Keithley 6517B Reference Manual

Model 6517B Electrometer Reference Manual Appendix D: IEEE-488 bus overview
6517B-901-01 Rev. C / August 2015 D-9
SCPI commands
SCPI commands are commands that are particular to each device on the bus. These commands are
designated by the instrument manufacturer, and are based on the instrument model defined by the
Standard Commands for Programmable Instruments (SCPI) Consortium’s SCPI standard.
Generally, these commands are sent as one or more ASCII characters that tell the device to perform
a particular operation, such as setting a range or closing a relay. The IEEE-488 bus treats these
commands as data because ATN is false when the commands are transmitted.

Keithley 6517B Specifications

General

Input Impedance	>200 TΩ
Electrometer Type	Electrometer/High Resistance Meter
Current Measurement Range	20 fA to 20 mA
Display	Vacuum Fluorescent Display
Communication Interfaces	IEEE-488 (GPIB), RS-232
Power Supply	100 V / 120 V / 220 V / 240 V; 50 Hz / 60 Hz
Resistance Measurement Range	Up to 200 TΩ