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5 Maintenance
The following resources are needed for adjusting the zero point
of oxygen:
● Test gas
Information on test gases for adjustment can be found in Sec-
tion 5.2.2.
● Test set for the supply of test gas (e.g. SPE VOL)
Note:
Details of how to use the test set can be found in the accompa-
nying operating instructions.
1. Connect the device to the test set.
2. Open Settings.
3. Select Adjustment from the menu.
4. Select Adjustment O2 menu item.
5. Select Zero point menu item. Do not conrm 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 conrm. The device is adjusted. The reading
shows zero (0.0 % vol.).
9. Let go of the release button on the test set.
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