Keithley 6487 Reference Manual

5
Relative, mX+b, m/X+b, and log
• Relative — Explains how to null an offset or establish a baseline value. Includes
the SCPI commands for remote operation.
• mX+b, m/X+b (reciprocal), and logarithmic — Covers these three basic math
operations and includes the SCPI commands for remote operation.

Keithley 6487 Specifications

General

Type	Picoammeter/Voltage Source
Current Measurement Range	20 fA to 20 mA
Interfaces	GPIB, RS-232
Voltage Burden	< 200 µV
Input Impedance	>10^14 Ω
Power	100 V / 120 V / 220 V / 240 V
Basic Current Measurement Accuracy	0.4%