Model 2657A High Power System SourceMeter® Instrument Reference Manual Section 2: General operation
2657A-901-01 Rev. B/December 2012 2-45
Item Description Notes
(1) Outer jacket
(2) Outer shield
(3) Inner shield Spacing between the inner shield and any user
accessible circuit: 33.5 mm; spacing between the inner
shield and a metal enclosure (if used): 16.75 mm
(4) Center conductor Spacing between the center conductor and any user
accessible circuit: 33.5 mm; spacing between the center
conductor and a metal enclosure (if used): 16.75 mm
(5) First dielectric
(6) Second dielectric
(7) Inner jacket With wrapped tape barrier. Minimum spacing between
inner and outer shield: 16.75 mm.
Keithley offers the following high-voltage triaxial accessories:
Model Description
HV-CA-554 High-voltage triaxial cable assembly (male to male)
SHV-CA-553 SHV to high-voltage triaxial cable assembly (male to male)
HV-CA-571-3 High-voltage triaxial female panel mount to unterminated cable assembly
(intended for use within a safe enclosure such as a test fixture)
HV-CS-1613 High-voltage triaxial feedthrough connector
2-wire local sensing connections
You can use 2-wire local sensing measurements, shown in the following figure, for the following
source-measure conditions:
• Sourcing and measuring current.
• Sourcing and measuring voltage in high impedance (more than 1 kΩ) test circuits.
When using 2-wire local sensing connections, make sure to properly configure the Model 2657A
Sense mode selection
(on page 2-64).
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