User`s guide

3- 46 Keysight B1500A User’s Guide, Edition 14
Installation
Connecting Measurement Devices
Using Connector Plate
This section provides the information useful for connecting cables and probing
needles to a connector plate.
• “To Reduce Leakage Current”
• “To Measure Low Resistance”
To Reduce Leakage Current
To reduce the leakage current caused by connection cables, the guard technique is
effective. Connect the probing needles to the terminals of the connector plate by
using coaxial cables as shown below:
1. At end of cable, connect coaxial center conductor to force terminal of connector
plate, and connect coaxial outer conductor to guard terminal of connector plate.
2. At another end, connect coaxial center conductor to tail of the probing needle.
Never connect the outer conductor at this cable end.
Extend the outer conductor as close as possible to the probing needle.
Example
The following example connection can be used to reduce the leakage current.
Extend the outer conductor as close as possible to the probing needle. This also
reduces the induced noise.
WARNING For safety, prepare and attach a shield cover to the connector plate to avoid
touching the joints on the wiring side of connectors. And ground the cover.
Wrap an insulator around the naked conductors of coaxial cable to avoid
touching it.
Probing needle
Contact pad
Connector plate
Outer conductor
Center conductor
Coaxial cable