Keithley 6487 Reference Manual

3
Measurements and
Sourcing Voltage
• Measurement overview — Explains the basic measurement and voltage source
capabilities of Model 6487.
• Performance considerations — Covers warm-up period, voltage offset correction,
autozero, zero check, and zero correct.
• Current measurements — Provides a basic procedure to measure current.
• Ohms measurements — Covers methods to set up and use the ohms measurement
function.
• Voltage source operation — Discusses configuring and using the voltage source.
• Alternating voltage ohms mode — Discusses the alternating voltage mode that
can be used to improve accuracy and repeatability of very high resistance
measurements.

Keithley 6487 Specifications

General

Type	Picoammeter/Voltage Source
Current Measurement Range	20 fA to 20 mA
Interfaces	GPIB, RS-232
Voltage Burden	< 200 µV
Input Impedance	>10^14 Ω
Power	100 V / 120 V / 220 V / 240 V
Basic Current Measurement Accuracy	0.4%