Calibrating weighing systems: the different types of zero-setting

This is the procedure to be carried out when the system is put into service.

It enables zero setting the weight value of the non-removable tare, i.e. the load receptor in the weighing system (silos, hopper, weighing belt, platform, etc.).

If the procedure is performed correctly, it does not need to be repeated.

This enables zero setting the weight when the value that deviates from 0 is very small.

This is useful, for example, in situations where there is no load on the system, but the display still shows a non-zero weight value.

On most LAUMAS instruments this type of zero-setting is kept in memory, while on others it is lost at switch-off.

It is also called the NET/GROSS function and allows the partial zero-setting of the weight to be performed several times in sequence.

It is very useful, for example,

• to carry out manual or semi-automatic batching when loading multiple products into a single container and the intention is to start at zero each time a new one is added;
• to zero set the weight of a container, for example in a sale by weight where you only pay for the actual product content.

While reading the net weight, it is also possible to temporarily display the gross weight, so that both measurements can be monitored during the operation.

This zero-setting should be performed every time, since it is lost when the instrument is switched off. 

This allows entering a known tare value manually, which is subtracted from the weight value shown by the indicator.
This value is stored in the instrument's memory throughout the weighing cycle until it is switched off.

It is very useful for weighing products already placed on the same structure of which we know the weight, such as pallets.

Starting from the measurement of the gross weight value (pallet + material to be weighed), it is possible to obtain the net weight of the material on the pallet.
After entering the known weight of the pallet in the system (preset tare), it will then be possible to know the weight of the product with certainty.