Appendix A: Non-Kelvin (2W) S530 system diagnostics
S530
Diagnostic Manual
Figure 21: Test flow chart
NOTE
For the Model 2410 SMU in the S530 high-voltage system, the 1000V is tested using voltages that
are less than 200V since the Series 2600A SMUs are used as test support SMUs. The Model 2410 is
tested in a manner that is similar to the Series 2600A SMUs.
SMU test flow
To confirm both force and sense terminals are working, the non-Kelvin SMU diagnostic test is
performed in two parts: force and sense tests. The test flow is similar to the Kelvin SMU test.
Short the Hi terminals of these two SMUs using the switch matrix (all Lo terminals of the SMUs
should already be connected using the S530 system Lo Patch Panel.)
To perform the voltage test, diagnostics forces 0A from the test support SMU first, and then
forces voltage from the SMU under test.
To perform the current test, diagnostics forces 0V from the support SMU first, and then forces
current from the SMU under test.
The voltage or current is measured by both SMUs and compared to the diagnostic limits.
For each range, four voltage values are forced: ±0.1 × full range value and ±0.9 × full range value
(except in the case of the Model 2410 SMU). Both SMUs measure these four readings using a
fixed measurement range (current test range) for source and measurement. The results are
compared to the nominal values. If one of the measured values is beyond the limits as defined in
the diagSpec.py file, the result of this range for the SMU will indicate a Fail.
SMU connections
Using switch matrix rows that are appropriate for the instruments and the tested ranges, the SMU
under test and the test support SMU are connected together. The specific switch matrix rows that are
required for tests are defined in the diagSpec.py file in the following folder directory (see next Figure):
C:\ACS\library\pyLibrary\ptmlpt
2-4
S530-906-01 Rev. A / March 2011
