Page 54 of 110
Operation/Programming
2.3.11 Bin Type
A group of similar components can be measured and categorized according to operator
programmed limits. For example, the 1910 can be used to sort a group of nominally-valued 100
k
resistors into assigned bins of 1%, 2%, 5%, etc., around a nominal value, or sorted by
absolute limits which are independent of any nominal value. The 1910 provides sorting
capability into 14 bins (10 pass and 4 fail). These are assigned as follows:
Bins 1 thru 10
Primary pass, secondary pass (if limit is entered)
Bin 11
Primary pass, secondary fail low
Bin 12
Primary pass, secondary fail high
Bin
13
Primary
fail,
secondary
pass
Bin
14
Primary
fail,
secondary
fail
If no limit is entered for the primary parameter but one is entered for the secondary, bin
assignment will be Bin 1 for a pass and Bin 11 for a fail low and Bin 12 for a fail high.
Bin limits for the primary parameter can be entered in terms of absolute value or as a percent
tolerance about a defined nominal. Two of the most common methods of sorting are
nested
limits and
sequential
limits. Nested limits are a natural choice for sorting by % tolerance around
a single nominal value with the lower numbered bins narrower than the higher numbered ones.
Nested limits for five bins are illustrated below, note that limits do not have to be symmetrical as
shown for bin 5, which is +20% and –30%. When entering limits in percent, both can be
positive, both can be negative, or one can be positive and one can be negative, but the Hi limit
must be more positive than the Lo limit.
Sequential limits are a natural choice for sorting by absolute value. Sequential limits for four
bins are illustrated below. It should be noted that the bins do not necessarily have to be adjacent.
Depending on the specified limits for each they can be overlapping, adjacent or even isolated
(gaps) from each other. Any overlap is assigned to the lower numbered bin and a gap would be
assigned to the overall fail bin.
1
%
-1%
Bin 1
-5% -2%
Bin 2
Bin 3
2%
Bin 4
Bin 5
-10%
5
%
10%
20%
-30%
100.00 k
Nominal Value
Fail
Bin
Fail
Bin
Summary of Contents for 1910
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Page 107: ...Theory Page 103 of 110 Figure 4 4 Detector Circuits Es IL Ex PL PH Voltage Current...
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