Keysight Technologies B1505A Configuration Manual page 117

WARNING
Make sure that the cover is closed properly before starting measurement. Do not
perform the measurement when a wire is protruding from the fixture cover.
Figure 3-2 N1265A Output Terminals
SMU Terminals
Output terminals internally connected to the SMU input connectors on the rear panel.
Force, Sense, and Guard terminals for HP/MPSMU. High Force, Low Force, High Sense,
and Low Sense for HC/MC/DHCSMU. See
For using HP/MPSMU, Force must be connected to a terminal of a DUT. And Guard must
be opened. You may extend it as close as possible to the DUT terminal for reducing the
leakage current of the extension cable. Also, Force and Sense should be connected together
at the device end for making the Kelvin connection effective for low resistance and high
current measurements.
For using HC/MC/DHCSMU, High Force and High Sense must be connected together at
the high terminal of a DUT. And Low Force and Low Sense must be connected together at
the low terminal of the DUT. Also, Selector Output Low Force and Sense must be
connected to the low terminal for connecting GNDU.
Use a MCSMU for the gate or base terminal of active device measurement using UHVU.
Then attach the N1265A-040 protection adapter on the SMU terminals used for the
MCSMU. This adapter is designed for protecting the MCSMU from ultra high voltage.
Also see
NOTE
Kelvin connection and non-Kelvin connection
If you want to simplify the connections, open the Sense terminals and use the Force
terminals only. This is the non-Kelvin connection. The Force terminals can be used to
apply and measure dc voltage or current. Note that the non-Kelvin connection is not
available for GNDU and MCSMU/HCSMU/DHCSMU.
If you perform the low resistance measurement or the high current measurement, use the
Kelvin connection which can reduce the residual resistance effects of the cables and
contacts by connecting the Force and Sense lines together as close as possible to the DUT
terminal. The Kelvin connection can be made on the test fixture as shown in
Keysight B1505A Configuration and Connection Guide
SMU
± 200 V Max 1 A
1
Force Sense
Force Force Force
High
Guard Guard Guard
Low
Gate
±40 V Max 1 A Pulse
Force
High High
Low Low
"Protection Adapter (N1265A-040)" on page
SMU
±200 V Max 2 A dc 40 A Pulse
2 3
Force Sense Force
Force Force
Guard Guard
Selector Output Bias Tee
±3 kV Max ±3 kV Max
Sense Guard
High
1
±3 V Max
K Thermocouple
Table 3-6.
3-25.
N1265A Connection Guide
Output Connection
Sense
Force
High
Guard
Low
UHV
±10 kV Max
Low
High
Low
2
Figure 3-3.
3-11