Magnetic mixers are laboratory instruments used for liquid mixing, primarily for agitating or simultaneously heating a low viscosity liquid or solid-liquid mixture. Users have some problems in the process of maintaining the magnetic mixer. It is also necessary to pay attention to it. Today we will introduce the eight problems that should be paid attention to in the maintenance of the magnetic mixer. I hope to help users to better apply the product.
1. Move the mouth again: When the electric mixer is faulty, do not respond to the first action. You should first ask before and after the fault occurs and the fault phenomenon. For unfamiliar equipment, you should also be familiar with the circuit principle and structural characteristics, and abide by the corresponding rules. Before disassembling, be familiar with the function, position, connection method and relationship with other devices around the electrical components. If there is no assembly drawing, draw a sketch and mark it.
2, first external and internal: first check the equipment for obvious cracks, defects, understand its maintenance history, age, etc., and then check the machine. Before the disassembly, the surrounding fault factors should be excluded, and it can be disassembled after it is determined to be an internal fault. Otherwise, blind disassembly may worsen the equipment.
3, mechanical after the electrical: only after determining that the mechanical parts are not faulty, then carry out electrical inspections. When checking the circuit fault, you should use the testing instrument to find the fault location, and confirm the faultless fault after the contact, and then check the operational relationship between the line and the machine in order to avoid misjudgment.
4. Dynamic after static: When the equipment is not powered, judge the quality of the electrical equipment buttons, transformers, thermal relays and fuses to determine the fault. Power-on test, listen to its sound, measure parameters, judge faults, and finally perform maintenance. For example, when the motor is out of phase, if the three-phase voltage value cannot be determined, it should be heard and the relative ground voltage measured separately to determine which phase is missing.
5, first clean and repair: For heavy-duty electrical equipment, first clean its buttons, wiring points, contact points, check whether the external control keys are malfunctioning. Many faults are caused by dirty and conductive dust.
6, after the power supply equipment: the failure rate of the power supply part of the entire faulty equipment accounted for a high proportion, so the first to repair the power supply can often get twice the result with half the effort.
7. First fault after commissioning: For electrical equipment with both commissioning and faults, the fault should be eliminated first, and then commissioning. The commissioning must be carried out under the premise of electrical line speed.
8, the first general after the special: due to the quality of assembly parts or other equipment failure caused by the failure, generally accounted for about 50% of common faults. The special faults of electrical equipment are mostly soft faults, which are measured and repaired by experience and instrumentation.
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