Common problems of weighing instrument application maintenance
The weighing instruments used in weighing equipment belong to the category of high-precision instrument equipment. The installation, application, and maintenance must be done in accordance with the regulations in the instructions for use to ensure the safety of the instrument panel, and everything is normal. accurate. Otherwise, it is very likely to cause damage to the dashboard or reduce its service life. 1. Installation: Generally, the instrument panel should be placed in a natural environment with clean, dry, natural ventilation and suitable temperature. The instrument panel should be fixed, and there is no need to move it frequently, otherwise it is likely to cause the internal wires of the communication cable power plug to fall and cause common failures. 2. Switching power supply: most weighing instruments use 220 volt alternating current, and the allowable range of working voltage is generally 187 volts ---242 volts. After changing the switching power supply route, remember to accurately measure whether the working voltage meets the regulations before connecting the power supply to the instrument panel. If the 380V switching power supply is mistakenly connected to the instrument panel, it is likely to cause damage. Places where the power supply voltage fluctuates greatly should be equipped with a regulated power supply with excellent characteristics (such as a CW type communication AC main parameter regulated power supply) to ensure all normal applications of the instrument panel. It is not necessary to use the same power plug with strong interference signals (such as motors, electric bells, fluorescent tubes) to prevent unstable information values u200bu200bdisplayed on the dashboard. Some dashboards (such as HAWK meters, etc.) are dual-purpose AC and DC power supplies. Be aware when installing into battery applications, battery leakage will destroy the dashboard. When the rechargeable battery power supply system is not used for a long time, the rechargeable battery should be removed. 3. Grounding device: the weighing instrument should be connected to a separate and good wire connector (the resistance of the grounding wire is less than 4 ohms, and the wire of the grounding device should be as short as possible. The wire connector has a two-way function: it can maintain the safety of the actual operation staff, and in addition It also has a key anti-interference function, which can ensure the smooth operation of the instrument panel. The ground wire is connected to the power plug of the instrument panel. If the instrument panel ground wire is connected to the public weak current protection area network, it is likely to be The instrument panel causes the influence of the switching power supply, which makes the information value displayed on the instrument panel fluctuate. It should be regularly maintained whether the grounding wire node is in good contact. After a long time, the air oxidation and rust of each node will cause the instrument panel to actually fail 4. Sunscreen isolation: prevent the sun from shining on the gray-black cabinet of the dashboard, otherwise it may cause the dashboard office environment to exceed the rated temperature range and be destroyed. 5. Moisture-proof: under normal conditions, the dashboard office environment Although the humidity reaches 95%, it is required not to cause condensation. The unique stainless steel plate cabinet with moisture-proof effect is outside the instrument panel. 6. Anti-corrosion: corrosive chemicals cannot penetrate into the interior of the instrument panel, otherwise it will affect the PCB circuit board The components on the board and the pcb circuit board themselves cause corrosion. Over time, it is likely to damage the instrument panel. Even the instrument panel with anti-corrosion effect.
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