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Chapter 6 How to use the Multi-functions
35
6-4.
Ranking combination function
(Note) While the
Pre-combination Ranking mode and
Combination Weighing mode are available for the
Ranking combination function, you cannot use the weighing results obtained in the Pre-combination Ranking
mode for transactions or certifications stipulated by the Measurement Act. You can use the weighing results
obtained in the Combination Weighing mode for transactions or certifications stipulated by the Measurement
Act.
* When "NOT LEGAL" is displayed in the lower left of the display, you
cannot use the results for transactions or certifications stipulated by the
Measurement Act.
Ranking combination function
Application
This function is used to reduce variations in the weight of packs prepared by Fixed weight
packing work.
Weighing
method
Pre-combination Ranking: The system
shows the rank of items based on the
weight range setting for each rank.
Combination weight measurement:
Ranked items are combined to determine,
by the instrument, whether the combined
weight fall within the allowable range.
Advantage
By combining ranked and sorted items, you can pack a set of allowable weight items more
easily.
Setting values
• Weight measurement of at least 10 samples
• Number of items to be combined in a pack
• Number of ranks for sorting
Indication on
Main-display
Rank number
Measured weight
Indication on
Sub-display
Measured weight of the selected item
Quantity of combined items
Max number of
program entries
Up to 20 programs
The Ranking Combination function automatically determines the optimum weight ranges for each rank, based
on the specified number of ranks and the measurement results of samples.
• Setting the number of ranks to a larger value leads to a better combination accuracy, a higher yield rate, and
smaller variations. (You can set 3 to 9 ranks.)
• You can use the Ranking Combination function under the condition that items are normally distributed. Note
that you may not obtain the correct weight measurement values depending on a biased average value of the
unit weight, the variations in the unit weight, or the settings of the upper and lower limits.
Ranking combination function - How to register/edit the numbers through regular setup
[Example] To select the program number 5 and set the quantity of combined items (the number of items in one
pack) to 3 and set the number of ranks to 6
Operation
Display
Before registering program data, set the user parameter #01 to
5
on the
user parameter setting screen. * For how to set a user parameter, refer to
[Section 4-3].
Turn on the power, and then press
.
"rnk" appears, and the last two digits are a program number.
* Pressing
on the right screen returns to the previous weighing
screen.
* If the indicated program contains registered data, the blue lamp comes
on.
Each item of adjacent ranks is combined to
get allowable weight.
* The illustration indicates
the Subtractive type Pre-
combination Ranking.