SKC Limited Universal Pump Step By Step Guide - Manual (Page 9)

www.skcltd.com 224-G3 Issue C Page 7
Respirable Dust Sampling using the Cyclone Sampler
fitted to the bottom of the cyclone sampler.
Grit Pot
Sampler
Body
Filter
Cassette
Air
Inlet
Air
Outlet
Sampler
Top
Retaining
Ring
3. Connect the top tubing connector (air
outlet) on the cyclone sampler to the inlet
hosetail on the right hand side of the sample
pump using the length of flexible tubing.
4. To set the flow rate required, in this case 2.2
litre/minute, a flow calibration device such as a
Defender primary calibrator or a rotameter should
be used. Make sure the flow calibrator is capable
of measuring the required flow rate. There are two
types of float used in rotameters. To read them
correctly depends on the type. To read a ball type
rotameter correctly take the reading at the centre
of the ball. To read a float type rotameter correctly
take the reading at the top edge of the float.
Refer to the figure below. The float of a float type
rotameter is usually marked with a number of dots.
The dots give indication that the float is spinning in
the airflow, thus showing that the float is not touching
the walls of the rotameter tube which could affect the
accuracy of the reading. Note that the rotameter must
be placed onto a flat, level surface to ensure that the
float does not touch the sides of the rotameter tube.
2
2
1
1
5
0
5
0
2
2
1
1
5
0
5
0
Read Here Read Here
Ball Type Float Type
5. Connect the air inlet of the cyclone sampler
to the hosetail on the Defender primary
calibrator marked 'Suction', with a length of