock No. 8470093 7007-1 (Shielded GPIB cable)
RS Stock No. 2409953 8501-1 (Trigger Link Cable)
RS Stock No. 7600341 KPCI-488LPA (Low Profile IEEE-488 Interface Board)
RS Stock No. 7600345 KUSB-488B (IEEE-488.2 USB-TO-GPIB Interface Adapter)

Rack Mount Kits
RS Stock No. 9223003 4288-1 (Single Rackmount Kit)
RS Stock No. 2409953 4288-2 (Dual Rackmount Kit)

Software Options
Kickstart www.tek.com/en/products/keithley/keithley-control-software-bench-instruments/kickstart

KickStart www.tek.com/en/products/keithley/keithley-control-software-bench-instruments/kickstart

For full list of accessories, application and software options, please see datasheet

Keep your instrument up to date and to enhance the functionality, please visit Tektronix website for the latest software updates at https://www.tek.com/en/products/software

• Optoelectronics
• Semiconductors
• Advanced Material Science
• Battery Testing
• Education
• Manufacturing test/troubleshooting

Keithley