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Introduction
Calculation of Particulate Mass on Filter Tape
β
=
n
1-4
Model 5030 SHARP Monitor Instruction Manual
The theoretical calibration factor (
A
=
F
μ
cal
/
where;
A
μ/ρ
For continuous beta compensation during changing temperature and
pressure, the following equation is applied:
(
β
×
−
1
[(
k
R
T
where;
β
=
n
β
=
R
Δ
T
=
2
Δ
P2 =
Δ
P3 =
k
=
T2
k
=
P2
k
=
P3
2
μ
=
≈
*
mg
, 6
600
ρ
0
3 .
= filter spot area (cm
= mass attenuation coefficient for
Δ
−
*
T
)
(
k
2
2
compensated beta count [1/s],
raw beta count [1/s],
T
– T
change in sample temperature since filter change (
2
2o,
P2 – P
change in vacuum under filter tape since filter change (hPa),
20 ,
P3 – P3
change in barometric pressure since filter change (hPa),
0,
temperature coefficient,
sub-filter pressure coefficient
barometric pressure coefficient
) is given by:
F
cal
g
2
), and
14
C [cm²/mg]
Δ
+
*
P
)
(
k
P
2
2
)
Δ
*
P
)]
p
3
3
o
C)
Thermo Fisher Scientific
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