Alarm Limits
To adjust an alarm limit, enter Config Mode and scroll
to the desired alarm: SET HIGH\LOW\STEL\TWA?.
•
Press Left to display the alarm value with the first
digit flashing
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Use Left to move to the desired flashing digit
•
Use Right to increase the value and cycle 0-9.
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When finished, scroll Right to OK and press Left to
save and exit.
Zero (Fresh Air) Calibration
Zero calibration sets the base line for the sensor and is
done in fresh air or other clean air source. Enter Config
Mode and “AiR?” displays as the first menu item. Press
the Left key to start the15-second zero calibration
count-down, after which a “pass” or “fail” result will be
displayed. To abort, press the Right key at any time
during the 15-second count, and “AbRT” displays to
confirm.
Span Calibration (continued)
Span calibration uses a known concentration gas to
determine the response of the sensor to the gas.
1. Attach the Calibration Adapter over the inlet port
on the front of unit by pressing it into place.
