Used if not required great precision. 2 Sliding weight balance. It has two known masses that can be moved about scales with a macro setting and the other with a micro graduation; placing a substance of mass unknown on the tray, determines its weight sliding masses on the aforementioned scales until the equilibrium position. Reading summing the quantities indicated by the position of the masses on the aforementioned scales is taken at that time. 3. Analytical balance. It works by comparing masses of known weight withthe mass of a substance of unknown weight.It is built based on a bar or symmetrical lever that supports using a blade type support in a central point called the fulcrum.
At its ends there are a few brackets or caps which are also supported by a few blades that allow them to swing gently. There two cymbals are suspended. In one the masses or certified weights are placed and on the other those that need to analyze. The whole has a system of assurance or blockade which It allows the main lever sit stably when it is not used or required modifying the counterweights. It has an external box that protects the balance of interference, such as air currents, which could occur in the place where is installed. At present, is considered an analytical balance that can weigh ten-thousandths gram (0.0001 g) or one hundred thousandths of a gram (0.00001 g); they have a capacity which usually reaches up to 200 grams.A set of certified masses, which has parts with mass of different magnitude are required for use.
The game is generally composed of the following parts: 4. balance of top dish. This type of balance has a saucer of load placed in the upper part, which is supported by a column that is kept in a vertical position by two pairs of tracks that have flexible couplings.
