User manual

2400 Series SourceMeter
®
User’s Manual SCPI Command Reference 18-105
Description This command is used to enable or disable remote sensing. When
using remote sensing, 4-wire connections to the DUT are required.
Sourcing voltage — With remote sensing enabled, the output volt-
age is sensed (measured) at the DUT. If the sensed voltage is lower
than the programmed amplitude, then the V-Source increases the
voltage until the sensed voltage is the same as the programmed
amplitude. This compensates for IR drop in the OUTPUT test leads.
With remote sensing disabled, the output voltage is sensed at the
output connectors.
Measuring voltage — With remote sensing enabled, voltage mea-
surements are made at DUT. This eliminates any voltage drops that
may be in the test leads between the SourceMeter and the DUT.
With remote sensing disabled, voltage measurements are performed
at the output connectors of the instrument.
Measuring resistance — With remote sensing enabled, 4-wire
resistance measurements can be made.
NOTE See Section 2 for details on sensing.
Select guard mode
GUARd <name>
:SYSTem:GUARd <name> Select guard mode
Parameters <name> = OHMS Ohms guard mode
CABLe Cable guard mode
Query :GUARd? Query guard mode
Description This command is used to select the guard mode. OHMS guard is a
low-impedance guard drive used for in-circuit resistance
measurements. Ohms guard is not available for SourceMeters that
have 1A, 3A and/or 10A ranges (source or measure). CABLE guard
provides a high-impedance guard drive that is used to eliminate
leakage currents in cabling and test fixtures.
When performing 6-wire ohms guard measurements, use the
GUARD out-put state. The OUTPut [1]:SMODe GUARd command is
used to select the GUARD output-off state.
NOTE See Section 2 for details on guarding.