“
SAS Super IAQ” Rev. 1 Pg.
17
ENGLISH
4.8
ADJUSTABLE “CONTACT PLATE” HOLDERS
The SAS SUPER IAQ air samplers are designed for use
with standard “Contact Plates”. The plate holders are
adjustable to allow different brands of Contact Plate to be
fitted.
Adjustable plate holders in the sampler head allow the
operator to use contact plates from many sources without
concern for slight differences in plate size.
4.9
SANITATION OF THE AIR SAMPLER
4.10
“CONTACT PLATE” HANDLING
(a)
Disinfect the cover of the air sampler at the beginning of each sampling program treating
the inside and the outside part with a disinfecting alcohol wipe or swab.
(b)
The cover with its protective plastic lid can be autoclaved at 121°C for 15 minutes. If this
procedure is to be repeated regularly, a s/s head is recommended. It is therefore useful to
have available several heads ready to use. Alternatively, the unit can be sanitised using a
disinfecting aerosol at about 30 cm from the head when the fan is running. Thirty seconds
are sufficient to disinfect the air path.
(c)
Remove the cover of the air sampler by unscrewing it, holding the edge of the cover.
Avoid touching the inside and outside of the drilled area.
(d)
Insert a closed filled “Contact Plate” into the retaining slots and then remove its lid.
Avoid contamination from droplets and aerosol infection.
(e)
Replace the sampling head and start the air aspiration cycle. At the end of the cycle,
unscrew the sampling head, replace the “Contact Plate” lid and remove the “Contact
Plate”.
(f)
Be sure each “Contact Plate” is identified with the appropriate sample data.
(g)
Incubate the “Contact Plate” for the specified time at the appropriate temperature.
(h)
At the end of incubation count the number of visible organisms (C.F.U.) and relate this
number to the volume of air sampled.