usually in the production environment, due to temperature difference and other external factors on the gas leak detector leak detection has a certain negative impact, in order to ensure good test results, we need to master the gas leak detector of several major leak detection tips, then the gas leak detector What are the leak detection methods.

leak detection method of gas leak detector:

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1. leak detection by injection method:

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leak detection by injection method is to connect the inspected piece to the detection port of the leak detector, and continuously spray tracer gas to the suspected leak hole with a spray gun. the tracer gas enters the leak detector through the leak hole and is detected. The shell of electronic devices, high voltage switch tube, zinc oxide, lightning arrester, etc. should be used in this method of leak detection.

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2, charging leak detection method:

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fill a leak-indicating substance with a certain pressure inside the inspected part. if there is a leak hole on the inspected part, the leak-indicating substance will leak out from the leak hole, use a certain method or instrument to detect the leakage material leaking from the leakage hole outside the inspected part, so as to determine the existence, position and leakage rate of the leakage hole, which is the pressure leak detection method.

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3. vacuum gauge leak detection method:

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the readings of some vacuum gauges are related to gas types, such as thermocouple gauges and ionization vacuum gauges. Select the appropriate gas or liquid to do the leak material, these vacuum gauges have become detectors, the general coating machine has a vacuum gauge, it is very convenient to use, is also the 1 commonly used leak detection method. Thermometer used to show the leakage of substances, such as carbon dioxide, butane, alcohol, etc., the reaction of the thermocouple is slow, and the observation should be very careful. The leakage materials used in the ionization meter are helium, argon, alcohol, etc.

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4. pressurized leak detection method:

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pressurized leak detection method is also called positive pressure sealed leak detection method. the inside of the inspected part is filled with leak detection gas with higher pressure than the outside, use appropriate methods to judge whether tracer gas leaks, where it leaks, and how much it leaks, etc. outside the inspected part, and then judge whether the inspected part has leaks, and the location and size of the leaks. The methods that belong to this category include inflation method, pressure drop method, bubble method, halogen leak detector external probe method, halogen blowtorch method, pressurized penetration method, acoustic wave method, infrared thermal image method, mass method, radioisotope method and helium mass spectrometry suction gun method.

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the leak detection method of the gas leak detector will be shared here first. no matter which leak detection method is adopted, the operator is required to have careful observation ability and high sense of responsibility, because false detection and missed detection will cause losses. in addition, the operator's alertness and proficiency in finding unknown things are also very important.