Hand-held refractometer is a precision optical instrument used to measure the concentration of liquid. It has the characteristics of simple operation, convenient portability, convenient use, few measurement samples, accurate and rapid, etc. It is a must for scientific research, mechanical processing, food processing and marine aquaculture. Equipment
The main technical parameters:
1. The magnification of the optical system is three times
2. The main types of measurement range and minimum scale are:
A. Sugar content: 0 ~ 32%, the minimum scale is: 0,2%
B salinity: 0 ~ 100% The minimum scale is: 1%
C processing: 0 ~ 18%, the minimum scale is: 0.1%
How to use the handheld refractometer:
1. Please align the front part of the refractometer to the bright direction, and adjust the refractive index of the eyepiece until the scale on the reticle can be clearly seen.
2. Zero adjustment
Open the cover plate, drop one or two drops of distilled water on the surface of the prism, then cover the cover plate and gently flatten it, adjust the adjustment screw so that the light and dark boundary line is consistent with the zero scale line (no temperature is not recommended. The refractometer must be at Celsius (Use zero adjustment at an ambient temperature of 20 degrees)
3. Measurement
Open the cover and wipe off the moisture on the surface of the prism and the cover with gauze. Then drop one or two drops of the liquid to be measured on the surface of the prism, cover with a cover plate, and gently flatten, that is, the value can be read from the scale of the light and dark boundary line. This value is the freezing point of the coolant
4. After the measurement, wipe the liquid on the surface of the prism and the cover plate, and after drying, store the refractometer correctly
Precautions and storage methods for handheld refractometers "
1. Zero adjustment and measurement must be within the same temperature range. If the temperature changes greatly, you need to adjust the zero point again after 30 minutes.
2. Care must be exercised in re-use, use in strict accordance with the instructions, do not loosen the link parts of the instrument arbitrarily, and do not drop, bump, or severe vibration
3. The prism must be wiped off quickly, because the unclean substances remaining on it will cause measurement errors
4. After use, do not rinse the instrument with water to prevent moisture from entering the instrument
5. The refractometer is a very precise optical instrument, which must be handled lightly and kept properly. Do not touch or scratch the surface of optical parts with sharp objects to prevent scratches. The refractometer should be placed in a dry, clean, non-corrosive environment to prevent mildew and mist. Avoid violent impact during transportation
6. Avoid loss of spare parts
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