Page
Page 8-6
8-6
LASAIR
LASAIR II
II Operator’s
Operator’s Manual
Manual
Chapter 8: Statistics Mode
Chapter 8: Statistics Mode
BS-5295 Standard
BS-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 particle
LASAIR 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 0.4
The 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 rate
Liters 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 requires
5295 calculations. The standard also requires
sa
sam
mp
ple
les
s o
of
f 27
27 L
Lite
iterrss
. 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 m
Liters (.0274 m
3
3
).
).
In BS-5295 mode, the statistics summary screen and statistics location summary
In BS-5295 mode, the statistics summary screen and statistics location summary
only show data for the smallest particle channel. Data for all relevant channels
only 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, you
used. That is, you
may not increase the minimum number of loc
may 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 Standards
B S I Standards
389 Chiswick High Road
389 Chiswick High Road
London W44 AL
London W44 AL
T
Tel: 0181 996
el: 0181 996 9000
9000
Fax: 0180 996 7400
Fax: 0180 996 7400
e-mail: [email protected]
e-mail: [email protected]
Table 8-5: BS 5295 Sample requirements
Table 8-5: BS 5295 Sample requirements
Maximum Particles Per M
Maximum Particles Per M
3
3
C
Clla
assss
0
0..3
3
µ
µ
0.5
0.5
µ
µ
5.0
5.0
µ
µ
10.0
10.0
µ
µ
25.0
25.0
µ
µ
Area (M
Area (M
2
2
)) Samples
Samples
C
C
1
10
00
0
3
35
5
0
0
1
10
0
20
20
D
D
1
10
00
00
0
3
35
50
0
0
0
1
10
0
10
10
E
E
1
10
00
00
00
0
3
35
50
00
0
0
0
1
10
0
5
5
F
F
3
35
50
00
0
0
0
2
25
5
5
5
G
G
1
10
00
00
00
00
0
3
35
50
00
00
0
2
20
00
0
0
0
2
25
5
5
5
H
H
3
35
50
00
00
0
2
20
00
0
0
0
2
25
5
1
1
J
J
3
35
50
00
00
00
0
2
20
00
00
0
4
45
50
0
0
0
2
25
5
1
1
K
K
3
35
50
00
00
00
00
0
2
20
00
00
00
0
4
45
50
00
0
5
50
00
0
5
50
0
1
1
L
L
2
20
00
00
00
00
0
4
45
50
00
00
0
5
50
00
00
0
5
50
0
1
1
M
M
4
45
50
00
00
00
0
5
50
00
00
00
0
5
50
0
1
1