SKC Limited Universal Pump Step By Step Guide - Manual (Page 10)

Page 8 224-G3 Issue C www.skcltd.com
Respirable Dust Sampling using the Cyclone Sampler
tubing. Turn on the Defender primary calibrator
and set it to take continuous flow readings.
6. If using a rotameter to set the flow rate, connect
the air inlet of the cyclone sampler to the hosetail
on the top of the rotameter using a length of
tubing. If a 'calidaptor' is fitted to the rotameter,
screw the threaded hosetail fitting supplied
with the calidaptor into the threaded hole in the
bottom of the calidaptor 'bowl', and connect
the cyclone sampler air inlet to the hosetail.
0
5
0
5
0
5
3
3
2
2
1
1
0
0
Calidaptor
(if fitted to
rotameter)
Hosetail
7. The pump flow rate is adjusted using the smallest
bladed screwdriver attachment of the toolkit supplied
with the pump. Unscrew and remove the keypad
cover from the pump and switch on the pump using
the on/off switch. Use the screwdriver tool to turn the
adjustment screw labelled 'FLOW ADJ'. As the screw
is turned the flow reading on the flow calibrator should
increase or decrease. If this does not happen check
the system for leaks or blockages. One common
cause of lack of flow is by using the separation papers
(usually coloured blue) sometimes found in boxes of
filters instead of the filters themselves (usually white).
Once the flow is set to the required level of 2.2 litre/
min switch the sample pump off.
8. Remove the filter cassette from the cyclone sampler
body, replace the filter paper in the cyclone cassette
with the pre-weighed filter paper, and refit the cassette
into the cyclone sampler. Check the flow rate once
again with the pre-weighed filter in place and make
any final adjustments needed to bring the flow to
the required level. It is advisable to do this as quickly
as possible to minimise the chance of collecting
anything that may affect the final result. The cyclone
sampler is now ready to take into the workplace.
New filter
for sample
Filter used for
calibration
9. Mount the sample train (comprising the sample
pump, tubing and cyclone sampler) onto the
worker who is to wear it during the sample. The
cyclone sampler should be mounted as close to
the breathing zone as is practical and comfortable.
The pump can be either clipped to a belt or placed
into a pouch. Note that the connecting tube can
present a hazard if left to flap around, in much the
same way as a necktie. Measures should be taken
to protect the wearer by clipping or restraining the
tube so that it cannot become caught up in anything.
30cm
Diameter
Breathing
Zone
Cyclone
Sampler
Pump