4 reasons why electronic balance weighing produces errors

Electronic balance, precision electronic balance, analysis of four reasons for the error caused by electronic balance weighing

The cause of the error in the weighing of the electronic balance:

1 method error

There are many kinds of error in the method, such as the error caused by the approximate measurement method. If the diameter d of the measuring circle is measured by the circumferential length s, then the calculation method will 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.

2 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.

3 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.

4 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.

Electronic balance mechanical part inspection

1) Check if the switch is too tight, too loose, and the eccentric shaft rotates less than the low point of zui or exceeds the low point of zui.

2) Check the agate edge of the beam of the electronic balance for wear, sensation and balance. Check if the balance pointer is perpendicular to the beam.

3) Check the verticality, level, and base plate of the column.

4) Check whether the hanging lugs of the suspension system are stuck, tilted, unstable, and the damper has problems such as internal and external cylinders hanging, swaying, and tilting.

5) Whether the encoder has a card hanging phenomenon.