Keithley 4200-SCS - FORCE Terminal; Ground Unit Terminals and Connectors

1-34 Return to Section Topics 4200-900-01 Rev. K / February 2017
Section 1: Getting Started Model 4200-SCS User’s Manual
Figure 1-29
Full-Kelvin preamp/ground unit connections
Ground unit terminals and connectors
The locations and configuration of the GNDU terminals are shown in Figure 1-26. Basic
information about these connectors is summarized below. For more information about ground unit
signal connections, refer to the Reference Manual, Basic source-measure connections, page 4-3.
CAUTION The maximum allowed voltage between circuit COMMON and chassis
ground is ±32 V DC.
FORCE terminal
The FORCE terminal is a standard triaxial connector used as a return path for the SMU or preamp
FORCE current.
• The center pin is FORCE
• The inner shield is GUARD
• The outer shield is circuit COMMON
NOTE The ground unit FORCE and GUARD signal terminals are connected to circuit
COMMON.
4200-SMU
or
4210-SMU
GNDU
SENSE LO
FORCE
SENSE
FORCE
SENSE
4200-PA
FORCE
SENSE
DUT
Note: Not used when
PreAmp is attached.