Keithley 2601 Reference Manual

2600S-901-01 Rev. C / January 2008 Return to Section Topics 3-5
Series 2600 System SourceMeter® Instruments Reference Manual Section 3: DUT Test Connections
Figure 3-4
Model 2602/2612
FVR
Chassis
Series 2600
Signal
Ground
Chassis
Signal Ground is a local signal ground and defined as
the Low-Noise Chassis Ground Banana Jack.
Chassis is defined as the metal chassis of the Series 2600.
1) Frequency Variable Resistor (FVR)  Isolates
the SMUs from high frequencies on the chassis.
For DC to 60Hz, the FVR is a virtual short (zero
ohms).
2) DO NOT use the Chassis Screw terminal to
make signal connections to external circuitry.
High frequency (>1MHz) on the chassis may
result in higher noise at the output.
Chassis Screw terminal is connected to the metal chassis of the
Series 2600.
1
Chassis
Screw
2
Low-Noise
Chassis Ground
Banana Jack
Signal
Ground
Model 2636
Channel A LO
Channel B LO
Floating
Floating
Channel B LO
Channel A LO
GND
GND
Chassis GND
FVR
1
Low-Noise Chassis Ground Banana Jack and Chassis Screw
WARNING When connecting to the model 2611, 2612, 2635 and 2636 SMU
outputs, with cables not rated for voltages above 42V, such as the
2600-ALG-2, you must disable the high voltage output by using the
INTERLOCK function as defined in section 10 of this manual.
Leaving the high voltage enabled while not properly insulating the
external connections to the unit poses a shock hazard which could
cause serious injury to the user. It is also recommended that the
LO connection terminal not be allowed to float by connecting it to
signal ground or another known signal reference.
Sensing methods
Source-measure operations are performed using either 2-wire local sense connections or 4-wire
remote sense connections.
NOTE The default sense setting is 2-wire local. See "Sense mode selection"
later in this section to check and or change the sense mode.

Keithley 2601 Specifications

General

Brand	Keithley
Model	2601
Category	Measuring Instruments
Language	English