Weighing sensor itself is a kind of strong, durable, reliable mechanical and electrical products, in order to ensure the normal use and measuring precision, so need to maintenance of products on a regular basis. So how users maintain weighing sensor? Below small make up for the maintenance of specific introduction of weighing sensor, hope you can help to you.

The maintenance of the weighing sensor

1. Weighing sensor should try to set some "flapper" around, even with a thin metal plate up the sensor cover. Can help to prevent sundry defiled sensor and some moving parts, and this kind of "contamination" tends to make the movable part of the movement, and affect the weighing accuracy. System for the movement not great, you can use the following method. That is, on the balance plus or minus about one over one thousand rated load to see if the weighing display, reflect, reflect, that moving part is not "contamination".

2. All the way to display circuit or wires from the circuit, are shielded cable should be adopted. Shielding wire connection and the site should be reasonable. If not through mechanical framework grounding, the outer earth, but after shielding wire connection each other off ground, is empty. Note: there are three sensors is full and connection method, the sensor itself is a four wire system, but in the terminal box with six wire connection. Sensor output signal readout circuit should not produce strong interference set can be "charged with silicon, contactor, etc.) and has a considerable quantity of heat produced by equipment placed in the same enclosure, if can't guarantee that, should consider to set the mask isolation between them, and put the fan in the casing. Measure the sensor output signal of the electronic circuit, should as far as possible configuration independent power supply transformer, and don't share the same mains contactor and other equipment.

3. The sensor should be hinged copper wire (about 50 was cross-sectional area) form the electric bypass, to protect them from the welding current or the damage by lightning. Sensors in use, strong thermal radiation must be avoided, especially in unilateral strong thermal radiation.

For 4. The electrical connection in the aspects, such as sensor signal cable, with high voltage power line or line parallel arrangement (for example, don't put the sensor signal lines and high voltage power line and control line in the same pipe). If they must be placed in parallel, then, the distance between them should be kept in more than 50 cm, and the signal lines with tube is set up.

5. Try to adopt the structure of the automatic positioning (reset) accessories, such as spherical bearings, joint bearings, positioning fastening device, etc. They can prevent some lateral force on the sensor. To: some transverse force is not caused by the mechanical installation, such as thermal expansion caused by transverse force, wind cause transverse force, and some container class weighing apparatus on the lateral force caused by the vibration of the agitator is not caused by the mechanical installation. Some instruments on some attachments must be received the scales on the body, such as the transporting pipe, etc.) of balance of container, we should let them on the load sensor axis direction as far as possible some soft, to prevent them from "eat" sensor real load caused by the error.

6. To should take put down gently especially small capacity sensor made by aluminum alloy elastomer, any impact, drop, the performance measurement may cause great damage. For large capacity of weighing sensor, generally speaking, it has a larger weight, thus requirements during transportation, installation, as far as possible, use the appropriate lifting equipment (such as hand chain hoist, electric hoist, etc.). The base of the sensor installation face should level off, clean, no oil film, film, etc. Install base itself should have sufficient strength and rigidity, strength and rigidity of general requirements above the sensor itself.

7. Weighing sensor, although there is a certain overload ability, but in the process of weighing system installation, still should prevent overload of the sensor. Note that even the short time overload, also may cause permanent damage to the sensor. During the installation process, if really necessary, can use first one and sensors, such as the height of the block instead of in the end, then the sensor changes. General should be set in normal work, sensor overload protection of the mechanical structure. If use screw fixed sensors for fastening torque to a certain extent, and the screw should have certain screwing in the depth of thread. In general, the fixed screw because of the high strength screw.

8. No matter under what circumstances, the power line and control line shall be twisted up and close degree 50 r/m, if the sensor signal lines need to extend, should adopt special sealed cable junction box. If there is no such a junction box, and use cable and cable direct docking (soldering end), should be sealed container special attention, good insulation resistance shall be checked after, and reach the standard (2000 ~ 5000 m), when necessary, should be to calibrate the sensor. If the signal cable is very long, and to ensure the high accuracy of measurement, should consider adopting cable compensation circuit with relay amplifier.

9. Adjust: level adjustment, there are two aspects of content. One is the installation of single sensor mounting base plane with adjusting levels, on the other hand refers to the mounting surface of multiple sensors installed base will try to adjust to a horizontal plane (level), especially the number of sensors is more than three of the weighing system, more attention should be paid to this, the main purpose is to make the sensors on the load. Each loading direction of the weighing sensor is certain, and when we use, must be in the direction of load on the load. Lateral force, additional bending moment, torque force should be avoided.