TSI Instruments DustTrak 8540, Руководство по эксплуатации и обслуживанию

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39
Chapter 5
Maintenance
The DustTrak
™ Environmental Monitor can be maintained in the field
using the instructions below.
TSI
®
recommends the DustTrak
™ Environmental Monitor be returned
to the factory for annual calibration. For a reasonable fee, TSI
®
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 instrument is always in good
operating condition.
W A R N I N G
The only user-serviceable parts inside the DustTrak
™
Environmental Monitor are the gravimetric filter, pump,
and sheath flow filter accessible behind the removable
service panel.
The instrument case should only be opened by TSI
®
or a TSI
®
approved service technician.
NOTE
To maintain the MCERTS certification, it is required that the
MCERTS model photometers (8540-M, 8542-M, 8543-M) be
recalibrated on a yearly cycle.
Maintenance Schedule
The DustTrak
™ Environmental Monitor requires maintenance on a
regular basis. Table 1 lists the factory recommended maintenance
schedule.
Some maintenance items are required each time the DustTrak
™
monitor is used or on an annual basis. Other items are scheduled
according to how much aerosol is drawn through the instrument. For
example, TSI
®
recommends cleaning the inlet sample tube 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.