If you weigh for trade purposes, i.e. if you invoice your clients based on measured weight, then the law obliges you to use a legal for trade scale. Nearly all RAVAS mobile weighing systems are available in legal for trade version.
How is a legal for trade scale built?
A legal for trade scale is built from certified components and among other things contains a level switch that switches off the display when the scale is inclined more than two degrees, in order to prevent weighing errors. Every legal for trade scale is tested according to norms defined in internatinal law, and delivered with a certificate. This certificate states the name of the manufacturer, the product, the serial number, the approval number under which the product has been certified, the norms according to which the scale has been verified and stamped, and the gravitational factor with which the initial verification has been carried out.
How do you recognise a legal for trade scale?
A legal for trade scale is marked in several distinctive ways: a sticker with the letter M on a green field, marking the equipment as legal for trade; an oval sticker with the text OIML III or IIII, indicating the stamping class; a CE-sticker showing the year of manufacture and the ID-number of certifying organisation. There may also be a sticker stating the month and year that the scale was last verified.
How often does a legal for trade scale need verification?
Public authorities check whether legal for trade scales are used where this is required, and whether your legal for trade scales are within the accuracy norms required by law. The inspectors usually visit unannounced. It is your responsibility as a user to ensure that your legal for trade scales remain within the required accuracy. Verification once a year is advised. This may be done by a RAVAS representative or by any other certified organisation.