I. Scope of Application
\nCleanroom \/ Transfer Window \/ Air Shower \/ Clean Workbench HEPA\/ULPA High-Efficiency Filters
\nMethod: Aerosol Scanning Leak Detection Method (Upstream Dust Generation + Downstream Scanning)
\nII. Preparations Before Testing
\n1. Instruments and Consumables
\nAerosol Photometer (with dual channels for upstream\/downstream)
\nAerosol Generator (heated \/ cooled PAO\/DOP)
\nIsokinetic Sampling Gun, Hose
\nCalibration Certificate within Validity Period
\nClean Rags, 75% Ethanol
\n2. System Status
\nAir Conditioner \/ Fan Running for \u2265 10 minutes continuously
\nCleanliness Filters Surface Cleaned Free of Dust
\nClean Area Free of Dust, No Operations, Minimum Personnel
\nAll Doors, Windows, Inspection Holes Closed
\n3. Instrument Preparation
\nPhotometer Turned On and Preheated for \u2265 15 minutes
\nZero Point Calibration, Range Calibration
\nConnect Upstream Sampling Tube to Filter Upstream Static Pressure Box
\nIII. Formal Leak Detection Operating Steps (Full Version)
\nStep 1: Establish Upstream Challenge Concentration
\nConnect the aerosol generator to the upstream air duct of the high-efficiency filter
\nTurn on the generator, let the dust generation stabilize for 3-5 minutes
\nRead the upstream concentration with the photometer:
\nControlled within 10-30 \u03bcg\/L
\nPhotometer Settings:
\nDisplay Mode: Leakage Rate (% Penetration Rate)
\nAlarm Threshold: \u2264 0.01%
\nStep 2: Zeroing of the Photometer (Baseline Calibration)
\nConfirm the stability of the upstream concentration
\nPerform Zeroing\/Baseline Setting on the photometer
\nAt this time, the display should be 0.00%
\nStep 3: Downstream Scanning Leak Detection (Core Operation)
\nSampling Gun Scans the Outflow Surface of the High-Efficiency Filter
\nDistance from Filter Surface: 1-2 cm
\nMoving Speed: \u2264 5 cm\/s
\nScan Path:
\nS-shaped Repeated Scanning
\nInter-space Overlap \u2265 50%
\nMust Cover the Entire Filter Surface:
\nAll Filter Surfaces
\nFour-Edge Frame Sealing
\nFilter Frame and Frame Joint Sealing
\nCompression Strip, Screw Holes
\nInstallation Sealing Compound Application Area
\nStep 4: Leakage Determination
\nAny Position Where:
\nReading > 0.01%
\nContinuous Alarm \/ Clear Peak
\n\u2192 Judged as Leakage Point, Mark the Position.
\nStep 5: Leakage Handling and Re-testing
\nMinor Leakage:
\nRe-tighten the Frame
\nReplace the Sealant Strip
\nRepair the Sealant Compound
\nFilter Material Damage, Pinholes, Unrepairable:
\nMust Replace the High-Efficiency Filter
\nAfter Completion:
\nRe-perform Full Area Scanning Leak Detection
\nUntil All Points \u2264 0.01%
\nStep 6: Conclusion and Restoration
\nTurn off the Aerosol Generator
\nThe System Continues to Exhaust Air for 5-10 minutes to Remove Residual Aerosols
\nRemove the Dust Generation Tube and Sampling Tube
\nClean the Equipment Surface
\nRecord Data, Archive
\nIV. Quality Control Standards (GMP General)
\nFilter Surface: No Leakage
\nFrame and Installation Joint: No Leakage
\nLeakage Rate of All Scanning Points: \u2264 0.01%
\nFan, Air Volume, Pressure Difference Normal
\nV. Key Points (Avoiding Non-Conformity)
\nUpstream Concentration Must Be Stable
\nScan Slowly, Full Coverage, Overlapping Scan
\nEdges, Corners, Joints Are Seismic Areas
\nLeakage Must Be Re-tested for Conformity Before Release<\/p>","protected":false},"excerpt":{"rendered":"
I. Scope of Application Cleanroom \/ Transfer Window \/ Air Shower \/ Clean Workbench HEPA\/ULPA High-Efficiency Filters Method: Aerosol Scanning Leak Detection Method (Upstream Dust Generation + Downstream Scanning) II. Preparations Before Testing 1. Instruments and Consumables Aerosol Photometer (with dual channels for upstream\/downstream) Aerosol Generator (heated \/ cooled PAO\/DOP) Isokinetic Sampling Gun, Hose Calibration […]<\/p>","protected":false},"author":3,"featured_media":4864,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[92],"tags":[],"class_list":["post-5139","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-technology"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.bacintl.com\/fr\/wp-json\/wp\/v2\/posts\/5139","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bacintl.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bacintl.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bacintl.com\/fr\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bacintl.com\/fr\/wp-json\/wp\/v2\/comments?post=5139"}],"version-history":[{"count":1,"href":"https:\/\/www.bacintl.com\/fr\/wp-json\/wp\/v2\/posts\/5139\/revisions"}],"predecessor-version":[{"id":5140,"href":"https:\/\/www.bacintl.com\/fr\/wp-json\/wp\/v2\/posts\/5139\/revisions\/5140"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bacintl.com\/fr\/wp-json\/wp\/v2\/media\/4864"}],"wp:attachment":[{"href":"https:\/\/www.bacintl.com\/fr\/wp-json\/wp\/v2\/media?parent=5139"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bacintl.com\/fr\/wp-json\/wp\/v2\/categories?post=5139"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bacintl.com\/fr\/wp-json\/wp\/v2\/tags?post=5139"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}