F-10 Contact Check Function 2400 Series SourceMeter
®
User’s Manual
Binning failure indications (grading mode)
As previously discussed, it is possible to place a fail pattern on the Digital I/O Port when
contact check fails. It is important to note that, depending on whether source auto clear is
enabled and when the bin control is done, certain issues arise when running a test with a
normal voltage or current sweep and a source memory sweep. Four possible effects on
sweep operation may occur when using the digital output and contact check. Refer to
“Binning systems,” page 12-11, for a description of binning and to “Front panel output
configuration,” page 13-7, for details on source auto off functionality.
When performing a sweep with the SourceMeter, contact check is performed before each
point in that sweep. To save test cycle time, the contact check is performed before the
memory location for the sweep point is recalled. If there is a failure in any of the four
modes below, the sweep memory location containing the open lead will not be recalled
from the memory.
Auto clear on, end binning
Source auto clear on: :SOUR:CLE:AUTO ON
Bin control at end of sweep: :CALC2:CLIM:BCON END
If a point in a sweep operation fails contact check, the output is turned off and will remain
off until the end of the sweep points. The triggers will be supplied and accepted to main-
tain timing. The memory for each of the points after the failure will not be recalled, and no
further contact checks will be performed until the end of the sweep points. If the sweep is
to be repeated, the new sweep will start with a contact check, and normal measurement
operation will resume.
Auto clear on, immediate binning
Bin control at end of each point sweep: :CALC2:CLLM:BCON IMM
If contact check detects an open lead, the output is not turned on for that particular loca-
tion, and that sweep point is not recalled and will be skipped. The sweep proceeds to the
next sweep point, and a contact check test is performed.
Auto clear off, end binning
Source auto clear off: :SOUR:CLE:AUTO OFF
Bin control occurring at end of sweep: :CALC2:CLIM:BCON END
The output is kept on throughout the entire sweep. If an open lead is found during the
sweep, the output is turned off, no more contacts are checked, sweep memory locations
are not recalled, and triggers are maintained until the last sweep point. If multiples of the
same sweep are desired, the following sweep after the open lead will start with a contact
check for each sweep point and normal measurement operation if no other failures occur.
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