TESTO 300 LL NEXT LEVEL - Second Screen; Gas path check; Device settings

8 Using the product
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8.2.4 Second Screen
In the Second Screen menu item, the Smart App connection can be activated or
deactivated. This is also where the connection PIN required for the initial
connection is stored.
To connect the testo 300 NEXT LEVEL to your smartphone or tablet, the
Second Screen connection must be activated.
1
Call up function: | Second Screen
2
Tap the Smart App connection selection field to activate (
)/deactivate ( ).
3
When connecting to the testo Smart App for the first time: enter the
displayed connection PIN in the testo Smart App, under the testo 300
Second Screen measurement program.
4
Back to Main menu: tap .
8.2.5 Gas path check
For flawless operation of the measuring instrument, regular tightness testing of
measurement systems (measuring instrument + flue gas probe) is
recommended.
1
Call up function: | Gas path check

Gas path check starts automatically.
2
Place the black sealing cap on the tip of the flue gas probe.

The pump flow is displayed. If the flow rate is less than 0.02 l/min, the
gas paths are not leaking and the measurement is ended.
3
Remove the sealing cap from the probe tip.
4
Back to the main menu: tap .
8.2.6 Device settings
8.2.6.1 Country version and language
Set up your measuring instrument country-specifically.
The country version configuration affects the measurement parameters, fuels,
fuel parameters and the bases of and formulas for calculations that are enabled.