ppbRAE 3000 User’s Guide
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3. Zero calibration starts a 30-second countdown and displays
this message:
Zeroing...
During the zeroing process, the instrument performs the Zero
calibration automatically and does not require any action on your part.
Note: To abort the zeroing process at any time and proceed to Span
calibration, press [N/-] at any time while zeroing is being performed.
You will see a confirmation message that says “Zero aborted!” and
then the Span calibration menu appears.
When Zero calibration is complete, you see this message:
Zeroing is done!
Reading = 0 ppb
The instrument will then show the Calibration menu on its display,
with Span Calib highlighted.
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