Page 28 of 43
Operating Manual
www.qedenv.com
SEM5000.002
© QED Environmental Systems Inc.
SEM5000 Surface Emissions Monitor
Extendable Sample Probe Maintenance
Replacing the Dust Filters
The SEM5000 extendable sample probe has two dust filters. The first is a sintered bronze
dust filter for course particles and is located inside the windscreen and the end of the wand.
The second is a cellulose fiber filter for fine dust particles and is located behind the
windscreen.
Both of these filters should be replaced periodically. It is recommended that, at a minimum,
they be changed at the beginning of each SEM event. You may need to change them more
often, depending on individual site conditions.
To change the bronze dust filter:
Using a 13mm socket, unscrew the bronze dust filter and
remove it from its position inside the windscreen
Discard the old filter and replace it with a new filter
Tighten the filter with your fingers and, if necessary, use
the 13mm socket for final tighten
