Analyze the working principle of the new magnetic stirrer
The magnetic stirrer is suitable for mixing or heating and stirring at the same time, and is suitable for liquid or solid-liquid mixture which is not very thick. After the liquid is placed in the container by using the principle of magnetic field and vortex, the stirring piece is simultaneously put into the liquid. When the base generates a magnetic field, the stirring piece is driven to rotate in a circular motion to achieve the purpose of stirring the liquid. With the temperature control device, the sample temperature can be controlled and maintained according to the specific experimental requirements, helping the experimenter to set the experimental conditions, greatly improving the possibility of experimental repeatability.
working principle
Using the characteristics of the same nature of the magnetic material, the magnetic stirrer is rotated by constantly changing the polarity of the two ends of the base, and the sample is rotated by the rotation of the magnetic stirrer to uniformly mix the sample; the microcomputer control technology ensures the accuracy of the stirring. Stable performance
Stirring speed digital setting and display
Automatically memorize the last set of operating parameters, very convenient for fixed experimental conditions
Anti-corrosion enamel mixing table, ABS plastic case, long service life
An anti-corrosion liquid guiding tank is designed on the top of the control panel, even if the liquid splashes, it will not damage the equipment.
The sample is heated by the bottom temperature control plate, and the rotation of the magnetic stirrer is used to uniformly heat the sample to a specified temperature;
Through heating power adjustment, the heating rate is controllable for a wider sample processing.
Magnetic stirrer
Magnetic stirrer
A typical magnetic stirrer has two functions of stirring and heating.
Specifically:
The first effect is to make the reactants mix evenly and make the temperature uniform;
The second role, speed up the reaction, or evaporation rate, shrink
Precautions
1. When stirring, when the stirrer is beating or not stirring, please turn off the power and check if the bottom of the beaker is flat and the position is positive. Please measure it at the same time. The current voltage is between 220V±10V, otherwise the above will occur. Happening.
2, the heating time is generally not too long, intermittent use to extend the life, not heating without stirring.
3. It can work continuously for 8 hours at medium speed, and can work continuously for 4 hours at high speed. It can prevent severe vibration during work.
4. Power consumption: The power socket should be a three-hole safety socket, which must be properly grounded.
5. The instrument should be kept clean and dry. It is forbidden to flow into the machine to avoid damage to the machine. When not working, the power should be cut off.
Magnetic stirrer dimensions: maintenance
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.
When the electric stirrer is damaged in the experiment, we must not be anxious. We should calmly deal with it. We will deal with it according to the 8 points we explained above. We will first judge the cause of the malfunction, and then we will be able to do more with less. In addition, we must also use it in daily use. Pay attention to the maintenance of the electric mixer to extend the life of the equipment as much as possible.
The company's main stainless steel water collector, tank bottom weld vacuum test box, reading instrument, eight-stage air microbial sampler, relay comprehensive tester, dual-wavelength scanner, coating thickness gauge, soil mill, tempered glass surface Flatness tester, sound sensor, portable electric water level gauge, network mouth flow meter, corrosion rate meter, portable scratch tester, freezing point tester, water quality tester, online ammonia tester, coating thickness gauge, coating Thickness gauge, soil pulverizer, digital thermometer, gas sampling pump, ceramic impact tester, automatic crystallization point tester, drug freezing point tester, reed switch tester, constant temperature water bath, gasoline root turn, gas Sampling pump, tempered glass tester, water quality tester, PM2.5 tester, inhalable particulate matter detector, high frequency heat sealing machine, strain control triaxial instrument, milk somatic cell detector, helium gas concentration detector, soil moisture conductance Rate tester, field strength meter, collection box, color ratio tester, capillary water absorption time measuring instrument, redox potentiometer vibrometer, carbon monoxide carbon dioxide detection , CO2 analyzer, oscillopolarograph, slime content tester, car starter power supply, automatic potentiometric titrator, portable thermometer, zirconia analyzer, reed switch tester, precision conductivity meter, TOC water quality analysis Instrument, microcomputer plasticity tester, wind direction station, automatic spotting instrument, soil oxidation reduction potentiometer, digital thermometer, portable total phosphorus tester, corrosion rate meter, constant temperature water bath, residual chlorine detector, free expansion rate meter , centrifuge cup, concrete saturated vapor pressure device, particle strength tester, Gauss meter, automatic film coating machine, safety valve grinding tool, weather station, kinesthetic orientation instrument, dark adaptation instrument, smell collector, rain gauge, four in one Gas analyzer, emulsion concentration meter, dissolved oxygen meter, temperature measuring instrument, thin layer planking device, temperature recorder, aging meter, noise detector, constant temperature and humidity chamber, split resistivity tester, initial viscosity and holding viscosity Tester, infrared carbon dioxide analyzer, hydrogen lamp, kinesthetic orientation instrument, constant temperature animal operating table, cooling fan, grease acid value detector, viscosity meter, colony counter, Weather station, rain gauge, Kjeldahl nitrogen analyzer, fluorescent whitening agent, the company adhering to the "customer first, forge ahead" business philosophy, adhere to the "customer first" principle to provide our clients with quality services. Welcome patrons!
· Special Design : Grinding texture is clear and clear,smooth glaze design makes cleaning more convenient. At the same time,it also ensures the clean and sanitary of tableware.
· Stackable & Easy to Clean: These dishes are stackable and DON'T take up a lot of space in your cupboard. Easy to clean, Dishwash top secure. But not use in Microwave.
· Unbreakable & Durable: Melamine is a kind of environmentally friendly materials, does not contain BPA, It won't be shatter like glass and porcelain. It is also perfectly stackable.
Melamine Dish;Melamine Fast Food Dish;Melamine Serving Dish;Food Grade Melamine Dish
Nanjing Demei Melamine Wares Co.,Ltd , https://www.dm-melaminewares.com