64
Appendix B
Operation
Overview
The D
USTTRAK Environmental Enclosure can be used in conjunction with
the D
USTTRAK monitor for many different applications. Its primary use is in
outdoor applications to give the D
USTTRAK monitor protection from the
elements and the ability to sample efficiently in different wind speeds. The
enclosure and extended-life battery may also be advantageous in indoor
industrial applications, to provide additional security and protection to the
D
USTTRAK monitor.
How to Properly Orient the Environmental Enclosure
The Environmental Enclosure should be set up in a location where it can
sample the particles of interest. It should be placed “out in the open,” away
from obstructions which may affect wind currents. It should not, for
example, be placed at the corner of a building, which would cause swirling
wind currents and result in poor particle sampling.
The Environmental Enclosure should be used in wind conditions with speeds
of 22 mph or less to obtain the most accurate readings. An increase in wind
speed over 22 mph can decrease the sampling efficiency of the inlet to under
the efficiency specified by PM-10 standards. If wind gusts of over 22 mph
are present, the data collected is still valid, but be aware that the readings
will be slightly lower than the actual mass concentration of aerosol present.
See Application Note ITI-060 for more information on the wind speed
dependency of the external inlet’s sampling characteristics.
Changing and Re-charging the Battery Packs
The battery pack within the Environmental Enclosure should be changed
every 24 hours of use during the daily maintenance check described in the
Maintenance Section. A voltage cutoff switch will cut the power to the
D
USTTRAK monitor when the battery voltage reaches 5.1 V. This ensures
that the battery does not become deeply discharged. Preventing this
condition will prolong the life of the battery.
Receiving Data from the D
USTTRAK Aerosol Monitor
The DUSTTRAK monitor records data in either the manual sampling mode
(LOG 1) or the programmable modes (LOG 2, LOG 3). See the D
USTTRAK
User Manual for more information on setting up the logging modes. The
data can be downloaded by opening the Environmental Enclosure lid,
attaching the supplied RJ45/RS-232 cable from the D
USTTRAK monitor to a
computer COM port, and using the RECEIVE DATA command within the
T
RAKPRO software.
To Next Page
Loading...
