Operation
23
Zero Cal
Run
Zero Cal
the first time the instrument is used and repeat prior to every
use. Zero Cal requires that the zero filter be attached prior to running. Zero
Cal must also be performed if the unit is reading negative concentrations. It is
not possible for the DustTrak to read negative concentrations. Negative
concentrations are a symptom of zero drift.
NEVER
perform a zero cal without attaching a zero filter.
1. Press
Zero Cal
Button
2. Attach Zero Filter
3. Press the
Start
button to start Zeroing process.
4. A count-down clock will appear indicating the time remaining. The screen
with indicate “Zero Cal Complete” when done.
Remove filter after zeroing has been completed. The instrument is now zero
calibrated and ready for use.
