SKC 225-70A IOM Inhalable Dust Sampler with MultiDust Foam Discs - Manual (Page 4)

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IOM Stainless Steel Cassett e
Use stainless steel cassett e only.
Autoclave stainless steel cassett e up to 392 F (200 C).
Reminder: Use powder-free gloves and forceps to insert the fi lter and foam into the
cassett e (see Filter Cassett e: Opening, Installing Filter, and Closing). Users may wish to
use sterile gloves and forceps depending on the contaminant of interest.
Storage Requirements for IOM MultiDust Foam Discs
IOM MultiDust Foam Discs are sensitive to heat, humidity, and ultraviolet light.
The foams must be stored in the supplied packaging (including the resealable bag).
Keep in a cool, dry place away from direct sunlight. SKC recommends checking the
condition of the foams before use. Note that the expiration date on the package is
subject to correct storage as detailed above.
General Weighing Guidelines
• The plastic cassett e with fi lter and MultiDust Foam Disc (if used) should be
equilibrated overnight in a balance room under controlled humidity conditions
and weighed. Maintain a stable humidity level in the balance room. A stainless
steel cassett e with fi lter may be desiccated.
• Before pre and post-weighing, wipe the external surface of the sampler with a
clean lint-free paper, cloth, or soft brush.
• For inhalable only, pre and post-weigh cassett e with fi lter as a single unit. For
inhalable and respirable, pre and post-weigh fi lter, foam, and cassett e together
fi rst for inhalable result and then fi lter and cassett e bott om together for respirable
result.
• Field blanks can be used to correct weights when using plastic cassett es at low
fi lter loadings. See Sample Blanks on page 9.
• The IOM cassett e assembled with fi lter or the fi lter alone should be weighed
on a fi ve-fi gure forced balance. Allow the cassett e three-and-a-half minutes to
stabilize before taking a reading. The same balance should be used for both pre
and post-weighing procedures.
Pre and Post-weighing for Specifi c Fractions
Particle Size Collected Pre-weigh Components Post-weigh Components
Inhalable only Filter and cassette together Filter and cassette together
Respirable (#1) and
Inhalable (#2)
#1 Filter and cassette
bottom together
#2 Filter, foam, and cassette
together
#1 Filter and cassette
bottom together
#2 Filter, foam, and cassette
together