Keithley 6485 User Manual

Model 6485 Picoammeter Instruction Manual Getting Started 1-19
Optional command words
In order to be in conformance with the IEEE-488.2 standard, Model 6485 accepts optional
command words. Any command word that is enclosed in brackets ([]) is optional and does
not have to be included in the program message.
Query commands
Most command words have a query form. A query command is identified by the question
mark (?) that follows the command word. A query command requests (queries) the pro-
grammed status of that command. When a query command is sent and Model 6485 is
addressed to talk, the response message is sent to the computer.

Keithley 6485 Specifications

General

Model	Keithley 6485
Category	Picoammeter
Input Impedance	>10^14 Ohms
Voltage Burden	<200µV
Accuracy	0.4% of reading
Voltage Source Range	Not Applicable
Voltage Source Resolution	Not Applicable
Voltage Source Accuracy	Not Applicable
Interface	IEEE-488
Power Requirements	100V to 240V AC, 50/60Hz
Dimensions	89 mm high x 214 mm wide x 369 mm deep (3.5 in x 8.4 in x 14.5 in)