Keithley 6487 Reference Manual

2-2 Measurement Concepts and Connections Model 6487 Reference Manual
Connection fundamentals
The following provides important fundamental information on input connections to the
Model 6487. Typical connection drawings are provided in “Basic connections to DUT,”
page 2-4. More detailed connections for specific measurements are in Section 3.
Input connector
The rear panel INPUT connector is a 3-lug female triax connector (Figure 2-1). Make con-
nections using a male terminated triax cable (“Low-noise input cables,” page 2-3.)
Figure 2-1
Triax input connector
Voltage source output connectors
The rear panel V-SOURCE OUTPUT HI and LO connectors (see Figure 1-1 in Section 1)
are used to connect the voltage source to the DUT. The voltage source is primarily used for
ohms measurements but can also be used for stand-alone source operation. See “Ohms
measurement connections,” page 2-5 and “Voltage source connections,” page 2-6 for
details.
Input Low
CAT I
Chassis Ground
Input High

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%