Title: counting of airborne particle by using particle counter.
1.0 OBJECTIVE:
To lay down a procedure for counting of
airborne particle by using particle counter.
2.0 SCOPE:
This SOP shall be applicable to Q.C
Dept.
3.0 RESPONSIBILITY:
3.1
Doing: Q.C Analyst.
3.2
Checking: Q.C-Manager.
4.0 ACCOUNTABILITY:
4.1
Head of the Q.C Department.
5.0 MATERIAL AND EQUIPMENT:
5.1
Particle counter.
6.0 PROCEDURE:
6.1
Make sure that the instrument is clean.
6.2
Operate the apparatus according to SOP.
6.3
Remove protective cap from the inlet tube expose it to the
specified room.
6.4
The count stops automatically after 35 seconds.
6.5
When the count is complete, the total number of particles
counted during the count time displays.
6.6
Check results and note down readings on given Annexure-1 of
both air quality and particulate matter in weight results.
6.7
Switch “ON” the air purifier for 20 minutes to clean the bad
air.
6.8
Perform test again after use of air purifier to check the
air quality.
6.9
Operate the apparatus according to SOP.
6.10 Results will show of both air quality and
particulate matter in weight. Note it down in annexure-1.
6.11 And compare it with the standards as
shown in Annexure-2 & 3.
6.12 After use power it off.
7.0 REVISION LOG:
|
Revision
No. |
Effective
Date |
Reason
|
|
00 |
|
New SOP |
8.0 REFERENCES:
8.1 Not Applicable.
9.0 ANNEXURES:
Annexure
1: Observations of particles counting by
using particle counter.
Annexure
2: Cleanroom Standards.
Annexure 2: Air quality Chart.
Annexure: 1
Observations of particles counting by
using particle counter
|
Observations of Particles counting by
using particle counter
Quality of air:
Particulate matter in weight:
Remarks:
____________________________________________________________ |
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Annexure:
2
Cleanroom
Standards
|
Class
|
Maximum
particles/ft3 |
ISO
equivalent |
||||
|
≥0.1μm |
≥0.2μm |
≥0.3μm |
≥0.5μm |
≥5μm |
||
|
1 |
35 |
7.5 |
3 |
1 |
0.007 |
ISO3 |
|
10 |
350 |
75 |
30 |
10 |
0.07 |
ISO4 |
|
100 |
3500 |
750 |
300 |
100 |
0.7 |
ISO5 |
|
1000 |
35000 |
7500 |
3000 |
1000 |
7 |
ISO6 |
|
10000 |
350000 |
75000 |
30000 |
10000 |
70 |
ISO7 |
|
100000 |
3.5 x 106 |
750000 |
300000 |
100000 |
700 |
ISO8 |
Conversion
to metric units can be had multiplying the number of allowed particles with 35
to get max particles/m3.
Annexure:
3
Air
quality Chart
|
Category
|
PM10 |
PM2.5 |
|
Good |
0-50 |
0-30 |
|
Satisfactory |
51-100 |
31-60 |
|
Moderately polluted |
101-250 |
61-90 |
|
Poor |
251-350 |
91-120 |
|
Very poor |
351-430 |
121-250 |
|
Severe |
430+ |
250+ |
