Keithley 6485, User Manual

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1-8 Getting Started Model 6485 and 6487 User’s Manual
Features
The Model 6485/6487 is a high-performance picoammeter capable of measuring current
(the Model 6487 also measures resistance).
Section 2 contains details on its measurement
capabilities ( “Connection fundamentals,” page 2-2 ). Features of Model 6485/6487
Picoammeter include:
• Setup storage — Five instrument setups (three user, GPIB defaults, and factory
defaults) can be saved and recalled.
• mX+b, m/X+b (reciprocal—for resistance calculations), and log10 — These
calculations provide mathematical manipulation of readings ( Section 5 ).
• Relative — Null offsets or establish baseline values ( Section 5 ).
• Buffer — Store data in the internal buffer ( Section 6 ).
• Limits — Set up to two stages of high and low reading limits to test devices (see
Section 8 of the Model 6485 Instruction Manual or Model 6487 Reference Manual).
• Digital I/O port (Model 6487 only) — Four output lines and one input line to con-
trol external circuitry as an interface between limit tests and component handler.
(See Section 8 of the Model 6487 Reference Manual.)
• Remote interface — Model 6485/6487 can be controlled using the IEEE-488
interface (GPIB) or the RS-232 interface ( Section 7 ).
• Voltage source (Model 6487 only) — Internal ±500V voltage source is also used
for ohms function ( Section 3 ).
• GPIB programming language — When using the GPIB, the instrument can be
programmed using the SCPI or DDC programming language.
Model 6485 front and rear panel familiarization
Model 6485 front panel summary
The front panel of Model 6485 is shown in Figure 1-1 .