Factors that cause errors in electronic balances
2021-06-30 08:03:27
As we all know, electronic balances are balances that are weighed by the principle of electromagnetic force or electromagnetic torque balance. The accuracy and stability are high. In addition, the electronic balance is equipped with an LCD liquid crystal display, and the readings are 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 error caused by the electronic balance. the reason:
Reasons 1. Method error There are many kinds of error in method 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. error. 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.
The second reason is that the error of the personnel is limited by the resolution of the measurer, the physiological changes of the visual organs caused by the work fatigue, the errors caused by the reaction speed and the inherent habits, and the errors caused by the mental negligence.
Reason 3: Device error The standard measuring instrument used to reproduce the standard value in a fixed form, the instrument or instrument used for the measurement, and the vicinity of the instrument and the ancillary equipment inevitably contain errors.
Reason 4: Environmental error The error caused by the measurement device and the change of the measurement itself caused by various environmental factors and the required standard state, such as temperature, humidity, air pressure (causing disturbance of various parts of the air), vibration, Error caused by electromagnetic fields, light, etc. 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.
Reasons 1. Method error There are many kinds of error in method 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. error. 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.
The second reason is that the error of the personnel is limited by the resolution of the measurer, the physiological changes of the visual organs caused by the work fatigue, the errors caused by the reaction speed and the inherent habits, and the errors caused by the mental negligence.
Reason 3: Device error The standard measuring instrument used to reproduce the standard value in a fixed form, the instrument or instrument used for the measurement, and the vicinity of the instrument and the ancillary equipment inevitably contain errors.
Reason 4: Environmental error The error caused by the measurement device and the change of the measurement itself caused by various environmental factors and the required standard state, such as temperature, humidity, air pressure (causing disturbance of various parts of the air), vibration, Error caused by electromagnetic fields, light, etc. 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.
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