UNTITLED Hand Refracto Meter User Guide

UNTITLED Hand Refracto Meter

Hand Refractometer Instructions Operating

Note:

1.  Each of the models in the Series catalog with footnote “bp” has a prism base made of black engineering plastics.
2. “Weight” listed here refers to the weight of the plain type refractometer.

Name of components

1. Prism
2. Cover plate
3. Corrccting screw
4. Mirror tube
5. Eyepiece (Adjusting ring of diopter)

USE

• Portable Refractometer model REF 401~408 is a precision optical instrument especially for measuring the ice point of engine coolant and the operation state of battery charging liquid. It is suitable for vehicles, such as cars, tractors, tanks, ships,s etc, which use ethylene glycol as coolant, sulphuric acid as charging liquid. It is characterized by small volume, light weight, and easy operation; therefore, it can be used from all sides.

METHOD OF OPERATION

1. Aim the front end of the refractometer in the direction of the bright, and adjust the adjusting ring of diopter 5 until the reticle can be seen clearly.
2. Adjustment of null. Open the cover plate 2, drop one or two drops of pure distilled water on the surface of the prism. Close the cover plate and press it lightly, then adjust the correct screw 3 to make the light/dark boundary coincide with the water line.
3. Open the cover plate 2 and wipe the water off the surfaces of the prism and cover plate with an emery cloth, then drop one or two drops of the liquid needed to test on the prism surface, close the cover plate, and press it lightly. The corresponding dial reading on the light/dark boundary is the ice point of the liquid, or the indication of the operation state of the battery liquid.
4. After measuring, wipe the liquid off the prism surface with an emery cloth. After drying, please keep it appropriately in the store.

ATTENTIONS AND MAINTENANCE

1. Adjusting the null liquid and specimen should be under the same temperature; if the temperature varies greatly, the null point should be adjusted once per 30 minutes.
2. The prism must be cleaned completely. because any residual impurity on it could cause an error during measurement.
3. Because the battery liquid contains sulphuric acid, it must be dipped in by a glass rod instead of your hand to avoid hurt of you.
4. After usage, don’t use water to wash the instrument, so as to avoid water entering into pipc of the instrument.
5. As it is a kind of precision optical instrument, you should handle it gently and take good care of it. Don’t touch or scratch the optical surfaces. It should be kept in an environment of dry, clean, and non-corrosive air, so as to prevent the surface of it from turning mouldy and foggy. Please avoid strong shocks during transportation.
6. If the consumers use the instrument in accordance with the mentioned of usage, it guarantees that the instrument can’t break down. The optical performance can’t change.

Temperature Compensation

• REF411-418 Model has a built-in automatic temperature compensation system. Compensation temperature range 10°C to 30°C

Accessories

1. Cleaning cloth
2. Suction tube
3. Serew driver