We often use weighing load cells, and we are very clear about the installation of the weighing module, but this only applies to the installation of a single weighing load cell. In practical applications, it is often applicable to multiple weighing load cells or even different types of weighing load cells. So, how to install the corresponding weighing load cell?
Usually three or more sensors form a sensing system, on the one hand to maintain the stability of the weighing body, on the other hand to increase the weight tonnage. In electronic balance systems composed of multiple sensors, in addition to selecting the appropriate load and correct installation of the weighing load cell, attention should also be paid to the fixing columns and jacks on both sides of each weighing load cell. The height of the fixing column should be slightly lower than the height of the sensor by 3 mm to 4 mm. Therefore, when replacing or maintaining the sensor, a suitable thickness of washer should be placed on the fixing column after using a jack to replace the top of the weighing body. The sensor should be supported by the bracket, releasing 4 mm to 5 mm as temporary support, to protect the sensor during overload of the weighing body. To prevent the weighing body from moving horizontally due to impacts, etc., appropriate limiters should be installed according to the structure of the weighing body. The weighing load cell should be installed on a horizontal surface, which should be kept horizontal even when loaded to prevent uneven load distribution due to tilting and damage to the sensor.
Pay attention to the environment. High temperature, dust, humidity, corrosive environment and electromagnetic field environment will cause serious damage to the weighing load cell. Therefore, it is necessary to pay attention to the environmental factors when using the weighing load cell, or select the appropriate weighing load cell according to the given environment.
Prevent debris from contaminating the weighing load cell, so as not to affect the movement and accuracy of the moving parts. Some "baffle boards" can be placed around the weighing load cell or a thin metal plate can be used to cover the sensor.
Electrical connection. The conductor connecting or leading out the display circuit should be a shielded cable. The readout circuit for the sensor output signal should not be equipped with devices that can produce interference and high heat.
To avoid damage caused by welding current or lightning strikes, a copper wire with a cross-sectional area of about 50mm2 should be used to form a bypass for the sensor, while avoiding strong heat radiation.
The signal cable of the sensor should not be arranged parallel to the power supply line or control line.
To prevent lateral forces from acting on the sensor, structural accessories with automatic positioning or resetting functions such as spherical bearings, joint bearings, and positioning fasteners can be used.
The weighing load cell should be handled with care to prevent collisions, falls, etc. At the same time, the sensor base should be flat, clean, with sufficient strength and rigidity, and without any oil film or glue film.
Even if the weighing load cell has overload capability, it should be avoided to damage the weighing load cell due to overload.
The power supply line and control line should be wound at a speed of 50 revolutions/minute. If the sensor signal line needs to be extended, a special sealed cable junction box should be used. If the signal cable is long, a compensation circuit with a relay amplifier should be considered.
To ensure the weighing accuracy, the installation plane of the installation seat of a single weighing load cell should be leveled. In order to make the loads borne by each sensor basically equivalent, the installation surface of the base seat with multiple sensors installed should be adjusted to a horizontal plane as much as possible.
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