Automatic leakage scantest for HEPA/ULPA Filter in accordance with ISO 29463-4 and -5
LFT 1000 - 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 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 recorded manually 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.
LFT 2000 - 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 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.
LFT 3000 - 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
Scanning system with sampling and integrated particle counters
Control and evaluation unit including software on Windows surface
First, the intake air flows through the built-in filter at a defined volume flow.
During this process, the particle counter measures the particle concentration and size on the raw gas side. One advantage of the LFT system is that the test parameters for the test object are automatically calculated from the specifications of the filter class and the associated volume flow.
The settings and the sequence are stored and can be recalled at any time for repeat measurements.
Subsequently, the pressure drop is recorded by scanning over the filter surface. The scan system, which is installed on the outlet side, uses the particle counter to measure the local emission and size of the particles in the clean gas.
From this, it then calculates the local filter efficiency. The result: leaks are detected quickly and easily.
