TESTO 300 LL - Carry out gas path check; Use of flue gas probe

9 Performing the measurement
43
9.3
Carry out gas path check
Regularly check the measurement system (measuring instrument + flue
gas probe) for leaks.
Too high an O2 value may be an indicator of a leaking measurement system.
>
| Gas path check.
9.4
Use of flue gas probe
Check thermocouple before use
>
The thermocouple of the flue gas
probe must not be touching the probe
cage.
Bend the thermocouple back if
necessary.
Align flue gas probe
>
The thermocouple must be freely
exposed to the flue gas flow.
Align the probe by turning it as
required.
Search for hot spot

The tip of the probe is in the hot spot of the flue gas.
1
Select Hot Spot.
2
Start hot spot search: tap .
3
Perform zeroing. Please follow the instructions.
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