370A Operator’s Manual
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General Information Ć
Kelvin Sense
The 370A provides the adaptor connector equipped with Kelvin sense terminals.
The Kelvin sense is the way to measure voltage with two independent terminals
connecting to each of DUT leads; the Force terminal that supplies power and the
Sense terminal senses the voltage. By using the Kelvin sense mechanism, you
can make a high–precision measurement because that the effect of conductance
from the contact between the cables and DUT leads is suppressed to a minimum.
The Sense terminals in the 370A adaptor connector and the A1001 through
A1005 test adaptors are for Kelvin sensing. The measurement can be performed
without Sense terminals, however, if you need high–precision measurement, use
the those terminals.
Connections for Kelvin Sensing
When a DUT does not fit in any of the test adaptors and you prepare a specific
test adaptor, for example, use cables to connect terminals and DUT leads as
shown in Figure 1-0 for Kelvin sensing.
CAUTION. Confirm that the the DUT leads and the force terminals: C, B and E
are firmly connected. Making improper connections may cause the DUT to be
broken. Before a measurement, also verify that the cables are not down and the
contact between the terminals and cables are made properly.
To avoid electric shock and damage to the instrument, perform measurement
only within the protective cover. Do not disable the interlock mechanism and/or
do not take the cables out of the protective cover to perform measurement
without or outside the cover.
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