are now an essential and integral part of the stores and stockrooms of many
companies. Although their main use is for the stock checking of components and
finished goods they are also designed for specific uses such as bank note counting
and coin checking.
The operator places a known number of components on the scale which then calculates the average piece part weight and stores this in the memory. When a larger unknown quantity of components are placed on the scale, the electronics divides the total weight by the stored piece part weight to give the total number of components.
The counting accuracy of such a scale is directly proportional to:
1. The uniformity of the individual components.
2. The size of the initial sample (the larger the quantity, the more representative the individual piece weight will be).
Counting scales need high internal resolution, good linearity and good repeatability.
Counting scales may have two weigh pans -a low range one for sample weighing and small quantity counting and higher range one for large quantities.In addition the design of low capacity counting scales may have the facility to link them to larger platforms
Modern counting scales can be linked directly to stock control systems and incorporate bar coding facilities to quickly identify products without the need to sample weigh.