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

Apparatus:

 

Room:

 

Date:

 

Time:

 

Quality of air:

Sr.#

Sample time (sec)

Particles (PCS/L)

Temperature

(oC)

Humidity

(%)

Quality of air

0.3μm

2.5μm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Particulate matter in weight:

Sr.#

Sample time (sec)

Particles (μg/m3)

Temperature

(oC)

Humidity

(%)

Quality of air

PM2.5

PM10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Remarks: ____________________________________________________________


                                                    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+


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