A method for charging a reagent in a device of specimen handling an automatic testing device (20) comprising: - providing a kit (80) having a plurality of containers (70, 72, 74, 76, 78) with selected reagents therein; - providing a plurality of trays (50a, 50b, 50c, 50d) each having at least one receptacle for the reagent (52a-j), wherein each of said containers (70, 72, 74, 76, 78) is marked visually with a defined set of icons (90, 92, 94, 96, 98) and each of said receptacles for the reactants (52a-j) icon is visually marked by a selected icon from said set of icons (90, 92, 94, 96, 98); - emptying the reagent at least one of said containers (70, 72, 74, 76, 78) in the receptacle to reagents (52a-j) which are visually marked with defined icon in said set of icons (90, 92, 94, 96, 98) to visually mark said container from which the reagent is empty; - marking selected in said handling device specimen and the trays (50a, 50b, 50c, 50d) with icons (100, 102, 104, 106) positions, - mounting said trays (50a, 50b, 50c, 50d) in selected in said device specimen handling such positions that each of said trays (50a, 50b, 50c, 50d) are marked with the same icon marking on said selected position in which icon said tray is mounted (50a , 50b, 50c, 50d); and - automatically download the appropriate reagents of the receptacles (52a-j) appropriate individual specimens on the specimen handling device (20).
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