Operation Manual

ToxiRAE Pro User’s Guide

3. Press [MODE] if you want to quit without calibrating.

During calibration, the calibration gas name, its concentration, and the countdown are

displayed. Depending upon the device alarm settings, the monitor may go into low and

then high alarm once span calibration is complete, which is expected in response to the

test gas.

Note: You can abort span calibration during its countdown by pressing [MODE].

Upon completion, the screen “Span is done!” appears along with the reading (it should be

within 10% of the span gas concentration).

Important! After calibration is complete, you must remove the Calibration Adapter from

the ToxiRAE Pro. If the Calibration Adapter is attached during normal operation,

inconsistent and lower-than-normal readings will occur because of decreased

concentration of the gas being monitored.

14.4.1. Changing Span Gas Concentration

If you selected “Change” for span gas concentration, the following screen appears:

1. Press [Y/+] repeatedly to select a desired number. Numbers increase from 0 to 9.

Once 9 is reached, pressing [Y/+] again “wraps” around back to 0.

2. Step from one digit to the next by pressing [MODE].

3. When you are done, press [MODE] until either “OK” or “Cancel” is selected.

Press [Y/+] to register your selection (if “OK” is highlighted) or to exit without

registering it (if “Cancel” is selected).