Comparison Of Dust Collection Efficiency Measurement Methods - Mitsubishi Electric Lossnay LGH-100RX3-CAN Technical Manual

4. Comparison of Dust Collection Efficiency Measurement
Methods
The gravitational, colorimetric and counting methods used for measuring dust collection efficiency each have differing features
and must be used according to the application of the filter.
Test method
Synthetic:
AFI • Dust on standard
Gravitational road in Arizona: 72% measured
method • K-1 carbon black: 25% beforehand
• No.7 cotton lint: 3%
NBS
Colorimetric Atmospheric dust
method
DOP Diameter of dicoctyl- Electrical counting
Counting phthate small drop
method particles: 0.3 µm
Synthetic:
ASHRAE • Regulated air cleaner Dust weight
Gravitational fine particles: 72%
method • Morocco Black: 23% beforehand
• Cotton linter: 5%
ASHRAE
Colorimetric Atmospheric dust
method
Air filter test for air
conditioning set by
Japan Air Cleaning JIS 11 types of dust
Assoc.
(Colorimetric test)
Pre-filter test set
by Japan Air
Cleaning Assoc. JIS 8 types of dust
(Gravitational
test)
Electrostatic air
cleaning device test
set by Japan Air JIS 11 types of dust
Cleaning Assoc.
(Colorimetric test)
Inward flow dust
Test dust
measurement method measurement method
Dust weight
Degree of
contamination of
white filter paper
measurement using
light aimed at DOP
measured
Degree of
contamination of
white filter paper
Degree of
contamination of
white filter paper
Dust weight
measured
beforehand.
Degree of
contamination of
white filter paper
CHAPTER 8
Outward flow dust
indication method
• Filter passage air
volume measured
• Weigh the dust Gravitational ratio
remaining on the
filter and compare
Degree of Comparison of
contamination of contamination of
white filter paper reduction in degree
of contamination
Same as left Counting ratio
• Filter passage air
volume measured
• Weigh the dust Gravitational ratio
remaining on the
filter and compare
Degree of Comparison of
contamination of percentage of
white filter paper reduction in degree
of contamination
Comparison of
Degree of
percentage of
contamination of
reduction in degree
white filter paper
of contamination
• Filter passage air
volume measured
• Weigh the dust Gravitational ratio
remaining on the
filter and compare.
Comparison of
Degree of
percentage of
contamination of
reduction in degree
white filter paper
of contamination
Filtering for Freshness
Efficiency Type of applicable
filters
Synthetic dust filters
Electrostatic dust
percentage of
(for air conditioning)
Absolute filter and
same type of high
efficiency filter
Pre-filter
Filter for air
conditioning
(for coarse dust)
Filter for air
conditioning (for fine
dust) Electrostatic
dust collector
Filter for air
conditioning
Pre-filter
Electrostatic dust
collector
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