5. Remove the gasket of the O
2
sensor.
The exhausted O
2
sensor must be disposed of as electronic waste with the code number
160215 "Dangerous component removed from used equipment". It must therefore be
disposed of correctly and in an environmentally-friendly manner by a local waste disposal
company.
6. Insert the new gasket.
7. Screw in the new O
2
sensor and tighten hand-tight.
8. Reconnect the plug.
9. Enter the date of installation of the new sensor in the menu item "O
2
cal. after install" as
described in section Calibration: O2 measuring range: Sensor inst. date (Page 117).
10.Calibrate the zero point of the new sensor as described in section Calibration: O2 measuring
range: Sensor inst. date (Page 117).
10.2.9 Replacing the hydrogen sulde sensor
DANGER
Danger of poisoning
The replacement of the sensor module represents interference in the gas path. The sample gas
circulating therein may contain toxic components that lead to death in certain concentrations.
To ensure that the sample gas path is free of toxic material when replacing the sensor module,
the gas path must be ushed with ambient air or nitrogen for a period of about 10 minutes
before performing the task.
WARNING
Danger of electric shock
The device will be open when the sensor is being replaced. This means present dangerous
contact voltage will be present, which can lead to electric shock.
For this reason, the sensor module may only be replaced when power is o.
Service and maintenance
10.2 Maintenance work
ULTRAMAT 23
174 Equipment Manual, 04/2022, A5E37100388-012
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