Description
The Palas LFT 2000 is a latest generation manual scanning test system for testing HEPA & ULPA filters in a comparable manner to ISO 29463-4 Annex F with a particle counter. The Palas LFT 2000 combines the requirements of ISO 29463-4 Annex F for Class 35 H filters with a simple manual test procedure. The system manually detects possible leakage points easily and quickly with the appropriate software. The output of the test report is for local filter efficiency as well as for leak detection.
- 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 and dilution on the raw gas side
- Sampling and integrated particle counter for manual scanning by hand in the clean gas
- Data evaluation with test protocol on a Windows interface
First, the intake air flows through the built-in filter at a defined volume flow rate. In the process, the particle counter measures the particle concentration and size on the raw gas side. Subsequently, the pressure drop is measured with a scan over the filter surface. At the outlet side, the operator guides the sampling probe across the downstream side of the filter. Thus, he scans the local emission and size of the particles in the clean gas using the particle counter. Leakage points are thus detected quickly and easily. The test report is generated after successful testing of the local filter efficiency.
Key Benefits
- Quick manual scanning with an optical particle counter
- 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
- Filter test comparable to ISO 29463-4 Annex F
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 optical particle counter with a 28 LPM flow rate, measurement range selectable either from 0.1µm or 0.3µm
- Scan Nozzle – Specially designed according to ISO 29463 for scanning speeds up to 5cm/s
- Scan Unit – Manual scan
