Para Refractómetro De Mano

http://www.asuntest.com/product.asp?lx=Refractometer

Operation Manual
For Hand Held Refractometer
1.Aim the front end of the refractometer in the direction of a bright light, and adjust theadjusting ring of diopter (5) until the reticle can be seen clearly.
2.Adjustment of null
Open the cover plate(2) and put one or two drops of distilled water on the cover plate and
press it lightly,then adjust the correcting screw(3) to make the light/dark boundary coincide
with the null line.
(Salinity/ATC Model should be adjusted at an environmental temperature of 20℃).
3.Open the coverplate(2), clean the surface of prism with a piece of soft cotton
flannel,drop1~2 drops of the solution to be measured..Close the cover plate, plate,press it
lightly, then read the corresponding scale oflight and dark boundary. The reading is the brix of
measured solution.
4.After measurement, clean the surface of prism and cover plate with moist gauze. After drying,
it should be storedcarefully.
ATTENTION AND MAINTENANCE
1.Adjustment for the null liquid and specimen should be in the same temperature. If the
temperature varies greatly, the null point should be adjusted once per 30minutes.
2.After usage, do not use water to wash the instrument, so as to avoid water entering into the
pipe of the instrument.
3.This is a precision optical instrument. Handle it gently and take goodcare of it. Do not touch
or scratch the optical surfaces. Please keep it in a dry, clean and non-corrosiveness
environment, to prevent the surface from turning moldy and foggy. Please keep it in a dry,clean and non-corrosiveness environment, to prevent the surface from turning moldy and
foggy. Please avoid strong shock during transportation.
4.If the consumers use the instrument in accordancewith the mentioned method of usage, the
optical performance should not change.
TEMPERATURE COMPENSATION
The reference of temperature is 20℃. In operation,the temperature compensation should be...