
Section 5. Checkweighing
The 4200 provides a user-programmable Over and Under checkweigh tolerance feature.
The three checkweigh indicators, OVER, UNDER, and ACCEPT, can be used to provide a
fast and easily understood indication of an overweight, underweight, or in-tolerance weight
condition.
The three checkweigh indicators can be programmed for zero or net checkweighing
(described below), to operate only on gross or net weights, to operate on stable weights
only, to operate on weights above 1% of scale capacity, to operate on a combination of the
above, or to be disabled totally. See the "Checkweigh Operation (C.O.)" setup parameter
for details.
The OVER, UNDER and ACCEPT indicators can be used with or without the digital
weight display. Either can be turned off for maximum flexibility of the 4200 scale display.
See "Checkweigh Operation (C.O.)" and "Display Operation (doP)" setup parameters.
NET AND ZERO CHECKWEIGHING
The Model 4200 can be used for net or zero checkweighing applications. While both net
and zero checkweighing are used for the same purpose, to check for proper package or
item weight, the difference is in the weight that is displayed.
In net checkweighing, the scale is zeroed with the platter empty, and the actual item weight
is displayed. The over and under values will be set to the actual over and under weights.
In zero checkweighing, a weight that represents the ideal weight for an item is placed on
the scale, and then zeroed. Subsequent items being checked for proper weight will
display zero if the weight is exactly right, or the over or under weight if the item is not exactly
right.
As an example of the two methods, consider a box of produce whose net weight should be
exactly 5 lb, but will be considered acceptable if it varies by no more than 0.25 lb above or
below 5 lb.
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