OF TEST METHODS FOR PERFORMANCE
- Visual /
» 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
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%.
Count Efficiency ( Using LASER Particle Counter And Aerosol
» 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.
» 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
» 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.