User Manual

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 digi-
tal output and contact check. Refer to “Binning systems,” page 12-10, for a
description of binning and to “Front panel output configuration,” page 13-7, for
details on source auto off functionality.
When performing a source memory sweep with the SourceMeter, contact check is
performed before each point in that sweep only when 4-wire remote sensing is
enabled. To save test cycle time, the contact check is performed before the mem-
ory 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 maintain 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 particu-
lar location, 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