Keithley 6487 Reference Manual

Model 6487 Reference Manual Range, Units, Digits, Rate, and Filters 4-5
Programming example — range and digits
The following command sequence selects the 20mA range and sets display resolution to 3:
*RST ' Restore RST defaults.
CURR:RANG 0.02 ' Set to 20mA range.
DISP:DIG 3.5 ' Set display resolution to 3 digits.
Table 4-3
Ranges and values
Range <n> value
Display (5 digit
resolution)
20mA
2mA
200µA
20µA
2µA
200nA
20nA
2nA
2E-2 or 0.02
2E-3 or 0.002
2E-4 or 0.0002
2E-5 or 0.00002
2E-6 or 0.000002
2E-7 or 0.0000002
2E-8 or 0.00000002
2E-9 or 0.000000002
00.0000mA
0.00000mA
000.000µA
00.0000µA
0.00000µA
000.000nA
00.0000nA
0.00000nA

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%