The checkweighing machine sensor also has requirements for the environment. If it is used in an inappropriate environment, some problems will occur. Next, let's talk about which environments will affect the checkweighing machine sensor.
1. The influence of electromagnetic field on sensor output disturbance signal
In this case, the shielding of the sensor should be strictly checked to see if it has good electromagnetic resistance.
2. In a highly corrosive environment
If moisture and acid cause damage to the elastic body or short circuit of the sensor, the outer surface should be sprayed with plastic or stainless steel outer cover, which has good corrosion resistance and good airtightness.
3. The influence of dust and humidity on the short circuit of the sensor
In this environmental condition, a sensor with high airtightness should be selected. Different sensors have different sealing methods, and their airtightness is very different. Common seals include sealant filling or coating; rubber gasket mechanical fastening seal; welding (argon arc welding, plasma beam welding) and vacuum nitrogen filling seal. From the perspective of sealing effect, welding and sealing is the best, and filling and coating sealant is poor in quantity. For sensors that work in a clean and dry environment indoors, you can choose a glue-sealed sensor. For some sensors that work in a humid and dusty environment, you should choose a diaphragm heat seal or a diaphragm welding seal, and Vacuum nitrogen filled sensor.
4. Flammable and explosive
Flammable and explosive not only cause thorough damage to the sensor, but also pose a great threat to other equipment and personal safety. Therefore, sensors that work in flammable and explosive environments have higher requirements for explosion-proof performance: explosion-proof sensors must be selected in flammable and explosive environments. The sealed housing of such sensors must not only consider its airtightness, but also Consider the explosion-proof strength, as well as the waterproof, moisture-proof, and explosion-proof properties of the cable leads. Secondly, the choice of the number and range of sensors.
5. High temperature environment
The high temperature environment causes problems such as melting of coating materials, opening of solder joints, and structural changes in the stress in the elastomer. For sensors that work in high temperature environments, high temperature sensors are often used; in addition, heat insulation, water cooling or air cooling must be added.
According to the several environments introduced above, we must pay attention to avoid using the equipment in these environments when using the automatic weighing machine.
The above information is provided by checkweigher system manufacturer.
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