Usage

open the cover (3) and carefully wipe the detection prism (2) with a soft cloth. Take several drops of the solution to be tested, place them on the detection prism, and gently close the upper cover to avoid bubbles and make the solution spread all over the Prism surface. Align the instrument light board (3) with the light source or bright place, observe the field of view through the eyepiece, and rotate the eyepiece to adjust the handwheel (6) to make the blue and white dividing line of the field of view clear. The scale value of the dividing line is the concentration of the solution.

Precautions
this instrument is precision optical instrument, and the following matters should be paid attention to in use and maintenance:
1. Be careful and careful in use, use strictly according to the instructions, do not loosen the connection parts of the instrument at will, do not fall or collide, and strenuous vibration is strictly prohibited.
2. After use, it is forbidden to directly put it into water for cleaning, and wipe it with a clean soft cloth. For optical surface, it should not be bruised or scratched.
3. The instrument should be kept in a dry and non-corrosive place.
4. Avoid losing spare parts.

 5. The adjustment range of vision adjustment handwheel 6 and eyepiece 7 is within 2cm upper and lower, so this part falls off due to the operation exceeding 2cm, which is not a quality problem, but an operation mistake. Our store is not responsible.