Handheld 0-100% seawater optical density breeding salinometer tester refractometer hydrometer tester

manual: 1. Open the cover and carefully insert the prism with a soft cloth 2. Take a few drops of the solution to be tested, place it on the prism, and gently close the cover to avoid air bubbles and spread the solution over the surface of the prism 3. Aim the light entrance plate of the instrument at the bright place of the light source, observe the scene through the eyepiece, turn the eyepiece adjustment handwheel 4. Make the blue and white dividing line of the field of view clear, and the scale value of the dividing line is the concentration of the solution calibration: Take a few drops of distilled water, put it on the detection prism, turn the zero adjustment screw to adjust the dividing line to the 0% position of the scale, and then wipe the detection prism to perform detection Precautions: 1. In the process of use, you must be careful and use strictly in accordance with the instructions. Do not loosen the connecting parts of the instrument arbitrarily, do not collide, strictly prohibit severe vibration 2. After use, it is strictly forbidden to directly put it in water for cleaning, use a clean soft cloth to wipe, and should not scratch or scratch the optical surface 3. The instrument should be kept in a dry, non-corrosive place 4. Avoid missing spare parts Packing list： 1*screwdriver 1×Cleaning cloth 1*English manual 1x straw 1*Refractometer box