5
Sampling
SKC tests indicate that a particulate mass of up to 6.8 mg on the four impaction
substrates would not affect PPI performance. This amount is equivalent to sampling
for 6 hours at 4 L/min in environments where respirable mass concentration is
4.76 mg/m
3
and equals 50% of total dust. However, labs have reported to SKC
that they prefer no more than 2 mg on the fi lter for analytical reasons. Therefore,
SKC recommends that you work with your lab to determine optimum sample times
for your unique sampling conditions.
1. As per good industrial hygiene practice, replace
representative sampler used for calibration with a
new, unused loaded sampler.
See Media and Sampler
Preparation
.
2. Record sample start time on label.
3. Clip Disposable PPI onto a worker’s collar or lapel in
the breathing zone or in the area to be sampled.
4.
Clip sample pump at the worker’s waist or close to the
Disposable PPI.
5. Use
fl
exible tubing to a
tt
ach the Disposable PPI
exhaust to the inlet of the sample pump.
6.
Turn on pump and record pertinent sample data.
7. After the desired sample time has elapsed, turn
o
ff
the pump and unclip sampler from sampling
location.
8. Apply Post-use label to inlet plate to seal the
sampler.
9. Record sample stop time on label on the bo
tt
om
of sampler.
10. Disconnect sampler from pump and reinstall
protective end cap on the exhaust.
11. Reinstate calibration train with representative Disposable PPI and verify
fl
ow
rate.
See Calibration
.
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6
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8
10
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