Chapter 4
48
The DustTrak monitor keeps track of the accumulated amount of aerosol
drawn through it since its last cleaning. When the internal filter replacement is
due, the filter error indicator will turn from green to red.
TSI recommends you perform a zero check prior to each use for the DustTrak
monitor and certainly before running any extended tests, and after the
instrument experiences a significant environmental change. Examples of
significant environmental changes would be ambient temperature changes
that exceed 15
F (8
°C) or moving from locations with high aerosol
concentrations to low concentrations.
Zeroing Instrument
1. Attach the zero filter to the inlet of the instrument.
Figure 4-1: Attach Zero Filter to Inlet
2. Follow zero calibration instructions detailed in the operations section of
this manual.
Cleaning the Inlet
The inlet should be cleaned based on the schedule in Table 4
–1.
1. Turn the DustTrak monitor off.
2. Unscrew the inlet nozzle from the instrument (Figure 4-2).
Figure 4-2: Unscrew Inlet Nozzle
