Module 8
Capacitance Measurement
8-17
SCUU Output: Force1/CMUH
Force2/CMUL
Triaxial Cable
Manipulator/Positioner
GSWU
CV
IV
Guard
Force
Guard
Force
GSWU Control Cable
Hcur/Hpot
CMU
SMU N+1
SMU N
IV
CV
IV
CV
N: SMU number, Integer.
Lcur/Lpot
Switches CV/IV
CV: thru
IV: open
Clip wire
Clip wire
Switches CV/IV
B1500A with SCUU
GSWU
Simple direct connection between SMU/CMU and
manipulator/positioner
GSWU Connection Example
1. Place the GSWU at the appropriate location near the manipulators/positioners.
2. Connect the GSWU control cable between the GSWU and the SCUU.
3. Connect a clip wire between the GSWU and the outer conductor of the manipulator/positioner
connected to Force1/CMUH.
4. Connect a clip wire the GSWU and the outer conductor of the manipulator/positioner connected to
Force2/CMUL.
When the SMU paths (IV) are available for the manipulators/positioners, the GSWU opens between
the outer conductors. However, when the CMU paths (CV) are available, the GSWU connects them
together to make the return path of measurement current.
By using the EasyEXPERT software, cable length between the CMU and the SCUU is automatically
detected, and the GSWU switch control is automatically performed. Also, capacitance error
compensation is also automatically performed if the compensation data are available.
Note:
When the SMU paths are available for the manipulators/positioners, the connection between the
outer conductors must be broken because they are connected to the SMU guard terminals separately
and the guard terminals must be disconnected from anything at the end of the extension.
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