Figure 4-8. Guarding improves high value resistance measurement accuracy by reducing leakage errors.
4.4 Leakage Measurements (SMU2064)
The SMU2064 measures leakage currents by applying a DC voltage across the device under test, and
measuring the current through it. Three ranges are provided, 240nA, 2.4uA and 24uA. The voltage can be
set between -10V and +10V. See Figures 4-8 for connection. The DC voltage at which leakage is
measured is set using
DMMSetDCVSource()
. Leakage current is read using
DMMRead(),
DMMReadStr()
or
DMMReadNorm()
functions. Use
DMMReadTestV
to measure precisely the test
voltage being applied.
Signametrics
42
