FIELD CONTROLS CC 2000 User Manual

 

Page 4

O

RGANISM 

A

PPLICATOR

:

  

 

 
An atomizing humidifier spray nozzle mounted at the center of the test duct intake was 
used to distribute the organism into the air stream.  The application flow rate was 0.45 
gallons per hour. 
 
UV D

EVICE

:

 

 

 
A Field Controls UV-Aire air purifier model UV-18 was mounted onto the center of the 
side of the test duct 6 feet from the exit end of the chamber.  The lamp is a UVC 
germicidal lamp (non ozone producing) 18 inches long with a UV output rating of 73 

µ

W/cm

2

 at 1 meter from the lamp. 

 
A

IR 

S

AMPLING 

M

ETHOD

:   

 
An Andersen N6 single stage “bioaerosal” sampler was used to take the air samples and 
distribute the sampled air onto agar medium.  The test medium was Tryptic Soy Agar 
from PathCon, Inc.  The air sampling pump airflow rate was 1 CFM.   

The Anderson sampler method requires corrections to the actual colony counts on the 
plates.  This provides a more accurate  measure of the bacteria per cubic foot of the 
sample air.  In the following tables, the Serratia marcescens Positive Hole Count values 
are the actual plate counts and the Corrected Particle Count values are corrected value 
based on Anderson correction tables. 

 

Figure 1