Clean Room Particle Counter User Directions

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

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:

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.)	Results	Notes
Laminar hood in LDS	4:00-4:20pm	CALC	10	2	av.=0,STD=0 for all sizes	Device is not calibrated
Laminar hood in LDS	4:25pm	CALC	5 10	av.=0,STD=0 for all sizes	Device is not calibrated