Select Guard Mode - Keithley SourceMeter 2400 User Manual

18-108 SCPI Command Reference

Select guard mode

GUARd <name>
:SYSTem:GUARd <name>
Parameters <name> =
Query :GUARd?
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
Initialize memory
INITialize
:SYSTem:MEMory:INITialize
Description When this command is used, the following actions to initialize battery
backed RAM occur:
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2400 Series SourceMeter
Select guard mode
OHMS Ohms guard mode
CABLe Cable guard mode
Query guard mode
for details on guarding.
Initializes battery backed RAM
• TRACe (data store) data is lost, buffer size is reset to 100, and
timestamp is set to the absolute format.
• SOURce1:LIST:CURR and VOLT are reset to 0A and 0V,
respectively.
• Deletes all user-defined math expressions. (See "CALCulate[1]"
subsystem.)
• All 100 memory locations for a memory sweep are initialized to the
present setup configuration of the SourceMeter with CALC 1 dis-
abled. User-defined math expressions are replaced with the
"Power" math expression.
• The four standard save setups (*SAV0 - *SAV4) are initialized to
the present setup configuration of the SourceMeter.
• All CALCulate1 user-defined math expressions are deleted.
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User's Manual