{"id":7975,"date":"2026-04-17T11:30:13","date_gmt":"2026-04-17T03:30:13","guid":{"rendered":"https:\/\/www.air-tester.com\/?p=7975"},"modified":"2026-04-18T11:52:03","modified_gmt":"2026-04-18T03:52:03","slug":"qi-mi-yi-shi-yong-huan-jing","status":"publish","type":"post","link":"https:\/\/www.air-tester.com\/en\/qi-mi-yi-shi-yong-huan-jing.html\/","title":{"rendered":"Q&A: What are the requirements for the environment in which the airtightness tester is used? Please take this checklist"},"content":{"rendered":"

The most common complaint heard on the production line is: \"TheThe equipment is unstable, isn't it?airtight instruments<\/a>Problems?<\/strong>\"<\/p>\n\n\n\n

The answers are often surprising:The instrument is fine, the environment is.<\/strong>The<\/p>\n\n\n\n

\"Factory
Precision EngineeringAirtightness Tester<\/a>Application in the laboratory of a customer's plant<\/em><\/figcaption><\/figure>\n\n\n\n

But behind that answer lies an even harsher truth - theYou know there is something wrong with your environment, but it is difficult to actually change it.<\/strong><\/p>\n\n\n\n

\u2160. The laws of physics will not be compromised<\/h2>\n\n\n\n

Airtightness Tester<\/a>works based on a middle school physics equation:<\/p>\n\n\n\n

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PV = nRT (ideal gas equation of state)<\/strong><\/p>\n<\/blockquote>\n\n\n\n

\"\u5feb\u95ee\u5feb\u7b54\uff1a\u6c14\u5bc6\u6027\u68c0\u6d4b\u4eea\u5bf9\u4f7f\u7528\u73af\u5883\u6709\u4ec0\u4e48\u8981\u6c42\uff1f\u8fd9\u4efd\u6392\u67e5\u6e05\u5355\u8bf7\u6536\u597d\u63d2\u56fe1\"
Gas tightness testing ideal gas equation of state formula<\/em><\/figcaption><\/figure>\n\n\n\n

This formula dictates an iron law:Any change in temperature, humidity, air pressure, etc. is recognized by the instrument as a pressure change<\/strong>The instrument itself, on the other hand, was unable to distinguish between a real leak and an environmental disturbance. The instrument itself, on the other hand, could not distinguish whether this pressure change came from a real leak, or an environmental disturbance.<\/p>\n\n\n\n

In other words, the environment is not an auxiliary condition, but thePart of precision<\/strong>The<\/p>\n\n\n\n

It's like weighing a milligram item on a balance; it's impossible to get an accurate reading outdoors on a windy day. It's simple, but often difficult to put into practice on the production line.<\/p>\n\n\n\n

II. Environmental elements: the gap between ideals and reality<\/h2>\n\n\n\n

Temperature: the biggest unseen variable<\/h3>\n\n\n\n

ground PV = nRT<\/strong>For every 1 \u00b0C rise in temperature, the air pressure in the closed chamber rises significantly, to an extent that may even mask the pressure change of a small leak.
Industry standard requires temperature 15~30 \u2103, fluctuation \u00b11 \u2103, high-precision scenarios require \u00b10.5 \u2103.<\/strong>The
However, production line air conditioning, fans blowing directly, the temperature difference between day and night, workpiece waste heat and other problems prevail, to achieve constant temperature standards, often require independent constant temperature room, high cost.<\/p>\n\n\n\n

Humidity: the underestimated invisible killer<\/h3>\n\n\n\n

Water vapor in the compressed air enters the air line and condenses on the sensor surface, directly causing data drift.
Standard requirements for humidity \u226485% RH, the gas source needs to be dried, filtered, stabilized pressure treatment<\/strong>The
However, the investment of a complete set of air compressor, cold dryer, three-stage filter, may be higher than the instrument itself; and most companies neglect maintenance, filter element clogging, cold dryer failure, will make the data chronic distortion.<\/p>\n\n\n\n

Barometric pressure: a neglected baseline variable<\/h3>\n\n\n\n

Atmospheric pressure fluctuates dramatically with altitude and weather, and the difference in barometric pressure between rain and shine at the same location is equally significant.
High-end equipment such as Precision Engineering'sairtightness leak detector<\/a>Auto-compensating, manual calibration for low and mid-range equipment<\/strong>The production line will be adjusted to the weather on a daily basis.<\/p>\n\n\n\n

Vibration: the forgotten source of interference<\/h3>\n\n\n\n

Vibrations from presses, injection molding machines, and assembly lines are transmitted to the inspection station, causing fluctuations in sensor signals and unstable workpiece seals.
The ideal solution is a stand-alone vibration-proof workstation<\/strong>, but it is difficult to realize in the inch production line.<\/p>\n\n\n\n

III. Comparison of environmental sensitivity of three hermetic detection methods<\/h2>\n\n\n\n
Detection method<\/th>environmental sensitivity<\/th>Cause analysis<\/th>Accuracy level<\/th><\/tr><\/thead>
Water test (immersion method)<\/td>lower (one's head)<\/td>Observe the bubbles and make a rough judgment<\/td>millimeter<\/td><\/tr>
Dry Leak Detection (airtightness meter<\/a>)<\/td>mid-to-high<\/td>Measuring pressure changes<\/td>micron scale<\/td><\/tr>
Helium mass spectrometry (helium detector<\/a>)<\/td>extremely high<\/td>Molecular level detection<\/td>nanoscale<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

This comparison reveals a cruel law:The higher the accuracy, the more sensitive it is to the environment<\/strong>The<\/p>\n\n\n\n

\u2163. Difference between the standard configuration and the actual production line environment<\/h2>\n\n\n\n

Ideal environmental standards<\/h3>\n\n\n\n
Temperature: 25\u00b15\u2103
Humidity: 40%-~70% RH
Gas source: drying + filtering + pressure stabilization
Workstation: no direct wind blowing + anti-vibration design
Product: Thermal equilibrium \u2265 10 minutes before testing<\/code><\/pre>\n\n\n\n
Common Fatal Mistakes<\/h3>\n\n\n\n