6.7.10 Counting accuracy
In the setting mode, you can influence the counting accuracy of your scale in the Program settings /
Counting.
> Standard reference sample quantity
The reference sample quantity is set to 10 at the factory.
You can set this quantity between 1 and 99.
For small parts, it makes sense to use a larger number of parts for reference weight determination.
> Minimum reference weight
The counting scale checks whether the total weight of the reference parts falls below a minimum
reference weight. The calculation is based on the smallest digit of the scale multiplied by a value
stored in the setting mode. The factory setting is a factor of 10, i.e. 10 digits. Values between 1 and
50 are possible.
If the minimum reference weight is not reached or if the calculated reference weight is smaller than
the numeric increment of the scale (in the case of multiple-range scales, the smallest numeric
increment), the quantity determined is indicated in the display by an asterisk to inform the user.
If a reference sample falls below 10% of the smallest numeric increment of the connected scale,
the reference weight cannot be determined for this sample; "Error 04 Reference weight too small"
appears in the display. These parts should be counted using a scale with a smaller numeric
increment.
Example of a scale with 1 g digits:
The factory setting is 10 d = 10 g for the total weight of the reference parts.
If you reduce the factory setting to 5 d, the scale will accept 5 g as the minimum weight for the total
weight of the reference parts. If you increase the factory setting to 20 d, the scale will assume a
minimum weight of 20 g for the total weight of the reference parts.
> Optimization Ref. (reference weight optimization)
The reference weight of a batch, determined by the reference weight calculation from e.g. 10 or 20
parts, is usually not the "real average weight" of a part from the entire batch. The lightest and heaviest
parts are always somewhere in a batch. The difference between the two parts is the manufacturing
tolerance, which influences the counting accuracy.
The determination of the reference weight at the beginning of a counting process, e.g. from 10 or 20
parts, is carried out from a "randomly" taken number of parts, which naturally differ from the "real
average weight" (reference weight). Therefore, it would be desirable for the accuracy of the counting
results if the reference weight could be determined not only once at the beginning of the counting
process, but often during the current counting process, from an ever-increasing number of parts.
The solution to this problem is reference weight optimization.
After the reference weight has been determined using a reference quantity, for example 10 or 20
parts, the reference quantity (first quantity) appears in the display. Further parts are now placed on
the display. When the scale has stabilized, a new reference weight is determined with the quantity
shown in the display and a new, "more average reference weight" is determined. You can repeat this
procedure as often as you like as long as the following rule is observed:
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