Over/Under Checkweighing
This program is used to check whether products are within a specific tolerance
range, to sort and classify items, and to fill and batch products. Symbols are
displayed above the bar graph as visual aids for this type of program: the equal
sign indicates the target weight; the minus sign, the underweight limit; and the plus
sign, the overweight limit. Within the tolerance range, the response sensitivity of the
bar graph is increased. You can define the tolerance limits between 0.1% and 10%
as required. To find these setting options, see the chart on page 4–12. The factory
setting is for tolerance limits of +/– 1.0%.
For checkweighing, you can choose between two programs:
– checking net weights (code 2 2 3)
– checking variations in weight (code 2 2 4)
These programs enable you to checkweigh in any range that can be selected using
the toggle key labeled
w
. Instead of weights, you can use piece counts or
percentages for checkweighing if you have selected the corresponding application
program by menu code. Both programs provide four control lines via the balance
interface, which are called data output port lines. This means you can interface
a remote display unit that has color-coded indicators, which are activated by the
lines depending on the target weight and the tolerance limits selected.
For more information, see the “Interface Description” in Part 5.
You can use the Sartorius Three-Segment
Checkweighing Display Unit, model YRD10Z,
as a visual aid during checkweighing.
4–9
Lower
tolerance
limit
Target weight
(100%)
Upper
tolerance
limit
Under
Over
