Apw Enhancement - Mettler Toledo xpress XTC Bedienungsanleitung

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STANDARD COUNTING SCALE

APW ENHANCEMENT

APW enhancement improves the accuracy of an APW. APW enhancement is based on the fact that an
inaccurate APW, while not able to accurately count large numbers of parts, will reliably count a small
number. This allows a determination of APW based on a larger weight. Given enough enhancements,
the APW becomes very accurate.
This function permits the operator to continuously update the APW based on larger and larger samples.
As additional pieces are placed on the scale, a new APW can be calculated based on the new total
sample weight and count.
The APW can be enhanced constantly up to 4% of the scale capacity. To ensure a minimum APW initial
accuracy, a sample weight of at least five display increments must be used. There is a selection in setup
mode which increases the minimum sample to 0.015%, 0.1% or 0.2% of capacity.
When using APW enhancement, you must not add more pieces to the scale than what can be counted
accurately using the current APW (about the same pieces, which have already been counted). If this
maximum is exceeded, a warning of [OVER] will be displayed for approximately two seconds then will
automatically clear. The operator can remove parts until [OVER] will not be displayed again.
If the operator ignores the [OVER] display and adds more pieces (or removes more in count-out sample
mode), no further APW enhancement will be done for the current transaction. If the proper procedure is
followed, the scale will continue to enhance the APW until 4% of the scale capacity is reached. Once the
counting weight reaches 4%, APW enhancement is discontinued.
Notice: The APW inputted via keyboard or recalled from an ID can not be enhanced.