Adjust refractometer (5) from the checking and measuring case before every measurement.
1
Carefully clean the prism (1) and the folding cover (2) using a soft, lint-free cloth.
Do not touch the surface of the prism (1) with your fingers. Otherwise, this may lead to an error when adjusting.
W14.40-1419-11
2
Place 1 to 2 drops of distilled water on the prism (1) and close the hinged lid (2) using gentle pressure.
Only the prism (1) and the hinged lid (2) should come into contact with the fluid. AdBlue® can find its way into the refractometer (5) otherwise and make it unusable.
Closing of the hinged lid (2) causes the water to be distributed evenly.
3
Bring the scales of scale (B) for AdBlue® into focus by turning the eyepiece (4).
To do this, look through the eyepiece (4) against a light background when turning.
4
Carefully adjust adjustment screw (3) using a screwdriver so that the light/dark border matches the zero line (water line).
5
Carefully clean the prism (1) and the folding cover (2) using a soft, lint-free cloth.
