Difference between revisions of "Clean Room Particle Counter User Directions"

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| Location || Time and Date || Measuring Mode || NO. of runs || Time Period per run (Min.)||  0.3, 0.5, 5 <math> \mu m <math\>  || Notes
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| Location || Time and Date || Measuring Mode || NO. of runs || Time Period per run (Min.)||  0.3, 0.5, 5 <math> \mu m <math/>  || Notes
 
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|  LDS || 5:05-5:30pm || CALC || 5 || 5 || 0.3 av.=10 CNT,STD=20, 0.5 av.=1 CNT,STD=1 and zeros for 5 || filter is used, the device is zero calibrated, there are some counts in the first run but I ignored them (cleaning) sisnce there is not any counts observed after the first one.  
 
|  LDS || 5:05-5:30pm || CALC || 5 || 5 || 0.3 av.=10 CNT,STD=20, 0.5 av.=1 CNT,STD=1 and zeros for 5 || filter is used, the device is zero calibrated, there are some counts in the first run but I ignored them (cleaning) sisnce there is not any counts observed after the first one.  

Revision as of 23:10, 26 July 2011

Caution for Extremely Long Measurement Periods

The instrument is unsuitable for continuous measurements for a prolonged period. It may hasten deterioration of the light source and inner pump, and require maintenance in a shorter interval.

Sampling Environment

The instrument is designed for use in clean rooms or clean environments where the concentration is below the maximum measurable concentration of 2,000,000 particles/cf. Using the instrument in a high temperature/humidity environment or in an environment with high particle concentration may cause damage to the instrument or shorten the maintenance interval.

The Counter Components

F m parts.png


Measuring modes
REPEAT Mode

Suitable for repeated measurement at a same location.

SINGLE Mode

Measurements stops automatically when the time has been elapsed.

CONT (Continuous) Mode

Suitable for measurement of random time.

CALC (Calculation) Mode

Processes results of repeated measurements measured by REPEAT, SINGLE and CONT modes. Only the calculation result of average,maximum, minimum, and standard deviation will be stored, and detail data from the repeated measurements will NOT be stored.

ISO>4 Mode

Suitable for cleanliness assessment of ISO Class 5 to 9.

REMOTE Mode

Measurement is controlled externally by using the software supplied with the instrument.


Sample and INT time

The relationship between the sampling time and the INT time that INT time includes the sampling time and suspension time as shown below:

Sample int time.png


The laminar hood were tested using the particle counter above, the results are summarized by the following table:


Location Time and Date Measuring Mode NO. of runs Time Period per run (Min.) 0.3, 0.5, 5 <math> \mu m [math][/math] Notes
LDS 5:05-5:30pm CALC 5 5 0.3 av.=10 CNT,STD=20, 0.5 av.=1 CNT,STD=1 and zeros for 5 filter is used, the device is zero calibrated, there are some counts in the first run but I ignored them (cleaning) sisnce there is not any counts observed after the first one.
LDS 3-4pm 7/26/11 CALC 10 5 for 0.3 av.=528100 CNT,STD=451 , 0.5 av.=41970 std=4107, 5um av=451 std =218 using the isokinetic probe
Laminar hood in LDS 4:00-4:20pm CALC 10 2 av.=0 CNT,STD=0 for all sizes Device is not calibrated, fan on max. speed
Laminar hood in LDS 4:25pm CALC 5 10 and zero values for the other sizes Device is not calibrated , fan on max. speed