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.
CE-M Approval is a legally regulated quality control. A CE-M approved crane scale is required by law when used to define product prices.
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.
The term industrial scale is not defined uniformly and can stand for different types of scales.
In most cases, the industrial scale means a floor scale or larger counting scale. However, although rarely used, the term may also be synonymous with the crane scale.