To measure electrolyte density, it is necessary to use the device under the name the areometer. Its principle of action is based on Archimedes's law, that is that extent of immersion of an object in some liquid and, therefore, and the weight of the forced-out liquid directly depend on the weight of the body.
1. The matter became again relevant not so long ago because again the served accumulators became fashionable. And though they demand certain labor costs on the service, term of their service considerably bigger, than from unattended accumulator batteries.
2. The areometer in essence represents a small hollow glass tube (float) in which the sheet of paper with the scale of density applied on it is inserted. At the moment for needs of motorists release rather large number of types of these devices, their prices also considerably vary. The ordinary cheap areometer with two scales quite will be suitable for household use: one – for measurement of density of electrolyte, the second – antifreeze.
3. Process of measurement of density comes down to a fence from the accumulator of a number of electrolyte (antifreeze from a radiator) by means of special rubber pear. Pour the gathered liquid in in advance prepared net capacity. You watch that the areometer freely floated in it: kept vertical position, did not cling to edges of ware. After that take a float of the device and determine the level of its immersion by the mark left by electrolyte. Compare the top limit of level of liquid with value of the scale applied on an areometer wall.
4. All measurements of density should be taken at the ambient temperature equal of 20 °C. Otherwise, it is necessary to make amendments to results of measurements to the greater or lower side, to compliance with the table submitted in figure 1.
5. When carrying out measurements it is impossible to forget about security measures as acid can not only spoil your clothes, but also to become the cause of a serious chemical burn. Therefore before sampling from the accumulator do not forget to put on special glasses for protection of eyes and also rubber gloves and an apron.