1 | Carefully clean the prism (1) and the tilting cover (2) of the refractometer (5) with a lint-free cloth. |
Do not enter in manual contact with the surface of the prism. |
2 | Carefully remove any waste of water from the prism (1) and from the tilting cover (2). |
3 | Adjust the refractometer before each test. |
In equipments with automatic temperature compensation (ATC), the temperature oscillations from 5 ... 30 °C are automatically compensated. |
4 | Apply 1 or 2 drops of distilled water on the prism (1), and close the tilting cover (2) with a slight pressure. |
By closing the tilting closing (2), the distilled water is evenly distributed. |
5 | Look through the viewfinder (4) against a light background. |
Scales can be adjusted by turning the sight glass (4). |
If necessary, carefully adjust the adjustment screw (3) with a screwdriver, so that the light/dark limit is aligned with the zero line (water line). |
W14.40-1419-11