TESTO 300 - Replace O2 Sensor

15 Maintenance
99
15.8 Replace O2 sensor
CAUTION
Acid in the sensors.
May cause chemical burns.
- Do not open the sensors.
- Always wear gloves when changing a sensor.
Eye contact: Rinse the affected eye thoroughly under running water for 10
minutes, keeping the eyelids wide open and protecting the unaffected eye.
Remove contact lenses wherever possible.
✓
Measuring instrument is open, see Section Open measuring
instrument.
1
Unlock retaining bracket and open
out.
2
Remove faulty sensor from the slot.
3
Insert new sensor in the slot.
Make sure that the socket on the
sensor circuit board is correctly
connected to the contact plug.
4
Close the retaining bracket with an audible "click".