Analytical balance is a balance that is closely related to daily work processes in the laboratory. Every laboratory must rely on the working principle of analytical balances for various purposes. Working by relying on electric power, let's look at a further explanation of the following digital analytical scales.
Usefulness of analytical scales
Like other scales, analytical scales are also used to measure the mass of an object. However, this analytical balance has a function to weigh objects in very small masses, that is, the size of sub milligrams.
Analytical scales can measure up to 4 digits behind the comma, so they can be very reliable in industries like pharmaceuticals. Because of this, analytical balances are more often used in the laboratory to make a new substance composition which is the result of a combination of other substances with a high degree of accuracy.
Broadly speaking, analytical scales measure pressure to weigh mass, not measure the real mass of an object. For this reason, this analytical or laboratory balance needs to be calibrated periodically.
The external component of the analytical balance
Analytical scales do take a number of different forms, depending on their use. Even so, we can be sure that the functions, work methods, and components remain the same.
• Weighing plate (weighing plate) : A place to place the object to be measured its mass. It is advisable to clean the weighing plate before taking a measurement, just use a brush or dry tissue.
• Weights : The components used for the analytical balance calibration process.
• Glass protector: To protect the results of the scales from external components such as air. Must always be closed during the weighing process.
• Anti-draft ring : Minimizes the influence of airflow on the balance.
• Display panel : Displays balance results, balance features, error notifications and information regarding balance settings.
It can be said that the main components of an analytical balance include the weighing plate, glass guard, and the weighing unit's power supply.
Analytical balance working principle
We have studied the functions and components of analytical balances, now is the time to know the working principles of analytical balances. This working principle starts from when the object is placed on the disk, where the mass of the object will be distributed evenly throughout the area of ??the weighing disc. The load force is then directed to the load cell of the scale. The added mass of this object causes the load cell to curve downward.
Furthermore, the load forces also cause deformation in the strain gauge section which consists of metal tracks or metal grooves connected to the circuit board. If these metal tracks are subjected to tension, the circuit boards will stretch.
After that, the strain gauge will convert the deformation into an electrical signal. The downward curved load cell also has an electric charge, so there will be a change in electrical resistance. This is what causes an electrical signal to appear during the weighing process.
This electrical signal will be conveyed through the converter, through the microchip which will translate the data from the scale, and the mass number of the object will appear on the scale display panel. That's the working principle of digital analytical scales.
Be careful with analytic scales
It is true that digital analytic scales are more accurate and very practical to use. However, as users, we must also be careful in placing the analytical balance so that it does not affect the results of the scale later. Due to their high degree of accuracy, it is highly recommended to place analytical balances in a separate room from the laboratory. This is so that passing laboratory staff will not interfere with the weighing process.
Also, make sure that the analytical balance is placed on a table or flat base and free of dirt. One more thing that must be considered, namely the conditions in which the analytic scales will be placed and stored.
Analytical scales should not be exposed to direct sunlight to prevent expansion. Meanwhile, analytical scales should not be stored in a humid place because they can cause corrosion. So, double check where you will store your analytical scales so that they can last longer.
That's a more in-depth explanation of analytical scales. In operation, you need an analytical balance that is reliable and practical to use. Use the Mettler Toledo brand analytical scale available at Hyprowira, which is equipped with a touch screen display and accurate weighing results for various laboratory operation functions. Hopefully the information regarding the principles of analytic balance above is useful for you!