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Chapter 4
Maintenance
The D
USTTRAK™ II aerosol monitor can be maintained in the field using the
instructions below. Additionally, TSI recommends that you return your
D
USTTRAK™ II to the factory for annual calibration. For a reasonable fee,
we will quickly clean and calibrate the unit and return it to you in “as new”
working condition, along with a Certificate of Calibration. This “annual
checkup” helps ensure that the D
USTTRAK™ II is always in good operating
condition.
WARNING
There are no user-serviceable parts inside this
instrument. The instrument should only be opened by TSI
or a TSI approved service technician.
Maintenance Schedule
Your DUSTTRAK™ II Aerosol Monitor requires maintenance on a regular
basis. Table 4–1 lists the factory recommended maintenance schedule.
Some maintenance items are required each time the D
USTTRAK™ monitor is
used or on an annual basis. Other items are scheduled according to how
much aerosol is drawn through the instrument. For example, cleaning the
inlet sample tube is recommended after 350 hours of sampling a 1 mg/m
3
concentration of aerosol. This recommendation should be pro-rated
according to how the instrument is used. 350 hours at 1 mg/m
3
is the same
amount of aerosol as 700 hours at 0.5 mg/m
3
or 175 hours at 2 mg/m
3
, etc.
Table 4–1. Recommended Maintenance Schedule
Item Frequency
Perform zero check Before each use.
Clean inlet 350 hr. at 1 mg/m
3
*
Clean 2.5 µm calibration impactor Before every use.
Replace internal filters 350 hr. at 1 mg/m
3
* or
when indicated by the main
screen filter error indicator.
Return to factory for cleaning and calibration Annually
*Pro-rated, see discussion above.
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