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Setting Up
13
Omni-directional Inlet Column
Optional accessory 854040
See the Quick Start Guide installing impactors PM
10
(854020), PM
2.5
(854021), PM
1
(854022) onto the omni-directional inlet for details.
Figure 6: Inlet, water trap and base with connection rings
Zero Calibration of Instrument
The DustTrak
™ Environmental Monitor has the ability to automatically
“Zero” the instrument readings at programmed intervals. “Zeroing” the
instrument resets the photo detector, to a signal that represents no
particles flowing through the optics. Over time, photometric light-
scattering instrument readings can drift due to changes in temperature
and aerosol build up in the optics.
Programming regular “Zero” events
corrects the photometric signal to account for these changes.
The DustTrak
™ Environmental Monitor automatically performs a zero
calibration when the instrument begins any programmed run and the
auto zero function has been enabled. Use the instructions detailed in
for enabling auto zero and configuring the automatic
interval using the TrakPro
™ software.
Summary of Contents for DustTrak 8540
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