Particle Measuring Systems LASAIR II 550L Operator's Manual

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LLAASSAAIIR R III I OOppeerraattoorr’’s s MMaannuuaall PPaagge e 11--11
Chapter 1Chapter 1
Getting StartedGetting Started
Product OverviewProduct Overview
The LASAIR II is an airborne-particle counter designed for either mobile orThe LASAIR II is an airborne-particle counter designed for either mobile or
dedicated use. The sizing channel dedicated use. The sizing channel threshold and the sample flow rate vary withthreshold and the sample flow rate vary with
the particular model. See the chathe particular model. See the chart below for each model’s channel thresholdsrt below for each model’s channel thresholds
and flow rates.and flow rates.
Counting Counting TTechniqueechnique
When the LASAIR II begins sampling, the internal pump When the LASAIR II begins sampling, the internal pump creates a vacuum tocreates a vacuum to
pull air into pull air into the sample inlet. the sample inlet. The sample flThe sample flow is controlled ow is controlled to maintain 1 to maintain 1 CFMCFM
(50 LPM for the 350L and 55(50 LPM for the 350L and 550L) of airflow through the sampler. A variance of0L) of airflow through the sampler. A variance of
only +5% in airflow is allowed in a valid sample.only +5% in airflow is allowed in a valid sample.
Air moves from the sample inlet through the sample chAir moves from the sample inlet through the sample chamber. A laser beam isamber. A laser beam is
projected through the sample chamber so that any particles in the sample willprojected through the sample chamber so that any particles in the sample will
scatter the light. The scattered light enscatter the light. The scattered light energy is picked up by the ergy is picked up by the collecting opticscollecting optics
and converted to a voltage pulse with the amplitude of the voltage pulseand converted to a voltage pulse with the amplitude of the voltage pulse
corresponding to the size of the particle.corresponding to the size of the particle.
The incoming particle data is allocated according to size to the appropriateThe incoming particle data is allocated according to size to the appropriate
channel. Both differential and cumulative counts are displayed.channel. Both differential and cumulative counts are displayed.
MMooddeel l NNoo.. CChhaannnneel l TThhrreesshhoollddss FFlloow w RRaattee AAvvaaiillaabbllee
335500LL 00..33, , 00..55, , 11..00, , 55..00, , 1100..00, , 2255..00 µµmm 11..777 7 ccffm m ((550 0 LLPPMM)) YYeess
555500L L 00..55, , 11..00, , 22..00, , 55..00, , 1100..00, , 2255..00 µµmm 11..777 7 ccffm m ((550 0 LLPPMM)) YYeess
331100AA 00..33, , 00..55, , 11..00, , 55..00, , 1100..00, , 2255..00 µµmm 11..0 0 ccffm m ((2288..3 3 LLPPMM)) YYeess
331100BB 00..33, , 00..55, , 11..00, , 33..00, , 55..00, , 1100..00 µµmm 11..0 0 ccffm m ((2288..3 3 LLPPMM)) YYeess
551100AA 00..55, , 11..00, , 22..00, , 55..00, , 1100..00, , 2255..00 µµmm 11..0 0 ccffm m ((2288..3 3 LLPPMM)) YYeess
331100 00..33, , 00..55, , 00..77, , 11..00, , 55..00, , 1100..00 µµmm 11..0 0 ccffm m ((2288..3 3 LLPPMM)) NNoo
332255 00..33, , 00..55, , 11..00, , 55..00, , 1100..00, , 2255..00 µµmm 11..0 0 ccffm m ((2288..3 3 LLPPMM)) NNoo
551100 00..55, , 00..77, , 11..00, , 22..00, , 55..00, , 1100..00 µµmm 11..0 0 ccffm m ((2288..3 3 LLPPMM)) NNoo
552255 00..55, , 00..77, , 11..00, , 55..00, , 1100..00, , 2255..00 µµmm 11..0 0 ccffm m ((2288..3 3 LLPPMM)) NNoo

Particle Measuring Systems LASAIR II 550L Specifications

General

Brand	Particle Measuring Systems
Model	LASAIR II 550L
Category	Measuring Instruments
Language	English