A METHOD FOR DETERMINING AN ENVIRONMENT DEPENDENT USABILITY OF AN ITEM

摘要

The invention relates to a method for determining an environment dependent usability of an item using an energetically essentially passive remote-access apparatus. The method comprises receiving information indicative of a threshold, measuring the value of a measurable quantity indicative of said environment using said remote-access apparatus, and determining the environment dependent usability of the item by using said information indicative of a threshold and said value of a measurable quantity indicative of said environment. The method is essentially independent on calibration information of the remote-access apparatus. The invention relates also to a remote-access apparatus and a reader device to carry out the method.