Rae ppbRAE 3000 User Manual

ppbRAE 3000 User’s Guide
42
Zero (Fresh Air) Calibration
This procedure determines the zero point of the sensor calibration
curve. To perform a fresh air calibration, use the calibration adapter to
connect the instrument to a “fresh” air source such as from a cylinder
or Tedlar bag (optional accessory). The “fresh” air is clean, dry air
without organic impurities and an oxygen value of 20.9%. If such an
air cylinder is not available, any clean ambient air without detectable
contaminants or a charcoal filter can be used.
At the Zero Calibration menu, you can proceed to perform a Zero
calibration or bypass Zero calibration and perform a Span calibration.
You may also go back to the initial Calibration menu if you want to
exit calibration.
 Press [Y/+] to start calibration.
 Press [MODE] to quit and return to the main calibration
display.
If you have pressed [Y/+] to enter Zero calibration, then you will see
this message:
1. Turn on your Zero calibration gas.
2. Press [Y/+] to start calibration.
Note: At this point, you may press [MODE] if you decide
that you do not want to initiate calibration. This will take you
directly to the Calibration menu, highlighted for Span
calibration.

Rae ppbRAE 3000 Specifications

General

Brand	Rae
Model	ppbRAE 3000
Category	Measuring Instruments
Language	English