TSI Incorporated DUSTTRAK DRX 8533, Руководство по эксплуатации и обслуживанию

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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 monitor 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.