1-6 Getting Started Model 6485 Picoammeter Instruction Manual
Additional references
While reading this document, you may find it helpful to consult the following documenta-
tion for reference:
Low Level Measurements handbook — Keithley’s guide for effective low current, low
voltage, and high impedance measurements.
Features
The Model 6485 is a high-performance picoammeter capable of measuring current.
Section 2 contains details on its measurement capabilities (“Measurement overview,” page
4-2). Features of Model 6485 Picoammeter include:
Setup storage — Five instrument setups (three user, GPIB defaults, and factory defaults)
can be saved and recalled. See “Front panel setup operation,” page 1-15.
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 up to 2500 readings in the internal buffer (Section 6).
Limits — Set up to two stages of high and low reading limits to test devices (Section 8).
Remote interface — Model 6485 can be controlled using the IEEE-488 interface (GPIB)
or the RS-232 interface (Section 9).
GPIB programming language — When using the GPIB, the instrument can be pro-
grammed using the SCPI or DDC programming language (Section 9).
Front and rear panel familiarization
Front panel summary
The front panel of Model 6485 is shown in Figure 1-1.
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