Keithley 6487 Reference Manual

3-2 Measurements and Sourcing Voltage Model 6487 Reference Manual
Measurement overview
Current measurements
The basic current measurement capabilities of the Model 6487 are summarized in
Table 3-1. Accuracy for each measurement function and range is listed in the specifica-
tions (Appendix A).
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 3-1
Basic current measurement capabilities
Range Maximum Reading 5 -Digit Resolution
2nA
20nA
200nA
2uA
20uA
200uA
2mA
20mA
±2.1nA
±21nA
±210nA
±2.1µA
±21µA
±210µA
±2.1mA
±21mA
10fA
100fA
1pA
10pA
100pA
1nA
10nA
100nA
Table 3-2
Basic voltage source output capabilities
Range Maximum Output Step Size
10V
50V
500V
±10.1V
±50.5V
±505V
200µV
1mV
10mV

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%