Replace O2 Sensor - TESTO 300 LL NEXT LEVEL Instruction Manual

10.7.1 Replace O2 sensor

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".
5
Close the measuring instrument.
After replacing an O2 sensor, wait for an acclimatization time of 15 min
to elapse before using the instrument.
When replacing an O2 sensor and when there is an interruption of the
power supply for more than 10 hours, we recommend an
acclimatization time of 1 hour for compliance with measuring accuracy.
10 Maintenance
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