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Dielectric Dissipation Factor Tester - Use New Oil Sample to Clean Oil Cup
Sometimes, there are many oil samples, testing will be carried out one by one. The cleaning of electrode may be simplified as follows:(1) Turn off the instrument, take out oil cup from heater, and take out inner electrode from oil cup;(2) Pour oil from oil cup into a container, use new oil sample to ...
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Dielectric Dissipation Factor Tester - Cleaning of Oil Cup
It is critical important to have oil cup cleaned before measuring. Insulating oil is extremely sensitive to any tiny pollution, so the cleaning work should be carried out as follows:. (1) Take out electrode; (2) Clean with neutral soap or detergent. Do not damage surface of electrode; (3) Clean electrode ...
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Faraday's laws of electrolysis
• Faraday's 1st Law of Electrolysis - The mass of a substance altered at an electrode during electrolysis is directly proportional to the quantity of electricity transferred at that electrode. Quantity of electricity refers to the quantity of electrical charge, typically measured in coulomb. • Faraday's ...
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Working principle of Karl Fischer moisture analyzer
Karl Fischer reagent reacts with water as follows:The reagent is a mixture of iodine, pyridine with sulfur dioxide and methanol etc. The iodine is formed on the anode by electrolysis. According to Faraday's law, the same amount of electric charge is proportional, the formula is as follows:It is easy ...
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Some tips on selection of gas chromatographic column
Generally, when operators use gas chromatograph first time, they do not know how to configure chromatographic column reasonably. They always want more chromatographic columns because they believe the more columns bring the better. Then, they blindly purchase many columns, stationary liquid or supporters ...
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Gas chromatographic test method
Gas chromatographic test method is a part of gas chromatography. It should contain two aspects: one is the proper selection and use of detectors, the other is the optimization of relevant conditions. A good gas chromatographic test method should be in an optimal condition of these two aspects. 1. Proper ...
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Impact of chromatographic column temperature
Most separation works are carried out at room temperature. If laboratory temperature keeps the same, the separation work goes smoothly. However, in most cases, the temperature will change, which directly affects the experiments. Temperature affects the isocratic retention time of separation. Generally, ...
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Tools you need to install capillary column
1. Cutting tools, such as diamond, carbon head pen, ceramic wedge etc;2. Magnifier (10X - 20X)3. Ruler4. Wrench5. Ferrule6. Solvent bottle7. Clean syringe needle8. Non-column retained compound sample9. Mixed sample for chromatographic column test10. Flow meter11. Others, such as washer, O type ring etc.
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Installation steps of capillary column
1. Check gas filter, carrier gas, sample injection washer and liner pipe etc.;2. Fix nut and ferrule to column, carefully cut flat the two terminals of chromatographic column;3. Connect chromatographic column to sample injection inlet;4. Connect to carrier gas;5. Connect chromatographic column to detector;6. ...
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How does a gas chromatograph work?
Gas chromatograph is an important instrument for separating and measuring the mixed compounds with low boiling point. It is suitable for chemical, food, gas and research analysis. Gas chromatography analyzes gas substance or substance which can be converted into gas at a certain temperature. Because ...
