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What are the precautions to be taken when using load cells?
- Categories:Technical knowledge
- Time of issue:2021-04-12 11:16
(Summary description)To ensure the performance of an industrial electronic scale, it is not enough to consider how the load cell and weighing instrument are selected. The load connection device for the load cell is also one of the most important aspects in determining the performance of an electronic scale. Many electronic scales do not meet the design requirements, often due to the improper selection of the load connection device.
What are the precautions to be taken when using load cells?
(Summary description)To ensure the performance of an industrial electronic scale, it is not enough to consider how the load cell and weighing instrument are selected. The load connection device for the load cell is also one of the most important aspects in determining the performance of an electronic scale. Many electronic scales do not meet the design requirements, often due to the improper selection of the load connection device.
- Categories:Technical knowledge
- Time of issue:2021-04-12 11:16
- Views:
To ensure the performance of an industrial electronic scale, it is not enough to consider how the load cell and weighing instrument are selected. The load connection device for the load cell is also one of the most important aspects in determining the performance of an electronic scale. Many electronic scales do not meet the design requirements, often due to the improper selection of the load connection device.
The main function of the load connection device is to ensure that the weight of the material carried by the scale body can be transferred to the load cell according to the force method of the load cell without introducing the weight of the material carried by any extraneous interfering forces. The scales referred to here can be hoppers, silos, storage tanks, weighing platforms, weighing boxes, metering belts, metering roller tables, etc., or even part of the application equipment, such as blocks for fixed pulley travel cranes, frames for steel (iron) water tankers, etc.
1. To ensure that the loading line of the loading connection coincides with the force axis of the load cell and to overcome the effects of tilting loads and eccentric loads on the measurement performance due to mounting problems, a mounting tool should be used to ensure this if necessary.
2. if the electronic scale is subjected to excessive horizontal and lateral impact forces during use that will exceed the lateral force resistance or self-resetting capacity of the load connection device, consider designing or adding a special limit device to the load connection device;
3. electronic scales that are subjected to severe impacts during loading should have an overload protection device added to the load connection device or an additional overload protection structure;
4. to prevent damage to the load cell by high currents flowing directly through the body of the cell, a current bypass device can be added to the load connection device. A current bypass device made of braided copper wire should be selected and the ends of the load connection device compressed with bolts.
5. the connection between the pull load connection device and the scale body and the scale mounting frame shall be secure; the contact between the compression load connection device and the scale body and the scale mounting base shall be smooth;
6. Application examples of hopper load cells and loading connections: the use of 3 load cells to form a hopper scale reduces the rigidity requirements of the hopper and the hopper mounting frame, making the system easy to install and commission and easy to obtain high accuracy and good stability results.
Industrial electronic scales consist mainly of steel structures which expand and contract due to temperature changes. For higher requirements, fixed, semi-floating and fully floating load connections can be used in combination.
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