SKC Limited Cyclone Sampler - Manual (Page 2)

Page 2 007-04-001 Issue C January 2009
SKC Limited 11 Sunrise Park, Higher Shaftesbury Road, Blandford Forum, Dorset DT11 8ST United Kingdom
T: +44 (0) 1258 480188 F: +44 (0) 1258 480184 E: [email protected] W: www.skcltd.com
Check that the thin O ring is fitted into the recess in the underside
of the sampler top. Place the sampler top on the cassette. Fit the
retaining ring over the sampler top and screw down firmly to secure
the cassette within the sampler and seal the cassette inlet and outlet.
Ensure that the grit pot is securely fitted over the ridge around the
bottom of the sampler body.
Flow Calibration
Connect the inlet hosetail of the sample pump to the air outlet of the
cyclone sampler with a length of flexible tubing. Connect the flow
calibration device (such as a rotameter or Defender primary calibrator)
to the air inlet of the cyclone sampler using a second length of flexible
tubing.
Calibrate the sample flow rate to 2.2 l/min.
Disconnect the tubing from the cyclone sampler inlet and outlet.
Remove the cassette from the cyclone sampler.
Hold the cassette upside down and prise the two halves apart using
the side tab. Remove and discard the calibration filter. Place the pre-
weighed filter to be used for the sample, onto the filter support grid and
re-assemble the cassette. Fit the cassette into the cyclone sampler.
Quickly re-check the flow rate and make any final adjustments. Switch
the sample pump off.
The cyclone sampler is now ready for sampling.
After Sampling
Away from the sample location quickly check the sample flow rate,
then disconnect the tubing from the cyclone sampler air inlet and
outlet.
Carefully remove the cassette from the cyclone sampler and split the
two parts of the cassette apart.
Post Weighing the Filter
Carefully lift the filter out of the cassette using tweezers. Post weigh
the filter.
The difference between the pre and post weights will give the
respirable sample.
Transportation
If further analysis is required, prepare the sample for transportation to
the laboratory by carefully placing the filter back in the cassette, and
fitting the yellow, U shaped sealing clip over the cassette inlet and
outlet holes. Use of the sealing clip prevents unwanted ingress or loss
of contaminant during transport. Alternatively, a 225-67 filter transport
cassette can be used, freeing the filter cassette for immediate re-use.
Retaining
ring
Sampler
top
Air outlet
O ring
Filter
cassette
O ring
Sampler
insert
O ring
Spring
clip
Sampler
body
Air inlet
Grit pot
Figure 2
Figure 3