Page 2
007-04-002 Issue D January 2013
Loading the DPM cassette
As the DPM cassette is pre-assembled,
all that is required to prepare it for use is
to remove the red plugs from its inlet and
outlet ports. Retain the plugs to seal the
cassette for transport to the laboratory.
Assemble the grit pot, thick O ring and
insert to the cyclone body. Seat the
DPM cassette into the red sealing cup
in the base of the cyclone insert, as
shown to the right. Fit the thin O ring
into the recessed channel in the base of
the outlet funnel. Place the outlet funnel
centrally on top of the DPM cassette
and then fit the retaining ring, screwing
it down firmly to ensure a good seal of
the inlet and outlet of the cassette.
Sampling with the cyclone
Connect the cyclone outlet to the sample
pump via a length of flexible tubing.
Calibrate the pump flow rate using a
rotameter or other suitable calibrator.
Connect the rotameter to the sample air
inlet on the cyclone body with a length of
flexible tubing. The sample flow rate for the
DPM cyclone and DPM cassette is 2.0 litre/
min. Once the flow is set to the correct rate
switch the sample pump off. The sample
train is now ready for sampling.
After sampling
Unfasten the retaining ring and remove
the cassette. Immediately refit the red
plugs to the inlet and outlet ports of the
cassette to prevent unwanted ingress
or loss of contaminant during transport
to the laboratory. It is not necessary to
supply a blank to the laboratory as the
DPM cassette contains a built in blank.
Retaining
ring
Outlet funnel
Air out
to pump
Thin O ring
DPM
cassette
Cyclone
insert
Thick O ring
Cyclone
body
Grit pot
Sample
air inlet
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
A member of the SKC global group of companies