Keithley 6485 User Manual

2
Measurement Concepts
• Measurement overview — Explains the basic measurement capabilities of Model
6485.
• Performance considerations — Covers a couple of considerations that affect
overall performance; warm-up and autozero.
• Connection fundamentals — Covers fundamental information about connecting
test circuits to the picoammeter.
• Zero check and zero correct — Provides operation information on these two
important aspects of the basic measurement process.
• Measurement considerations — Summarizes the various factors that affect low
level measurements.

Keithley 6485 Specifications

General

Model	Keithley 6485
Category	Picoammeter
Input Impedance	>10^14 Ohms
Voltage Burden	<200µV
Accuracy	0.4% of reading
Voltage Source Range	Not Applicable
Voltage Source Resolution	Not Applicable
Voltage Source Accuracy	Not Applicable
Interface	IEEE-488
Power Requirements	100V to 240V AC, 50/60Hz
Dimensions	89 mm high x 214 mm wide x 369 mm deep (3.5 in x 8.4 in x 14.5 in)