Precautions when using the force sensor

Although the force sensor has the characteristics of solidarity and durability, there are still some problems we should pay attention to when it is used. 

1. protecting the force sensor from contamination caused by the external environment

We should try to set up some "baffles" around the force sensor, and even cover the force sensor with a thin metal plate. This can prevent debris from contaminating the force sensor and certain movable parts, and this "contamination" often affects the weighing accuracy.

2. the connection of the shielding wire and the grounding point should be reasonable

All wires leading to or from the display circuit should adopt shielding cables. The connection and grounding point of the shielded wire should be reasonable. If it is not grounded through the mechanical frame, it is grounded externally.

3. avoiding strong heat radiation

The force sensor should use hinged copper wires (cross-sectional area of ​​about 50mm²) to form an electrical bypass to protect them from welding current or lightning strikes. During the use of the force sensor, strong heat radiation must be avoided, especially strong heat radiation on one side.

4. Handle with care

Please handle with care, especially the small-capacity sensor made of alloy aluminum elastomer. Any impact or drop may cause great damage to its measurement performance. For a large-capacity force sensor, generally speaking, it has a relatively large dead weight, so it is required to use appropriate lifting equipment (such as chain hoists, electric hoists, etc.) as much as possible when handling and installing. The mounting surface of the base where the sensor is installed should be flat and clean, without any oil film, glue film, etc. The mounting base itself should have sufficient strength and rigidity, which is generally required to be higher than the strength and rigidity of the sensor itself.

5. preventing overloading of sensors

Although the force sensor has a certain overload capacity, the force sensor should still be prevented from being overloaded during the installation of the force sensor. It should be noted that even a short-term overload may cause permanent damage to the sensor. In the installation process, if it is really necessary, you can replace the sensor with a block of the same height as the sensor, and then replace the sensor at the end. In normal operation, the sensor should generally be equipped with mechanical structural parts for overload protection. If a screw is used to fix the sensor, a certain tightening torque is required, and the screw should have a certain depth of screwing into the thread. Generally speaking, the fixed screw should be a high-strength screw.

6. Level adjustment

There are two aspects to level adjustment. One is that the mounting surface of a single sensor mounting base should be leveled with a level gauge. On the other hand, the mounting surface of the mounting base of multiple sensors should be adjusted to a level as much as possible (using a level), especially if the number of sensors is more than three. In the force system, we should pay more attention to this point. The main purpose of doing this is to make the load of each sensor basically the same. The loading direction of each force sensor is determined, and when we use it, we must load the load in this direction. Lateral forces, additional bending moments, and torque forces should be avoided as much as possible.

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