SKC Limited IOM Multi-Dust Sampler - Manual (Page 2)

Page 2 007-05-003 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
Foam
insert
Cassette
front
Filter
Cassette
support
grid
Fitting the cassette into the I.O.M. sampler
Ensure that the O ring seals are correctly fitted to the I.O.M.
sampler. Fit the cassette into the sampler body. Screw the sampler
front plate into the sampler body, tightening securely to achieve a
good seal of all of the O rings.
Sampler
inlet
Flow Calibration
Connect the inlet hosetail of the sample pump to the outlet hosetail
of the I.O.M. sampler with a length of flexible tubing. Connect the
flow calibration device (such as a rotameter or Defender primary
calibrator) to the sampler inlet (identified in Figure 3) using an SKC
calibration adaptor (“calidaptor” - part number 391-01). Refer to
the instructions supplied with the calidaptor for further details.
Calibrate the sample flow rate to 2.0 l/min.
Disconnect the I.O.M. sampler from the calibration device. Remove
the cassette from the sampler body, separate the two parts of the
cassette, and remove and discard the calibration filter (and foam
insert).
Pre-Weighing the Filter
Ensure that the parts of the cassette are clean and free of any
contamination.
For inhalable dust sampling -
• Place the remaining filter, to be used for the sample, onto the
cassette support grid. Fit the cassette front to the support
grid, pressing firmly until the two parts snap together.
• Pre-weigh the complete filter and cassette assembly.
For respirable and multi-dust sampling -
• Place the remaining filter, to be used for the sample, onto the
cassette support grid.
• Pre-weigh the filter and support grid only.
• Fit the cassette front to the support grid, pressing firmly until
the two parts snap together. Fit the remaining foam insert, to
be used for the sample, into the inlet of the cassette front,
pressing it in evenly until the front of the foam insert sits just
below the front rim of the cassette front.
• If carrying out multi-dust sampling, pre-weigh the complete
filter, foam and cassette assembly.
Final Checks
Fit the assembled, pre-weighed cassette into the I.O.M. sampler
and secure with the sampler front plate, ensuring a good seal of all
of the O rings.
Quickly re-check the sample flow rate and make any final
adjustments. Switch the sample pump off.
Fit the cassette sealing cap to the sampler to prevent contamination
of the cassette prior to starting the sample.
The I.O.M. sampler is now ready for sampling.
After Sampling
Away from the sample location quickly check the sample flow rate.
Carefully remove the cassette from the sampler body.
Post Weighing the Filter
For inhalable dust sampling -
• Post-weigh the complete filter and cassette assembly.
• The difference between the pre and post weights of the
complete filter and cassette assembly will give the inhalable
sample.
For respirable and multi-dust sampling -
• If carrying out multi-dust sampling, post-weigh the complete
filter, foam and cassette assembly.
• Carefully separate the two parts of the cassette, and post
weigh the cassette support grid and filter only.
• The difference between the pre and post weights of the
complete filter, foam and cassette assembly will give the
inhalable sample.
• The difference between the pre and post weights of the filter
and cassette support grid only will give the respirable sample.
Transportation
If further analysis is required, prepare the sample for transportation
to the laboratory by carefully re-assembling the cassette, fitting the
cassette sealing cap, and fitting the cassette into the transport clip.
This will prevent unwanted ingress or loss of contaminant during
transport.
Foam Insert Ordering Information
Part Number Description
225-772 Respirable foam insert (pack of 10)
225-772-50 Respirable foam insert (pack of 50)
Figure 2
Figure 3
Figure 4