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│ 5 Maintenance
5. Select
Zero point
from the menu.
Do not confirm with OK
yet
.
6. Press and hold the release button on the test set. The test gas
is added.
Do not let go of the release button
.
7. Wait at least 1 minute. The displayed reading must be stable.
8. Press
OK
to confirm. The device is adjusted. The reading
shows zero (0.0 % vol.).
9. Let go of the release button on the test set.
10. Disconnect the device from the test set.
5.2.6.2 Adjusting the sensitivity for oxygen
The sensitivity for oxygen is adjusted with fresh air.
1. Make sure that only fresh air is being drawn in.
2. Open
Settings
.
3. Select
Adjustment
from the menu.
4. Select
Adjustment O2
from the menu.
5. Wait until the displayed reading is stable. (The reading may
still flash.)
6. Select
20.9 % VOL (fresh air)
from the menu.
7. Press
OK
to confirm. The sensitivity is adjusted. The reading
shows 20.9 % vol.
