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4
INSTRUCTIONS
USING THE MUTE FUNCTION
1. Press Mode. The speaker icon ashes simultaneously.
2. Press Enter, then press Up or Down to select on or o.
3. Press Enter again to save the data.
NOTE: The default (factory) seng for the alarm is o. Set the alarm on/o under MUTE funcon
as described above.
USING THE ALTI MODE:
1. Press Mode. The ALTI icon will ash.
2. Press Enter. ALTI will show on the display. Press the Mode buon to choose between m (meters)
and (feet).
3. Adjust altude to match your locaon (step=100m/500) using the Up and Down buons.
4. Press Enter again to save the data.
SETTING THE ALARM 1 LEVEL
1. Press Mode. The ALARM 1 icon will ash.
2. Press Enter. Use Up/Down to set the parameter. The default ALARM 1 is 800 ppm.
3. Press Enter again to save the data.
NOTE: When CO
2
Alarm level is ≥1,000 ppm, the interval is ±100ppm, and when the CO
2
Alarm level is
˂1,000 ppm, the interval is ±50 ppm. Aer seng a new alarm level parameter, the green LED will light
when CO
2
concentraon is below the Alarm 1 level.