Page Page 8-6 8-6 LASAIR LASAIR II II Operator’s Operator’s ManualManual
Chapter 8: Statistics ModeChapter 8: Statistics Mode
BS-5295 StandardBS-5295 Standard
The document, BS 5295 (1989), was used when designing the BS 5295 module,The document, BS 5295 (1989), was used when designing the BS 5295 module,
and only the classes specified in and only the classes specified in the document’s tables have been implemented.the document’s tables have been implemented.
LASAIR II does not support intermediate class sizes or intermediate particleLASAIR II does not support intermediate class sizes or intermediate particle
sizes.sizes.
The BS 5295 standard specifies a particle counter with a sample flow rate of 0.4The BS 5295 standard specifies a particle counter with a sample flow rate of 0.4
Liters per second ±5% (24 Liters per minute). The LASAIR II has a flow rateLiters per second ±5% (24 Liters per minute). The LASAIR II has a flow rate
of about 0.471 liters per second. It is of about 0.471 liters per second. It is common practice to use 1 CFM for common practice to use 1 CFM for BS-BS-
5295 calculations. The standard also requires5295 calculations. The standard also requiressasammppleles s oof f 27 27 LLiteiterrss. In BS-5295. In BS-5295
mode, the min/max sample volume is 27.4 mode, the min/max sample volume is 27.4 Liters (.0274 mLiters (.0274 m
33
).).
In BS-5295 mode, the statistics summary screen and statistics location summaryIn BS-5295 mode, the statistics summary screen and statistics location summary
only show data for the smallest particle channel. Data for all relevant channelsonly show data for the smallest particle channel. Data for all relevant channels
is shown on the printed report.is shown on the printed report.
Also, only the minimum number of sample locations may be Also, only the minimum number of sample locations may be used. That is, youused. That is, you
may not increase the minimum number of locmay not increase the minimum number of locations.ations.
Use the following sources for more information about the BS-5296 Use the following sources for more information about the BS-5296 standard:standard:
B S I StandardsB S I Standards
389 Chiswick High Road389 Chiswick High Road
London W44 ALLondon W44 AL
TTel: 0181 996 el: 0181 996 90009000
Fax: 0180 996 7400Fax: 0180 996 7400
e-mail: info@bsi.org.uke-mail: info@bsi.org.uk
Table 8-5: BS 5295 Sample requirementsTable 8-5: BS 5295 Sample requirements
Maximum Particles Per MMaximum Particles Per M
33
CCllaassss 00..33
µµ
0.50.5
µµ
5.05.0
µµ
10.010.0
µµ
25.025.0
µµ
Area (MArea (M
22
))
SamplesSamples
CC
110000 3355 00 1100
2020
DD 11000000 335500 00 1100
1010
EE
1100000000 33550000 00 1100
55
FF
33550000 00 2255
55
GG 110000000000 3355000000 220000 00 2255
55
HH 3355000000 220000 00 2255
11
JJ
335500000000 22000000 445500 00 2255
11
KK 33550000000000 2200000000 44550000 550000 5500
11
LL 220000000000 4455000000 55000000 5500
11
MM
445500000000 5500000000 5500
11
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