Image Source |
Non Viable
Particle Count
The Non Viable
Particle Count particle count test shall be performed by qualified and
trained person only.
Measuring
instrument being used shall be calibrated with reference to NPL/NABL traceable
reference standard.
Ensure that the
sampling locations are evenly distributed throughout the area of the clean
room.
Sampling location
shall be identified as per given table.
Sr. No
|
Area of cleanroom (m2) Less than or
equal to
|
Min number of sample locations to be tested NL
|
Sr. No
|
Area of cleanroom (m2) Less than or
equal to
|
Min number of sample locations to be tested NL
|
1.
|
2
|
1
|
15.
|
76
|
15
|
2.
|
4
|
2
|
16.
|
104
|
16
|
3.
|
6
|
3
|
17.
|
108
|
17
|
4.
|
8
|
4
|
18.
|
116
|
18
|
5.
|
10
|
5
|
19.
|
148
|
19
|
6.
|
24
|
6
|
20.
|
156
|
20
|
7.
|
28
|
7
|
21.
|
192
|
21
|
8.
|
32
|
8
|
22.
|
232
|
22
|
9.
|
36
|
9
|
23.
|
276
|
23
|
10.
|
52
|
10
|
24.
|
352
|
24
|
11.
|
56
|
11
|
25.
|
436
|
25
|
12.
|
64
|
12
|
26.
|
500
|
26
|
13.
|
68
|
13
|
27.
|
1000
|
27
|
14.
|
72
|
14
|
28.
|
>1000
|
Equation A.1
|
Equation A.1: N =
27 [A/1000]
The volume sampled
at each location shall be at least 2 litres, with a minimum sampling time at
each location of 1 minute. The sampling probe shall be positioned at working
level and air flow probe shall be directed vertically upward.
Where only one
sampling location is determined, minimum of location shall be considered.
Acceptance
Criteria: All the clean rooms should comply as per the designed class at rest
as per ISO 14644-1 & WHO TRS 961.
Your blog is very useful for those who are searching for this kind of information, this information is a solution for those who are confused about it. Thanks for sharing this blog with us.heat recovery ventilation cost Ireland
ReplyDelete