Labconco Protector Filtered Glove Box - Manual (Page 11)

Chapter 2: Prerequisites
Product Service 1-800-522-7658 7
Protector HEPA-Filtered Glove Box Particle Testing under Positive Pressure
0
314
115
83
56
23
12
25
13
6
0
269
98
17
4 3 2 0 0 2 2 0 0
50
100
150
200
250
300
350
400
450
500
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Time (Minutes)
N
u
mber of Particles
(Per Cubic Me
ter P
e
r
M
inut
e)
> 0.3 Micron
> 0.5 Micron
Airflow Testing Performed at 42 CFM
with Glove Box Under Positive Pressure.
NOTE: Ambient Air Baseline Particle Count at 1 Minute
32151 Particles measuring 0.3 Micron detected within 1 Minute.
1074 Particles measuring 0.5 Micron detected within 1 Minute.
ISO Class 3 Definition
Airborne particulate cleanliness inside any clean air glove box or enclosure is
designated by ISO Class 3, which is equivalent to 35 particles 0.5 µm or
larger per cubic meter of air per minute as defined by ISO Standard 14644-1.
ISO Class 3 cleanliness is illustrated in the table below and is equivalent to
Class 1 air conditions as defined by Federal Standard 209E or l particle 0.5
µm or larger per cubic foot of air per minute.
Table 1-1 Selected airborne particulate cleanliness classes for cleanrooms and clean zones.
ISO
classification
number (N)
Maximum concentration limits (particles/m 3 of air/minute) for particles equal to
and larger than the considered sizes shown below (concentration limits are
calculated in accordance with 3.2 of Standard 14644-1)
0.1 µm 0.2 µm 0.3 µm 0.5 µm 1 µm 5 µm
ISO Class 1 10 2
ISO Class 2 100 24 10 4
ISO Class 3 1 000 237 102 35 8
ISO Class 4 10 000 2 370 1 020 352 83
ISO Class 5 100 000 23 700 10 200 3 520 832 29
ISO Class 6 1 000 000 237 000 102 000 35 200 8 320 293
ISO Class 7 352 000 83 200 2 930
ISO Class 8 3 520 000 832 000 29 300
ISO Class 9 35 200 000 8 320 000 293 000
Table 2-1 ISO Classification Number (N)