Data Sheet

8 Using the product
17
6
Set refrigerant.
6.1
Press the key [▼] (Rxx) (refrigerant number according to ISO 817).
-
The refrigerant menu opens and the
current refrigerant is highlighted.
6.2
Setting the refrigerant: Press [▲] or
[▼] to select the refrigerant and
press [Menu/Enter] to confirm.
You have the option of setting up favourite refrigerants on your
instrument and in the app. These then appear at the beginning of the
refrigerant list.
To do this, the app must be connected to the instrument via Bluetooth.
In the refrigerant list (App), you can now choose the refrigerant as a
favourite by clicking on the star.
The new favourite refrigerant will now be synchronized to the testo
550s or testo 557s.
Note: During synchronization, the refrigerant list/selection on the
instrument must remain closed.
-
The newly set refrigerant is displayed in the refrigerant list.
7
Press the [▲] (P=O) key for 2 seconds to zero the sensors.
-
Zeroing takes place.