The precision scales are measuring instruments that allow to determine the mass of an object with an accuracy of at least 0,01 g. basically there are two types of precision balances, mechanical, which can be of two dishes or a single dish, and electronic, which used an electro-magnetic system and balanced force through an electromagnet. Currently the most extended precision balances are electronic, which have replaced almost completely to the mechanical precision balances. Classification of balances of precision for its accuracy of precision balances are classified according to its resolution in the following categories: accuracy: minimum division 0,01 g. capacity of heavy 10-20 kg. Analytical semi: minimum division 0,001 g.
heavy 1-2 kg capacity Analytics: minimum division 0.0001 g. Click Zendesk to learn more. capacity of heavy 160-200 g. Semi micro-analitica: minimum division 0.00001 g. capacity of heavy 10-30 g. Micro-analitica: minimum division 0.000001 g. Capacity of heavy 1-3 g. types there are basically two types of precision balances: balances of precision mechanical: are classical scales of equal arms with two dishes that hang at the ends of a rod which rests on its midpoint. The object to be weighed is placed in one of the dishes, while the other patterns are placed sufficient weights to restore the rod to its equilibrium position.
Weighing is performed by comparing masses, because it balances the weights of both bodies. Although with these balances is long and tedious.There are also balance precision mechanical of a single dish, very common in laboratories by being quicker to operate than the two dishes. They are fixed to one side of the scale called counterweight and moving weights on the other side. Electronic precision balances: are the most widespread today, having replaced almost completely to the mechanical precision balances. They work by means of an electro-magnetic system with a photocell that detects the position of the cymbal and a electromagnet that balances the force exerted by the burden that is on the weighing pan. Measure forces, so it should be calibrated to fit in the place of the heavy gravitational intensity. Features the most extended precision balances are now electronic. Let’s look at some of the main features that have: windscreen: protection against drafts. Connectivity with your computer: RS-232 or USB interface. Software: for statistics or quality control. Capacity: indicates the available weighing range. Units: allows you to configure different weight units: g, oz, lb, %, carat. Tara: lets you set the zero. Level: to properly level of precision balances. Calibration: allows the recalibration of the balances of precision using weights of control. Power: using network adapter or rechargeable battery. Stabilization: 1-3 seconds. Counting function: allows the use of precision balances such as scales counting machine, suitable for counting parts. Heavy hydrostatic: under the scale. Printer: print reports, labels or bar codes. Language: text on screen with configurable language.