Analysis of the four major causes of error in electronic balances

The so-called electronic balance is a balance that uses the principle of electromagnetic force or electromagnetic torque balance to measure, and its accuracy and stability are high. In addition, the electronic balance is equipped with an LCD liquid crystal display, and the reading is accurate and clear. Electronic balances are precision electronic instruments that are susceptible to external environmental factors, so we need to find out the source of these errors so that we can reduce the error to get more accurate results. Let's briefly analyze the source of the error of the electronic balance. .

Electronic balance error source:

1, device error

Standard gauges used to reproduce standard quantities in a fixed form, instruments or meters used for measurements, and nearby and attached equipment inevitably contain errors.

2, environmental error

Due to various environmental factors and the required standard state, the errors caused by the measurement device and the changes caused by the measurement itself, such as temperature, humidity, air pressure (which causes disturbance of various parts of the air), vibration, electromagnetic field, light, etc. Error. Usually, the indication error generated by the electronic balance instrument under the specified conditions is called the basic error, and the error caused by the use of this condition is called the additional error.

3, method error

There are many kinds of error in the method, such as the error caused by the approximate measurement method. For example, the diameter d of the measuring circle is measured by the circumferential length s, and then the calculation method is used, which may cause errors due to different values. Errors caused by incorrect measurement methods, such as incorrect installation and use of measuring instruments. The method error also includes the error caused by the incorrect principle of the measurement.

4, personnel error

Due to the limitations of the measurer's resolution, the physiological changes in the visual organs caused by work fatigue, the speed of reaction and the errors caused by the inherent habits, and the errors caused by mental insufficiency.