QuadTech 1865 Instruction Manual page 31

Figures 2-2 through 2-4 illustrate various methods of connection to the device under test
(DUT). Figure 2-2 illustrates the two-wire connection to DUT.
ungrounded connection is the recommended connection of ungrounded components or
components that can be connected very close to the 1865 input terminals rather than
through the lead set provided.
Figure 2-2: Two-Wire Ungrounded Connection
The two-wire grounded measurement is a common type of connection to be used on the
1865. This is the recommended connection on grounded components or components that
are some physical distance from the input terminals of the unit. A grounded component
is one in which one of its connections goes to an earth ground, whereas on an
ungrounded component neither connection goes to earth ground. A component being
measured with a lead set is considered to be a physical distance away from the terminals
and thus the two-wire grounded connection is often recommended.
Figure 2-3: Two-Wire
Operation
High
DUT
+
Unknown Unknown
GND
(+) Unknown and (-) Unknown connected to DUT
GUARD shorted to GND (optional)
High
DUT
Unknow
+
Unknown
n
GND
(+) Unknown and (-) Unknown connected to DUT
(+) Unknown connected to GND
Grounded
Low
-
GRD
Low
-
GRD
Connection
The two-wire
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