generally, the vacuum pump should be overhauled after 2000 hours of operation, check the aging degree of the rubber seal, check whether the exhaust valve disc is cracked, and clean up the dirt deposited on the valve disc and exhaust valve seat. clean the parts in the whole vacuum pump cavity, such as rotors, rotating blades, springs, etc. it is usually washed with gasoline and dried. after cleaning the rubber parts, dry them with a dry cloth. when cleaning and assembling, handle with care to avoid bumping....
issue date:2022/03/08/gb/t26808-2011 constant temperature bath and constant temperature circulating device low temperature constant temperature bath and gb/t26809-2011 constant temperature bath and constant temperature circulating device low temperature constant temperature circulating device drafted under the auspices of the company, after nearly four years of solicitation and repeated discussion by all experts of the drafting working group of climate and environmental equipment standards of sac/tc526 national technical committee for standardization of laboratory instruments and equipment (cmif/tc16 technical committee for ...
issue date:2022/03/08/when powered on, do not touch the electrical part of the left space of the box by hand or wipe it with a wet cloth and rinse it with water. cut off the power supply during maintenance. ...
issue date:2022/03/08/water bath pot is mainly used for distilling, drying, concentrating, and soaking chemicals or biological products in the laboratory. it can also be used for constant temperature heating and other temperature tests. it is a necessary tool for biology, genetics, viruses, aquatic products, etc. ...
issue date:2022/03/08/the instruments in use shall be subject to periodic verification. if necessary (the instruments are used frequently or in a qualified critical state), intermediate self-examination shall be carried out to determine that their metrological performance is qualified, and the coefficient error is within the allowable range, otherwise accurate data cannot be obtained....
issue date:2022/03/08/photochemical reaction process is one of the universal and important processes on the earth. the photosynthesis of green plants, animal vision, the photocatalysis of coatings and polymer materials, as well as the photocatalysis of photography, lithography and organic chemical reactions are all related to photochemical processes. in recent years, photochemistry is a very active field, such as the photoinduced separation of isotopes and similar elements, the synthesis and application of optically controlled functional systems and so on. however, in terms of theory and experimental technology, photochemis...
issue date:2022/03/08/01. during continuous operation of the constant temperature shaking table, regular inspection should be carried out every three months: check whether there are water drops, dirt, etc. falling on the motor and control elements; clean the dust on the axial flow fan; check the fuse, control element and fastening screw....
issue date:2022/03/08/jiangsu tianling carbon dioxide incubator is a device for in vitro culture of cells / tissues by simulating the formation of a growth environment similar to cells / tissues in organisms in the incubator, such as stable temperature (37 ° c), stable co2 level (5%), constant ph (ph: 7.2-7.4), and high relative saturation humidity (95%). it is widely used in cell and tissue culture and the culture of some special microorganisms. ...
issue date:2022/03/08/if the ultra-low temperature cabinet is used, or the ultra-low temperature cabinet is handled, or the ultra-low temperature cabinet is powered off (including power failure) for more than 10 hours, the machine must be inspected before use (or before being powered on again). confirm the machine is qualified....
issue date:2022/03/08/the characteristics of sterile homogenizer are very suitable for tumor tissue, which can not only obtain a large number of single cells, but also realize soft crushing of tissue cells. homogenization treatment can prevent fat floating and separation, improve the stability of dairy products, improve the texture, improve the digestion and absorption of milk, and have an impact on the physical and chemical properties of fat globules, proteins and milk. after homogenization, the diameter of fat globules in milk became smaller and the number increased. when not homogenized, the diameter of fat balls is mostl...
issue date:2022/03/08/national free consultation hotline：400-928-3898
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address: no. 4, zhonglian road, baocai industrial park,
yandu district, yancheng city.
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