1, electronic scale does not show zero, the display continues to flash.
2. After the electronic scale shows zero, the weight is added and weight is not displayed.
3. When the electronic scale is unloaded or loaded, the displayed figures are unstable, drifting or jumping.
4. The weighing of electronic scales is inaccurate. The displayed weighing figures are inconsistent with the number of adding and releasing weights.
5, the electronic scale is not good repeatability, plus the same weight, sometimes weighing accurately, and sometimes weighing is not accurate.
The appearance of the above five phenomena may be a problem with the weighing sensor in the electronic scale. The following tells you a simple verification method: separate the sensor that needs to be judged from the electronic scale, and measure the input impedance and output impedance respectively. The normal value of the input impedance is 380Ω, and the normal value of the output impedance is 350Ω. If the measured data is not within this range, the sensor is damaged. If the input impedance and output impedance are disconnected, check whether the sensor signal cable is disconnected. When the signal cable is in good condition, it can be judged that the sensor strain gauge is burned. This is caused by a large current entering the sensor. When the measured input impedance and output impedance are not stable, the insulating layer of the signal line may be broken, the insulation performance may be degraded, or the sensor may get wet, so that the bridge is not insulated from the elastic body. The zero output signal value of the sensor is generally between (-3mv and 2mv). If it is far beyond the scope of this standard, it may be due to an overload of the sensor that causes plastic deformation of the elastomer, making the sensor unusable. If there is no zero signal or zero output signal is very small, it may be that the strain gauges in the load cell have been detached from the elastic body or there is support to support the scale body.
In accordance with the above method to verify whether the load cell electronic scale is damaged as long as a multimeter can be resolved, I believe that as long as we master the method, we can verify their own, the sensor when changing the sensor, the signal cable when changing the signal cable .
2. After the electronic scale shows zero, the weight is added and weight is not displayed.
3. When the electronic scale is unloaded or loaded, the displayed figures are unstable, drifting or jumping.
4. The weighing of electronic scales is inaccurate. The displayed weighing figures are inconsistent with the number of adding and releasing weights.
5, the electronic scale is not good repeatability, plus the same weight, sometimes weighing accurately, and sometimes weighing is not accurate.
The appearance of the above five phenomena may be a problem with the weighing sensor in the electronic scale. The following tells you a simple verification method: separate the sensor that needs to be judged from the electronic scale, and measure the input impedance and output impedance respectively. The normal value of the input impedance is 380Ω, and the normal value of the output impedance is 350Ω. If the measured data is not within this range, the sensor is damaged. If the input impedance and output impedance are disconnected, check whether the sensor signal cable is disconnected. When the signal cable is in good condition, it can be judged that the sensor strain gauge is burned. This is caused by a large current entering the sensor. When the measured input impedance and output impedance are not stable, the insulating layer of the signal line may be broken, the insulation performance may be degraded, or the sensor may get wet, so that the bridge is not insulated from the elastic body. The zero output signal value of the sensor is generally between (-3mv and 2mv). If it is far beyond the scope of this standard, it may be due to an overload of the sensor that causes plastic deformation of the elastomer, making the sensor unusable. If there is no zero signal or zero output signal is very small, it may be that the strain gauges in the load cell have been detached from the elastic body or there is support to support the scale body.
In accordance with the above method to verify whether the load cell electronic scale is damaged as long as a multimeter can be resolved, I believe that as long as we master the method, we can verify their own, the sensor when changing the sensor, the signal cable when changing the signal cable .