Keithley 6487 User Manual

3-2 Measurements and Sourcing Voltage Model 6485 and 6487 User’s Manual
Measurement overview
Current measurements
The basic current measurement capabilities of the Models 6485 and 6487 are summarized
in Table 3-1. Accuracy for each measurement function and range is listed in
the specifica-
tions (Appendix A).
Table 3-1
Basic Model 6485 and 6487 current measurement capabilities
Function Reading Range Available Ranges
Amps ±10fA to ±21mA 2nA, 20nA, 200nA,
2μA,
20μA, 200μA,
2mA, and 20mA
Model 6487 voltage source
The basic voltage source output capabilities of the Model 6487 are summarized in
Table 3-2. Accuracy specifications are shown in Appendix A.
Table 3-2
Basic Model 6487 voltage source output capabilities
Function Output Range Available Ranges
Source voltage ±200μV to ±505V 10V, 50V, 500V

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%