Keithley 6487 Reference Manual

Model 6487 Reference Manual Calibration 16-5
Calibration menu
You can access the calibration menu by pressing MENU, selecting CAL, and then press-
ing ENTER. The various selections are summarized in Table 16-4. Use the up and down
RANGE keys to scroll through these selections.
Table 16-2
Current test uncertainty ratios with recommended equipment
Range 5700 + 5156
Test uncertainty
ratio
2nA 7ppm + 300ppm 13.0
20nA 7ppm + 200ppm 19.3
200nA 5ppm + 200ppm 9.8
2μA 7ppm + 200ppm 7.2
20μA 550ppm 1.8
200μA 100ppm 10.0
2mA 55ppm 18.2
20mA 55ppm 18.2
Table 16-3
Voltage source test uncertainty ratios with recommended equipment
Range 2001 DMM
Test uncertainty
ratio
10V 32ppm 31.2
50V 50ppm 20.0
500V 53ppm 28.3

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%