10
OMICRON Lab
B-WIC & B-SMC User Manual
4.5
Connecting the DUT
Please follow the rules outlined in this section to ensure best measurement accuracy using
B
‑
WIC and
B
‑
SMC
4.5.1
Avoid Leads and Large DUTs
Do not use extra leads to connect the DUT to the
B
‑
WIC and B
‑
SMC
test fixtures. Extra leads will
introduce stray capacitance to ground / housing. This can cause currents to bypass the internal
measurement bridge, causing errors in the measurement. The same is true for physically large DUTs.
Figure 4-4: Stray capacitance of leads and physically large DUTs
4.5.2
Electrode Dimensions
The following pictures show the geometry of the
B
‑
WIC and B
‑
SMC
electrodes.
Maximum DUT wire diameter is 1.8 mm.
Minimum spacing of DUT wires (clearance) is
3 mm. The electrode length is 24 mm.
Maximum DUT size that can be placed in the
B-SMC is of 9.5 mm length and 7.5 mm width.
Note that the needle electrode is in the center.
Figure 4-5: Electrode geometry of
B
‑
WIC and B
‑
SMC
