Nextteq VeriFit Irritant Smoke Generators for Respirator Fit Testing - Manual (Page 23)

Page 20 of 24
VeriFit Irritant Smoke Generators Manual
Toll free: 877-312-2333 / Toll free: 877-312-2444 www.nextteq.com
PN 50811300-340N Rev F 5/09
Operating Instructions
11. A test subject’s sensitivity to irritant smoke varies based upon size,
weight, heredity, age, health, and other factors. Some test subjects
may respond to a greater degree than others to irritant smoke.
During the Sensitivity Check, the administrator shall consider
the test subject’s sensitivity and be careful to generate a small,
dilute, weak stream of smoke that is the absolute minimum
concentration of irritant smoke necessary to elicit a response from
the test subject.
12. Do not re-expose the test subject to irritant smoke until the test
subject specifically and expressly confirms that all effects from
the prior exposure to irritant smoke have ceased.
13. During the Sensitivity Check, do not place the open end of the
smoke generator closer than 36 inches from the test subject’s face.
14. This product(s) is designed for qualitative respiratory fit testing
in ambient atmospheres of 40% relative humidity to 90% relative
humidity. Do not use this product(s) in atmospheres of less than
40% relative humidity.
15. Test only one test subject at a time.
C. Smoke Generation and Flow Rate
1. Ensure you are in compliance with all of the previous steps,
which are required prior to smoke generation.
2. The VeriFit Irritant Smoke Generator has an internal volume of
approximately 8 milliliters. The pump produces a volume of
approximately 7 milliliters with each complete and uniform
bulb compression.
3. To produce a flow rate of approximately 200 milliliters per minute
with the VeriFit Irritant Smoke Generator, uniformly and
completely compress the bulb smoothly and continuously every
2 seconds for 1 minute.
4. To produce a small, weak dilute concentration of smoke
using the VeriFit Irritant Smoke Generator, slowly and gently
compress the bulb at a controlled, uniform, steady rate until a
small, weak, diluted stream of smoke is produced that is the
absolute minimum necessary to elicit a response from the test
subject being tested. Then immediately stop compressing the
bulb and release the partially compressed bulb. No additional
smoke is to be generated.