SKC Limited Haz-Dust IV - Manual (Page 31)

Auto-Zero
Introduction Auto-Zero sets the measurement baseline of the Haz-Dust IV to zero mg/m 3 .
The Auto-Zero check should take place prior to beginning a new set of
measurements.
Auto-Zero Follow the steps in the table below to Auto-Zero the Haz-Dust IV.
Note: The battery should be fully charged before beginning the Auto-Zero
process.
Step Action
1 Be sure the appropriate sampling inlet is attached to the sensor
head of the Haz-Dust IV using the table below.
If sampling... Then insert the...
Thoracic Particulates Thoracic sampling inlet
Inhalable Particulate SKC IOM and IA-202
sampling inlet
Respirable Particulates SKC GS Cyclone and GSA-
202 sampling inlet
Figure 3-6. Diagram of zeroing filter being inserted into the Thoracic sampling inlet. This
procedure is used for both Thoracic and Inhalable dust particles.
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