Common Failures and Solutions about Electronic Weighing(continue)

When you need to use the electronic scale, but it is broken is not very anxious? In daily life for the disease we pay attention to the right remedy then for the instrument we must also know its common problems. Here to see what are the common failures of electronic scales!

At present in China's electronic scales sensor common problems maintenance is based on the principle of mostly resistive strain gage load cell, its application is also becoming more and more common electronic scales have the advantages of weighing fast, display intuitive, not easy to wear and tear, has gradually replaced mechanical scales.

Electronic scales mainly have a load-bearing force transmission system, load cells, and display instruments. The working principle of the commonly used resistance-strain load cell is that the elastic deformation of the elastomer under the action of an external force causes the resistance strain gauges pasted on its surface to deform along with it. This completes the process of converting the external force into a signal.

Common failures about electronic weighing

• Display lack of scratch. The display and the circuit board contact are not good, there is a broken circuit, PCU segment selection signal transistor, the latch is damaged, the display internal short circuit, replace the display.

• The power on the self-test, but the display does not light up after the self-test. The keypad is not reset, or the keyboard is damaged.

• The power is not displayed, no self-test. First, check whether the power supply part of the fuse is blown.

• Zero point drift. The electronic bench scale in each use after the zero is not good, resulting in drift. Whether by vibration, wind, power supply interference or other external influences. Circuit board insulation resistance down, there are dirty, clean with alcohol. Amplifier anti-interference ability decreases, self-excitation. Zero checker failure, integral capacitor insulation resistance decline aging, resulting in increased loss, the repair can be used to replace the experiment to remove the fault.

• The weight-bearing table weighing inconsistencies in the four corners (corner difference). First check whether the sensor screws are tight, limit screws, and scale body clearance is reasonable, if the above problems are still inconsistent, then the available group file gently file the sensor bore, the principle is: to show the smaller value of the corresponding side hole file thin, increase the amount of elastomer change, maintenance attention should not be filed too much, should be gradually adjusted in several times to prevent damage to the sensor.

• The output is unstable, jumping words. The power supply is unstable, and the AC ripple of power supply to integrator and zero checkers is too large. The double integration is unstable, and the integration capacitor loss increases and leakage. Sensor caused by the failure, the phenomenon of inconsistent results of multiple measurements, and zero point drift, creep, using a multimeter to measure the sensor output impedance, empty scale m signal, insulation resistance is normal, such as the value of the excess of more than the sensor has been damaged, should be replaced promptly.

Conclusion

For more information about electronic table scale,electronic postal scale,china electron weighing luggage scale, we are glad to answer for you.