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3.
Use the scroll wheel to set MAX HOLD.
MAX HOLD OFF, ON
4.
Press the EDIT/SAVE key to save and
exit the MANU Utility menu.
EDIT/SAVE
Note
The ESC key can be pressed at any time in the MANU
Utility menu to cancel and exit.
2.3.15 Setting the Grounding Mode
Background
When GROUND MODE is set to ON, the STW-9000
grounds the return terminal to the ground. This mode is
best for DUTs that are grounded to an earth ground by
their chassis, fixtures or operation environment. This
mode measures the potential of the HIGH VOLTAGE
terminal with respect to earth ground. This means that any
stray capacitance/resistance that leaks to earth ground
will also be measured. This is the safest testing mode,
though potentially not as accurate.
When GROUND MODE is set to OFF, the return terminal
is floating with respect to the earth ground. This mode is
for DUT that are floating and not directly connected to an
earth ground. This is more accurate than when GROUND
MODE is set to ON as any stray capacitance/resistance
that leaks to the earth ground from the DUT side of the
testing circuit will not be measured. For this reason, this
testing mode is able to measure to a higher resolution.
The GROUND MODE is always set to OFF for IR and GB
tests.
GROUND MODE = ON, DUT grounded
High Voltage
terminal
Return terminal
DUT
stray
resistance,
capacitance