Keithley 6485 User Manual

I
Applications Guide
• Measurement considerations — Covers measurement considerations for low current
measurements including Leakage currents and guarding, Input bias current, Voltage bur-
den, Noise and source impedance, Electrostatic interference and shielding, and also
Making connections.
• Applications — Covers applications to measure Diode leakage current, Capacitor leak-
age current, Measuring high resistance with external bias source, Cable insulation resis-
tance, Surface insulation resistance (SIR), Photodiode characterization prior to dicing,
Focused ion beam applications and Using switching systems to measure multiple current
sources as shown in “External triggering,” page 7-11.

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)