Keithley 6487 Reference Manual

Model 6487 Reference Manual Remote Operation 9-5
To allow many parallel connections to one instrument, stack the connector. Two screws are
located on each connector to ensure that connections remain secure. Current standards call
for metric threads, which are identified with dark-colored screws. Earlier versions had dif-
ferent screws, which were silver-colored. Do not use these types of connectors on the
Model 6487, because it is designed for metric threads.
Figure 9-2 shows a typical connecting scheme for a multi-unit test system.
Figure 9-2
Multi-unit connections
To avoid possible mechanical damage, stack no more than three connectors on any one
unit.
klqb To minimize interference caused by electromagnetic radiation, use only shielded
IEEE-488 cables. Available shielded cables from Keithley are Models 7007-1
and 7007-2.
Instrument
Controller
Instrument Instrument

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%