User manual

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 calcu-
lations 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 inter-
face (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 pro-
grammed 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.