Description
The Palas LFT 1000 is a latest generation manual scanning test system for testing HEPA & ULPA filters in a comparable manner to ISO 29463-4 Annex B with a photometer. The Palas LFT 1000 combines the requirements of ISO 29463-4 Annex B for filters of class ISO 35 H to ISO 45H with a simple manual test procedure. The system uses the appropriate software to report leakage points quickly and easily. To ensure filter quality, ISO 29463-1 requires that all HEPA / ULPA filters with an efficiency of 99.95% or higher (ISO 35H/H13) be tested for the following:
- Local efficiency according to ISO 29463-4
- Overall efficiency according to ISO 29463-5
Operation Principle
The test system consists of the following components:
- Supply air duct with volume flow measurement and raw gas sampling
- Horizontal filter holder (adapter for different filter sizes)
- Aerosol generator
- Sampling and integrated photometer for manual scanning by hand in the clean gas
- Data evaluation with test protocol on a Windows interface
- First, the aspirated air flows through the built-in filter with a defined volume flow. The particle concentration is measured on the raw gas side with a photometer
- The pressure drop is manually recorded by scanning over the filter surface
- The operator moves the sampling probe over the clean gas side of the filter and thus scans the local emission in the clean gas utilizing the photometer. Leakage points are thus detected quickly and easily
- After successful testing, the test report is generated
Key Benefits
- Quick manual scanning with a Photometer
- Test report
- Clear leak detection
- Easy installation of filter elements
- Adapters for various filter dimensions
- Up gradable to an automatic scanning system
- Use of components for ISO 14644 In-situ integrity testing
Applications
- Classification of HEPA / ULPA filters
Accessories
- Aerosol Generation – We recommend the Palas PLG 2100H with a Laskin nozzle for the greatest possible consistency in aerosol generation
- Particle Measurement – We recommend an aerosol photometer with a 28 LPM flow rate
- Scan Nozzle – Specially designed according to ISO 29463 for scanning speeds up to 5cm/s
- Scan Unit – Manual scan
