Sequential Bins With a Single Nominal Value
Suppose that the batch of nominally 100 Ω resistors is to be sorted according to tolerance, as in the
first example, but with the ability to distinguish between the low and high values. Then the bins can be
set up to have the same nominal values, with each bin having asymmetric limits that are expressed as
a percentage of the nominal value:
Bin 0: 95 Ω < R < 97 Ω (−5%, −3%)
Bin 1: 97 Ω < R < 99 Ω (−3%, −1%)
Bin 2: 99 Ω < R < 101 Ω (−1%, +1%)
Bin 3: 101 Ω < R < 103 Ω (+1%, +3%)
Bin 4: 103 Ω < R < 105 Ω (+3%, +5%)
Bin 8: QDR failure (if Q is too high)
Bin 9: General failure bin (parts not falling into any other bin)
Figure 4-3 illustrates this example of sequential bins with different nominal values.
Bin 0 Bin 1
Bin 2 Bin 3 Bin 4
... ...
−5% −3% −1% +1% +3% +5%
Nominal value
Figure 4-3 - Example of Sequential Bins With a Single Nominal Value
General Procedures
Binning data can be entered manually using the BIN#, NOM, and LIM keys, or over the RS232 or
optional GPIB interface.
A bin is defined by a bin number, with a nominal value and upper and lower limits (in per cent). If
a nominal value is not entered for a bin, it will take the nominal value of the next lower bin. Bin 0 is the
exception; if bin 0 does not have a nominal value and limits, all parts will fail. Parts that fall into more
than one bin are assigned to the lower numbered bin. Thus, the tightest tolerance should be assigned
to the lowest bin number. Any parts that fall into gaps between bins are assigned to the general
failure bin (Bin 9). If only one limit of a pair is entered, the limits will be assumed to be a a symmetric
pair (± X%, where “X” is the entered limit value). Unused bins should be closed (assigned 0% limits).
After bin clear or RCL 0, all bins are closed.
Parts that would fall into both the general failure bin (Bin 9) and the QDR failure bin (Bin 8) are
assigned to the QDR fail bin only. The QDR limits are maximums depending on which parameter is
being measured. If a Q value is negative, (for a resistor) the absolute value should be entered, and
the meter performs a comparison between the absolute value of the QDR reading and the QDR limit.
There are no limits for the QDR bin, only a nominal value. To disable the QDR comparison, set the
nominal value to its extreme value, as listed in Table 4-1.
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