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Introduction to Counting Scales

January 22, 2021

Introduction to Counting Scales

Counting scale is a multi-function weighing machine, which can be used to count and weigh objects at the same time. Typical applications include checkweight, which is used to check the weight of an object against a preset limit to perform an accurate part counting procedure to reduce manual counting. Counting scales are available in a variety of sizes and can be used separately on a workbench or on the floor. Ideal for quality control centers, retail warehouses, production facilities and factory environments.

How does the counting scale work?

Counting scales, as suggested, can be used not only to weigh but also to count many pieces. It is achieved by using the sample weight (the first piece weight or the weight you entered via the keyboard) and dividing the total weight by the sample weight. Don't forget that the scale is calculated by dividing the total weight by the sample weight. Therefore, you cannot place different weights of screws and bolts to get the correct results. It only applies to all items of the same weight.

What's the use of counting scales?

Counting scales are particularly common in quality assurance departments and retail distribution warehouses, where they are used to check the quantity of a batch of parts before approval for shipment. In addition, other manufacturing-based businesses, such as printers, CD manufacturers, metalworkers, and pipe supply companies, often use counting scales. Plumbing supply companies, for example, can count the number of copper fittings left in their boxes and update their hardware numbers without having to manually count each piece. They can also be useful for inventory, manufacturing and packaging. Not only do they allow you to check the number of pieces in a batch, but they also allow you to create approvals that always have the correct amount of material, and are great for counting large amounts of the same material. Counting scales can also count coins or tokens when closing stores or totaling amounts, and help reduce waste when filling packaging and containers. The main benefit of having a counting scale is that it saves time and money.

Difference between internal resolution and display resolution

Internal resolution and display resolution are often used when describing counting scales, but despite their similarities, they have very different meanings:

Resolution/display resolution

This is the smallest change in the result detected by the weighing instrument in the measured sample. Usually, this is called readability. In short, it is the smallest number that the scale's display can display. For example, if you are using a scale with a readability of only 0.1g, it will not show the weight of something that weighs 0.0052g. Display resolution is actually the ratio of capacity to readability.

Internal resolution

This refers to the total capacity of the scale can be divided into many pieces. It is the ratio of the capacity of the scale to the weight of the lightest part which it can count; Basically, a scale or balance has the ability to convert a physical signal from a sample mass into a digital output. The internal resolution is almost never the same as the display resolution, and most scales use a ratio between the two. If the ratio is 1:1, the reading is usually volatile because incremental changes are very easy. The balance is usually a 10:1 ratio, which is usually a scientific scale requiring great accuracy and is likely to be used under optimal conditions with minimal fluctuation in readings. Most scales that use the load cell have a 4:1 ratio to improve the stability of the readings. As always, there are other variables, such as temperature, that can affect the stability of the reading.


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