SKC 225-69 Operating Instructions

This instruction sheet covers the following sampler models:
225-69 Cyclone sampler with re-usable cassette for 25mm diameter filter
•
225-69-37 Cyclone sampler with re-usable cassette for 37mm diameter filter
•

Introduction

The cyclone sampler is designed for dust (aerosol) sampling to the respirable
convention as defined in standard EN481:1993.
Design flow rate is 3.0 l/min, giving a 50% sampling efficiency (cut point) at 4.0µm
(micron) particle size.
The cyclone sampler has been tested in accordance with EN 13205 by the Health and
Safety Laboratory (HSL) to verify its performance against the respirable convention.
A certificate of conformity detailing the results of this testing is included on page 4 of
this instruction.
The SKC plastic cyclone is manufactured from conductive plastic which dissipates
electrical charges to the surrounding atmosphere and prevents static interference on
the collection of the dust particles.
The filter is held within a re-usable plastic cassette, which is supplied complete with
a metal filter support grid and a sealing clip to prevent contamination of the sample
during transport for laboratory analysis.
For detailed instructions on air sampling in general and use of the cyclone sampler in
particular refer to SKC's 224-G1 Step by Step Guide to Air Sampling.
It is also recommended to obtain and read the document MDHS 14/4 "General
methods for sampling and gravimetric analysis of respirable, thoracic and inhalable
aerosols", available from the HSE website www.hse.gov.uk, before carrying out any
sampling using the cyclone sampler.

Preparing the Cyclone Sampler for Use

The following instructions give basic details on how to prepare for sampling by
gravimetric analysis according to MDHS 14/4.
Select two filters from the same box or batch. One filter is used whilst calibrating the
sample flow rate and is then discarded, and the other is pre-weighed to carry out the
actual sample.
It is recommended to wear powder free gloves and to use tweezers when handling
filters in order to prevent contamination prior to taking the sample.

Loading the cassette

Ensure that the cyclone sampler components are cleaned of any contamination, using
a detergent solution. Allow the components to dry fully before use.
Referring to Figure 1 on page 2, place the top part of the cassette (labelled "TOP")
upside down on a flat surface.
Cyclone Samplers for Respirable Dust
www.skcltd.com
Operating Instructions