Magnetic StirrerIt is a laboratory instrument used for liquid mixing, mainly for stirring or simultaneously heating and stirring low viscosity liquids or solid-liquid mixtures. The basic principle is to use the principle of magnetic repulsion and attraction of magnetic fields, and use the magnetic field to push the magnetic stirrer placed in the container to rotate in a circular motion, thereby achieving the purpose of stirring the liquid. Combined with the heating temperature control system, the sample temperature can be heated and controlled according to specific experimental requirements to maintain the temperature conditions required for the experiment and ensure that the liquid mixture meets the experimental requirements.
When the magnetic stirrer malfunctions, do not immediately take action:
1. Move the mouth before starting: When the magnetic stirrer malfunctions, it is not necessary to start first. Instead, inquire about the process and symptoms of the malfunction. For unfamiliar equipment, one should first familiarize themselves with the circuit principles and structural characteristics, and follow the corresponding rules. Before dismantling, it is necessary to fully familiarize oneself with the function, position, connection method, and relationship with other surrounding components of each electrical component. In the absence of an assembly diagram, sketches should be drawn and marked while dismantling.
2. External first, internal later: should be checked firstMagnetic StirrerCheck for any obvious cracks or defects, understand their maintenance history, service life, etc., and then inspect the interior of the machine. Before dismantling, it is necessary to eliminate the surrounding fault factors and determine that it is an internal fault before dismantling. Otherwise, blind dismantling may cause the equipment to deteriorate over time.
3. Electrical inspection after magnetic stirrer: Only after confirming the mechanical parts *, can electrical inspection be carried out. When checking for circuit faults, detection instruments should be used to locate the faulty area. After confirming that there is no poor contact fault, the operation relationship between the circuit and the machinery should be checked in a targeted manner to avoid misjudgment.
4. Static first, then dynamic: When the equipment is not powered on, judge the quality of electrical equipment buttons, transformers, thermal relays, and fuses to determine the location of the fault.Magnetic StirrerPower on test, listen to its sound, measure parameters, determine faults, and then carry out maintenance. If it is impossible to distinguish the three-phase voltage value when the motor is in phase loss, one should listen to its sound and measure the relative ground voltage separately to determine which phase is missing.