Electronic balance classification and technical parameters

Balances are weighing instruments that weigh objects. The electronic balance has the characteristics of simple structure, convenient and practical, and high weighing speed. It is widely used in enterprises and laboratories, and used to determine the quality of objects. Electronic balances are generally classified by precision.

Can be divided into the following categories:

(1) Levels below 1mg are called electronic precision balances (2) 0.1mg are called electronic analytical balances (3) 0.01mg are called quasi-microbalances (4) 1ug are called microbalances (5) 0.1ug and above are called levels The specific conversion ratio of the microelectronic balance is as follows: 100mg = 0.1g = tenth 10mg = 0.01g = one hundredth 1mg = 0.001g = one thousandth 0.1mg = 0.0001g = one ten thousandth 0.01mg = 0.00001g One-tenth of a million 1 μg = 0.001 mg = 0.000001 g = 1 part per million 0.1 μg = 0.0001 mg = 0.0000001 g = one ten-thousandth When purchasing a balance, users need to understand several key technical parameters:

1. Full weighing: The maximum mass value (full load value) that the balance can weigh, often expressed in grams (g).

2. Sensibility: The maximum mass required to turn the balance pointer from the balance position to the dial one degree. Therefore, sentimentality is also called divisional value and is usually expressed in milligrams (mg). The smaller the value, the more sensitive the balance will be.

3. Unequal arm ratio: refers to the maximum value of the weighing error caused by the two arms of the beam (the distance from the knife edge to the left and right knife edges), often in units of milligrams or divisions. Sometimes it is also called deviation.

4.Variability: refers to the balance after balance, due to several times the beam system ups and downs, causing the maximum deviation of the pointer before and after the equilibrium position, often in milligrams or divisions as a unit. This is a parameter that marks the stability of the balance.

5. Balance level: According to China's current standard, according to the ratio of the nominal balance of balance and the balance of the balance, divided into 10 levels.

6. Tourcode scale error: Refers to the quality measured by the tour code dialed to the position of each ruled line of the ruler, and the maximum mass error of the corresponding standard weight. Also known as rider yardage error or rider error.

7. Nominal value and verification value: The specifications of the various balances are marked with the above six technical parameters. These six technical parameters are indicators that comprehensively measure the measurement performance of the balance, but do not reflect the actual conditions of the balance measurement performance. Therefore, it is called a nominal or nominal value. The actual performance of the balance measurement performance must be verified according to the prescribed procedures before calculating the verification value. After the balance is newly purchased or repaired, the test value shall not exceed the nominal value (to be exact, it shall be the nominal level); some indicators of the balance in use (such as unequal arm) may be slightly Relax some. The operation method of the electronic balance is simple, the user who purchases for the first time can operate with reference to the manual, generally does not need the professional to install and debug.