IEST-STD-CC1246E Cleanliness Evaluation
Surface and fluid cleanliness is a critical acceptance criterion in aerospace, defense, and precision manufacturing. Verifying compliance with IEST-STD-CC1246E demands accurate particle detection across defined size classes, normalization to a standard reference area, and systematic comparison against target cleanliness levels. Clemex's IEST-STD-CC1246E module automates this entire process — detecting, sizing, and classifying particles on filter membranes and delivering a fully traceable cleanliness report with level determination and fallout analysis.
Stop counting particles by hand. Clemex automates what used to take hours in minutes, with full IEST-STD-CC1246E traceability.
Download IEST-STD-CC1246E Analysis Report Example
Analytical Workflow
From Image Acquisition to Compliant Report
Clemex integrates into your IEST-STD-CC1246E microscopic method workflow, automating the counting and sizing steps that traditionally require a trained analyst at the eyepiece.
Acquire / Load Images
Acquire images directly from the microscope or load existing images of filter membrane samples.
Particle Detection
Clemex detects and segments every particle on the membrane filter across all relevant size classes.
Particle Analysis
Each particle is measured, classified per size range, and normalized to the 0.1 m² reference area defined by the standard.
Generation of Analysis Report
Clemex generates a fully traceable report including cleanliness level determination, fallout analysis, particle size distribution, and UCL/LCL bounds.
Measurement Output
IEST-STD-CC1246E Particle Count & Cleanliness Metrics
Clemex reports every parameter required by IEST-STD-CC1246E. The target cleanliness level is configured at run setup; the system applies the correct limits and normalization automatically.
Particle Count per Size Class
Particle counts reported per size range (5–15 µm, 15–25 µm, 25–50 µm, 50–100 µm, 100–250 µm, and above), as measured and normalized to 0.1 m².
Total Particle Count & Total Particle Area
Cumulative count and total covered area (µm²) of all detected particles, reported both as measured and normalized to the 0.1 m² reference surface.
Percent Area Coverage
Ratio of total particle area to total analyzed area, expressed as a percentage.
Cleanliness Level & Fallout Level
Assigned cleanliness level based on normalized particle counts per size class, with fallout level designation where applicable per IEST-STD-CC1246E.
UCL / LCL Bounds & Particle Size Distribution
Upper and lower confidence limits computed from sample statistics, alongside a cumulative particle size distribution chart for the analyzed membrane.
Module Capabilities
Built for Precision Cleanliness Compliance
Every feature of the IEST-STD-CC1246E module is designed around the requirements of aerospace, defense, and precision manufacturing cleanliness programs.
Multi-Class Size Distribution
Particles are counted and reported across all IEST-STD-CC1246E size classes from 5 µm through 1250 µm and over, enabling complete cleanliness level determination in a single automated run.
Fully Automated Membrane Scanning
Motorized stage integration scans the entire effective filtration area in a defined raster pattern, ensuring complete surface coverage and logged scan confirmation per run.
Normalization to 0.1 m²
All particle counts are automatically normalized to the 0.1 m² reference area required by IEST-STD-CC1246E, regardless of the actual membrane area analyzed.
Traceable Compliance Report
Every report includes sample ID, calibration, magnification, analyst, field count, particle counts per size class, area coverage, cleanliness level, UCL/LCL, size distribution chart, and largest particle image.
Configurable Target Level
The target cleanliness level and fallout level are set at run configuration. The module automatically compares measured particle counts against level-specific limits and flags overages per size class.
Dedicated to Aerospace & Precision Manufacturing
The IEST-STD-CC1246E module is purpose-built for cleanliness programs in aerospace, defense, hydraulic systems, and precision component manufacturing, designed to integrate into existing QC workflows.
Frequently Asked Questions
What is IEST-STD-CC1246E and what does it define?
IEST-STD-CC1246E is the Institute of Environmental Sciences and Technology standard defining cleanliness levels for products and components based on particle contamination. It specifies how to measure, classify, and report particles collected on a filter membrane, normalized to a reference area of 0.1 m². The standard assigns a numerical cleanliness level based on the maximum allowable particle count per size class, and optionally a fallout level for contamination due to particle deposition. Clemex automates the entire measurement and reporting workflow to that standard.
It defines the particle count limits that determine whether a component or surface passes its cleanliness level.
How are cleanliness levels determined in the Clemex module?
The operator selects a target cleanliness level at run setup. After membrane scanning and particle analysis, Clemex normalizes all particle counts to the 0.1 m² reference surface and compares them against the maximum count limits for each size class defined by the configured level. Any size class that exceeds its limit is flagged as over-limit. The overall cleanliness level assigned to the sample corresponds to the most restrictive size class result. UCL and LCL bounds are also computed and reported.
The level is assigned automatically from normalized counts versus standard limits.
What size classes does the module report?
The Clemex IEST-STD-CC1246E module reports particle counts across all ten standard size ranges: 5–15 µm, 15–25 µm, 25–50 µm, 50–100 µm, 100–250 µm, 250–500 µm, 500–750 µm, 750–1000 µm, 1000–1250 µm, and 1250 µm and over. Each size class reports counts as measured and normalized to 0.1 m², with maximum allowable count and fallout limit shown alongside. The largest particle detected is identified and its image is captured in the report.
Ten size classes from 5 µm through 1250 µm and over, all reported per run.
What does normalization to 0.1 m² mean in practice?
Because the actual area of membrane analyzed in any given test is smaller than 0.1 m², IEST-STD-CC1246E requires that measured particle counts be mathematically scaled to the 0.1 m² reference area to enable meaningful comparison between tests and against standard limits. Clemex computes this normalization factor automatically from the calibrated scan area and applies it to all size class counts before level determination. The as-measured counts and the normalized counts are both reported for traceability.
Normalized counts enable direct, reproducible comparison against IEST limits.
Can Clemex handle both surface extraction and fluid sample analyses?
Yes. IEST-STD-CC1246E applies to particles collected by any approved extraction or flush method, including component surface extraction, fluid sampling, and deposition testing. Clemex analyzes the membrane filter regardless of how particles were collected. Sample identification fields in the report capture the collection method, sample size, and operating conditions, ensuring the analysis record reflects the full context of each test.
Method-agnostic: surface extraction, fluid flush, or deposition test.
How long does a typical IEST-STD-CC1246E analysis take compared to manual counting?
Manual counting of a membrane across ten size classes typically takes 45 to over 90 minutes, with significant operator fatigue affecting consistency in later fields. Clemex completes the full motorized membrane scan and automated count in approximately 10 to 20 minutes per membrane depending on scan area and particle loading. The analyst is free for other tasks while the system runs, and results are generated without subjective judgment at the eyepiece. For programs testing multiple samples per batch, the time savings compound significantly.
10 to 20 minutes automated vs. 45 to 90 minutes manual, with no analyst fatigue.
Ready to Automate Your IEST-STD-CC1246E Testing?
Talk to a Clemex specialist and see the module running on representative sample images.
