DETAILS OF TEST METHODS FOR PERFORMANCE
EVALUATION

  • Visual / Dimensional Checks
    For workmanship, overall dimensions, separator or media damage. All Filters are visually checked and certified for further testing. If any defect is observed, repairing is done and Filter is reoffered for checks.
  • Flow vs. Pressure Drop Tests
    Each Filter is tested for initial pressure drop at rated flow.
  • Leak Testing ( Using Photometer )
    Photometer is based on light scattering principle. It is used for scanning the Filters for leakage. The readings on the meter directly indicate the percent of penetration with an accuracy upto 0.01%.
  • Particle Count Efficiency ( Using LASER Particle Counter And Aerosol generator )
    DOP
    from Aerosol generator mixed with filtered air at rated flow is used as medium of testing. Particle analysis is done by particle counter having 0.3 micron sensitivity. Sampling is done at upstream and downstream sides for 1 CFM sample and the efficiency is calculated.

AEROSOL DETECTION

  • PARTICLE COUNTER
    Laser based Aerosol particle counter.
    CLIMET  Make, Model; CI 500
    Particle Size measured : 0.3, 0.5, 1, 5, 10, 25 micron
      Flow rate : 1 CFM, FEDERAL STANDARD 209 E  calculation 
    Printer Built-in
    It operates on light scattering principle utilizing an elliptical mirror collection system and a 50mw solid state laser diode. The scattered light is detected by a solid state photo detector. The highly efficient optical system and detection electronics provide the means for this instrument to correctly size and count 0.3 micron particle based on NIST traceable method.
    Minimum Size Sensitivity : 0.3 micron
    Maximum Concentration Limit : 10 Lac particle / Cubic Ft
  • PHOTOMETER
    ATI Make, Model TDA-2E
    When air or gas is drawn through the scattering chamber by the vacuum pump, any particulate matter in the sample will pass through the focal point of the cone of light. This will cause light to be scattered forward into the dark area. The phototube, which has been exposed to darkness upto now, is activated by the forward scattered light and sends a signal to the amplifier. The amplifier augments the signal linearly and sends it to the PANEL METER plus the SIGNAL 0-1 VDC and EXT METER jacks.
    Minimum Size Sensitivity 0.1 Micron
    Maximum Concentration Limit : 100 Micrograms per litre Aerosol.

         


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