Crane scale Wiki
In our small crane scales glossary, we would like to briefly and concisely explain the most important terms of weighing technology.
According to DIN 1319–1: 1995, adjustment is defined as the setting up or the comparison of a measuring device to eliminate systematic deviations to a minimum which is acceptable for the intended applcation.
That means in plain language the shown value on your crane scale display will be adapted to the actual reference value.
Crane scales are adjusted, if during a calibration the deviation between reference weight and shown weight at display are impermissibly high. So adjustments require changes in the measuring system.
Calibrate defines the detection and documentation of the deviation of a crane scale display from the actual weight.
When calibrating the crane scale, the link between the input and output variables is determined and documented under specified conditions.
The input quantity is the actual weight and the output quantity is the electrical
output signal that is shown on display.
The duration until the next calibration of the crane scale is not exactly defined,
but may depend on numerous factors, such as Temperature fluctuations, frequency
of use and field of application.
As a rule, we recommend our customers, whose scales are used in an industrial environment to recalibrate once per year.
For example, a CE‑M approved crane scale is required if it weighs steel coils whose selling price depends on the exact weight.
The CE‑M approval of crane scales also includes separate labeling regulations. Thus, a crane scale is sealed after the conformitty assessment was successfully accepted by the legal testing authority, so that no subsequent manipulation of the measuring device is possible.
All crane scales with a load capacity of up to three tonnes must be re-calibrated every two years. Crane scales with a maximum weight load of more than three tonnes only have to be re-calibrated every three years.
In some cases, a crane scale is also referred to as a hanging scale thus stands for the same product.
The term „hanging scale” is due to the use of this type of scale, as it is hung up to weigh goods and hereby weighs hanging.
The term hanging scale is however only rarely used and the more common term „crane scale” has prevailed.
Often the term industrial scale is used in different context, which sometimes is very confusing.
If, for example, your internet search for „industrial scales” shows different provider, products or images.
The problem herewith is that this metrological term is not clearly defined and can be used for almost all scales that are used in the industry.
As the individual industries are very different, the variety of available industrial scales is also very diverse.
An image search on Google reflects this very clearly: Directly on the first page you will find images of a floor scale, counting scale, platform scale, beam scale, fruit scale, parcel scale, pallet scale, medicine scale and of course the crane scale.
This illustrates how broad the usage of this term is. But it also shows at the same time how important weighing in the industry has become!
There is almost no product that is not weighed at least once during its product life cycle. If it’s for packaging, in the valuation or for shipping documents.
However, it is therefore advisable to avoid the term industrial scale or to specify it more precisely in the appropriate context. For example: a crane scale for industrial application or industrial scale (crane scale).
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